Important Safety Information

Important Safety Information

This product is powered by a certified limited power source (LPS), Power over Ethernet (PoE); through CAT5 or CAT6 connection wiring to an IEEE 802.3af compliant network PoE switch. The product is intended for installation indoors. All wiring connections to the product must be in the same building. If the product is installed beyond the building perimeter or used in an inter-building application, the wiring connections must be protected against overvoltage / transient. Algo recommends that this product be installed by a qualified electrician.

If you are unable to understand the English language safety information then please contact Algo by email for assistance before attempting an installation support@algosolutions.com.

Consignes de Sécurité Importantes

Ce produit est alimenté par une source d’alimentation limitée certifiée (alimentation par Ethernet); des câbles de catégorie 5 et 6 joignent un commutateur réseau à alimentation par Ethernet homologué IEEE 802.3af. Le produit est conçu pour être installé à l’intérieur. Tout le câblage rattaché au produit doit se trouver dans le même édifice. Si le produit est installé au-delà du périmètre de l’édifice ou utilisé pour plusieurs édifices, le câblage doit être protégé des surtensions transitoires. Algo recommande qu’un électricien qualifié se charge de l’installation de ce produit.

Si vous ne pouvez comprendre les consignes de sécurité en anglais, veuillez communiquer avec Algo par courriel avant d’entreprendre l’installation au support@algosolutions.com.

Información de Seguridad Importante

Este producto funciona con una fuente de alimentación limitada (Limited Power Source, LPS) certificada, Alimentación a través de Ethernet (Power over Ethernet, PoE); mediante un cable de conexión CAT5 o CAT6 a un conmutador de red con PoE en cumplimiento con IEEE 802.3af. El producto se debe instalar en lugares cerrados.

Todas las conexiones cableadas al producto deben estar en el mismo edificio. Si el producto se instala fuera del perímetro del edificio o se utiliza en una aplicación en varios edificios, las conexiones cableadas se deben proteger contra sobretensión o corriente transitoria. Algo recomienda que la instalación de este producto la realice un electricista calificado.

Si usted no puede comprender la información de seguridad en inglés, comuníquese con Algo por correo electrónico para obtener asistencia antes de intentar instalarlo: support@algosolutions.com.

Wichtige Sicherheitsinformationen

Dieses Produkt wird durch eine zertifizierte Stromquelle mit begrenzter Leistung (LPS – Limited Power Source) betrieben. Die Stromversorgung erfolgt über Ethernet (PoE – Power over Ethernet). Dies geschieht durch eine Cat-5-Verbindung oder eine Cat-6-Verbindung zu einer IEEE 802.3af-konformen Ethernet-Netzwerkweiche. Das Produkt wurde konzipiert für die Installation innerhalb eines Gebäudes. Alle Kabelverbindungen zum Produkt müssen im selben Gebäude bestehen. Wenn das Produkt jenseits des Gebäudes oder für mehrere Gebäude genutzt wird, müssen die Kabelverbindungen vor Überspannung und Spannungssprüngen geschützt werden. Algo empfiehlt das Produkt von einem qualifizierten Elektriker installieren zu lassenv.

Sollten Sie die englischen Sicherheitsinformationen nicht verstehen, kontaktieren Sie bitte Algo per Email bevor Sie mit der Installation beginnen, um Unterstützung zu erhalten. Algo kann unter der folgenden E-Mail-Adresse erreicht werden: support@algosolutions.com.

安全须知

本产品由认证的受限电源（LPS），以太网供电（PoE），通过 CAT5 或CAT6 线路联接至 IEEE 802.3at PoE+ or 802.3af 兼容的PoE 网络交换机供电。本产品适用于室内或建筑物周 边安装。所有联接本产品的线路必须源自同一建筑物。本产品如需用于超出建筑物周边范围或跨建筑物的安装，线路联接部分必须有过压和瞬态保护。Algo 建议本产品由专业电工安装。

如果您对理解英文版安全须知有问题，安装前请通过电子邮件和Algo 联系，support@algosolutions.com 。

EMERGENCY COMMUNICATION

If used in an emergency communication application, the 8373 IP Zone Paging Adapter should be routinely tested. SNMP supervision is recommended for assurance of proper operation. Contact Algo for other methods of operational assurance.

WET OR OUTDOOR ENVIRONMENTS

The 8373 IP Zone Paging Adapter is intended for dry indoor locations only. For outdoor locations Algo offers weatherproof speakers and strobe lights.

CAT5 or CAT6 connection wiring to an IEEE 802.3af compliant network PoE switch must not leave the building perimeter without adequate lightning protection.

No wiring connected to the 8373 IP Zone Paging Adapter may leave the building perimeter without adequate lightning protection.

Overview

Introduction

The 8373 IP Zone Paging Adapter creates multiple paging zones, while interfacing between the SIP-enabled phone system and the traditional paging amplifier. When answering an inbound call, the 8373 can route the call’s audio to the amplifier, via an analog connector. One amplified audio stream can then be fed back into the 8373 and sent to one or more of the three speaker Channels at a time. It is important to note that the 8373 doesn’t allow different audio streams to play on two Channels simultaneously as it is designed to interface with a single amplifier. To interface with multiple amplifiers, we recommend using multiple Algo 8301 Paging Adapters instead.

The 8373 can register as a voice paging SIP extension with a hosted or enterprise Communications Server supporting 3^rd party SIP endpoints. Multiple SIP paging extensions may also be registered on the 8373, one for each zone in use.

Multicasting capabilities allow a SIP registered 8373 to page and simultaneously stream multicast audio to other Algo devices. Only one 8373 is required to register as a SIP extension when using multiple adapters in a SIP environment.

Connection to the amplifier is made using a balanced and isolated line level output provided as either an XLR-mini connection (front) or pluggable terminal block for twisted pair wiring (back). The audio level can be adjusted manually or set to a defined level independent of input.

The 8373 IP Zone Paging Adapter is configured using central provisioning features or by accessing a web interface using browsers such as Chrome, Firefox, or Edge.

What is Included

• 8373 Zone Paging Adapter

• Network Cable

• Wall Mount Bracket and screws

• Five pluggable terminal block for relay input and output

• Terminal block cover

• Flat head screwdriver

• Getting Started Sheet

What is not Included

• Optional 2504 Output XLR-Mini Female to Male

• This User Guide

Typical Applications

The 8373 IP Zone Paging Adapter is typically used to connect an existing paging amplifier to a UC environment either as a SIP extension or multicast endpoint. The 8373 can relay the single unique audio stream from the amplifier to one of the 3 speaker channels, creating a “zoned” paging system. Two or all three channels may be activated simultaneously to page all speakers.

The 8373 will replace a legacy zone controller or create page zones from a previously single-zoned analog amplifier. It creates a hybrid voice paging solution to integrate analog speaker infrastructure and multicast to Algo IP speakers, strobe lights, and paging adapters, in addition to multicast-supported IP telephones.

The Line Output of the 8373 is connected directly to the dry audio input on the amplifier with an input impedance between 600 Ohm and 10 kOhm.

For amplifiers connected directly to the dry page port of an existing telephone system, the 8373 will provide a very similar interface providing both dry page audio and dry contact closure to activate the amplifier (if required).

For amplifiers connected to a FXS port or ATA through a “telephone answering device”, the 8373 will replace the answering device and eliminate the need for a FXS port or ATA. Please note the 8373 does not provide a FXS port interface.

Setup and Installation

Getting Started - Quick Install & Test

Note

This guide provides important safety information which should be read thoroughly before permanently installing the adapter.

1. Connect the 8373 IP Zone Paging Adapter to an IEEE 802.3af compliant PoE network switch or PoE injector. The blue lights on the front will remain on until boot up is completed – about 1 minute.

2. After the blue lights turn off, press the reset switch (RST) to hear the IP address over the Line Out port. The IP address may also be discovered by downloading the Algo locator tool to find Algo devices on your network: www.algosolutions.com/locator

3. Connect the adapter Line Out to an input amplifier using the mini-XLR connector (front) or pluggable terminal block (back).

4. Connect the output of the amplifier to the Amp In terminals.

5. Connect each speaker run to Channel 1, 2 or 3.

6. Access the 8373 IP Zone Paging Adapter web page by entering the IP address into a browser (e.g. Chrome, Firefox or Edge) and login using the default password algo.

7. Enter the IP address or the name for the SIP server into the SIP Domain field under the BASIC SETTINGS → SIP tab.

8. Enter the SIP Extension, Authentication ID, and Password.

   Note

   The Authentication ID may also be called Username for some SIP servers, and in some cases may be the same as the SIP extension.

9. Verify the extension is properly registered with the SIP server in the Status tab. Ensure the SIP Registration is “Successful”.

10. Make a call to the adapter by dialling its extension from a telephone. A prompt tone will be heard when the 8373 answers – press “1” to call zone 1, which will activate the relay for Channel 1 based on the default settings.

Installation

The 8373 is wall mountable in a horizontal orientation using the supplied bracket.

Example installation on ½” drywall:

1. Use appropriate drywall anchors for #8 screws, and pre-drill per anchor manufacturer’s instructions. Insert 4 anchors into the wall, and then attach bracket to wall anchors using #8 screws. Snap the 8373 into the bracket.

2. Connect the 8373 to a PoE network switch.

3. Connect the audio output of the 8373 to an amplifier input using either the mini-XLR output (male pins) or pluggable terminal block. The 8373 provides a dry audio output and dry contact closure.

   An optional XLR output audio cable (Algo 2504) may be ordered for audio amplifiers using standard XLR input connectors.

Programming and Configuration

The 8373 IP Zone Paging Adapter is configurable using the web interface or provisioning features.

After bootup the blue lights on the front will turn off and the adapter will have obtained an IP address. If there is no DHCP server the 8373 IP Zone Paging Adapter will default to the static IP address 192.168.1.111.

The IP address can be heard over the Line Out port when the reset switch (RST) is pressed. (Do not press this button during boot-up as it will cause the device to reset to factory defaults). The IP address may be discovered by downloading the Algo locator tool to find Algo devices on your network: www.algosolutions.com/locator

Enter the IP address (e.g. 192.168.1.111) into a browser such as Google Chrome, Firefox, or Edge. The web interface should be visible and the default password will be algo in lower case letters.

Features

SIP Paging: Introduction

The 8373 has only one audio output, and therefore can only support a single unique audio stream at any given time. This is ideal when connecting to a single zone amplifier that also only supports a single audio path at a time. The Channel relays then allow the speakers to be broken off into groups, creating a “zoned” paging system.

The 8373 can be registered as one or more SIP extensions with the SIP phone system, and will auto-answer inbound calls to these extensions, play a pre-announce tone, and allow voice paging until disconnected.

The simplest scenario is to configure the 8373 with a single SIP extension on the phone system, and then use the DTMF keys on the phone to select the zone that you would like to page. An alternate approach is to register multiple SIP extensions, one for each zone that you wish to use, so that each can be dialed directly without the need for the user to remember the different DTMF zone numbers. Both of these scenarios are described in more detail in the examples below.

If a VLAN is used on your network, navigate to the Advanced Settings → Network tab to set VLAN options.

Note

Once the adapter is using VLAN you will need to be on the same VLAN to access the web interface.

There are a number of configurable adapter options:

• Increase or decrease speaker volume

• Enable AGC (automatic gain control)

• Customize pre-announce tone file

The best voice paging quality and intelligibility will be obtained using the G.722 wideband audio codec. Most current IP telephones support G.722 which is sometimes referred to as “HD” voice or audio.

SIP Paging: Single SIP Extension

Up to 50 zones can be assigned on each of the three 8373 Channels. The 8373 will auto-answer an inbound call to the SIP extension, e.g. 1000, and a brief tone will prompt the caller to dial a DTMF key to select the desired zone. For example, if zone 2 is assigned to Channel 2, dialing “2” will activate Channel 2 and provide audio to speakers connected to this channel. If zone 2 is associated with channels 2 and 3, dialing “2” will activate both channels and play the audio on the speakers associated with these 2 channels.

Note

DTMF codes for zones 10 and higher start with an “*”.

To register the adapter with a single SIP extension, use the Basic Settings → SIP tab in the web interface to enter the SIP Server IP address, extension, username, and password. This information will be available from the IT Administrator or telehpone service provider.

Specific zones can be assigned to Channels by going to the Basic Settings → Channels tab.

SIP Paging: Multiple SIP Extensions

Multiple SIP extensions can also be registered on the 8373, one for each zone in use, using the tab: Additional Features → More Page Extensions. This allows the advantage of dialing directly to a zone without needing to enter DMTF, allowing the use of speed-dial keys. Additional SIP licenses may be required by the SIP provider.

SIP Paging: 9 Zones Using One Amplifier

To create more than 3 zones, additional 8373’s may be connected to the single amplifier via the AMP IN on the back of each of the 8373’s. The first 8373 should be assigned as a Multicast Sender, and the remainder as Receivers. Each Receiver relay channel can then be independently assigned to different paging zones. Dialing the Multicast Sender can now activate up to 9 Channels, and play the audio on all associated speakers.

Note

When using Receiver 8373’s in this configuration of multicast combined with a single amplifier driving the Receiver 8373’s, the system must be designed with only a single Sender device in order to ensure that the audio being received from the amp matches the multicast control signals seen at each Receiver.

Up to 50 zones can be configured. The first nine “basic” zones are available by default. Additional “expanded” zones can also be enabled in the Basic Settings → Multicast tab. If the amplifier already supports three zones, and you wish to use all three simultaneously, then three Algo 8301 Paging Adapters might be the tool for the job instead.

Any combination of Algo SIP endpoints can be integrated using multicast, or kept independent by registering additional SIP extensions on each. For instance, in addition to a single 8373 driving an amplifier and creating 3 speaker zones, any number of 8188 Ceiling Speakers can also be added as Multicast Receivers, and automatically play the same audio as was sent to the amplifier & speakers.

SIP Paging: Using Multicast

Multicast can be used to integrate the 8373 with other Algo SIP Endpoints to create a fully-integrated Paging solution.

Only the Multicast Sender device is required to register as a SIP extension when using multiple Algo devices in a SIP environment. Thus, the Receiver adapters do not require SIP extensions and do not need to register with the SIP Communication Server.

Each of the 3 relay channels on the 8373 can be assigned to any zone, or group of zones, as described in the other examples above, and likewise, each of the other Algo SIP endpoints can be assigned to one or more zones. Any one of the devices can be the Sender, and the rest can be configured as Receivers. As usual, either a single SIP extension (with DTMF selectable zone), or multiple SIP extensions (one per zone) can be configured on the Sender, depending on the preference of the end user.

Multicast Page Zones

The 8373 IP Zone Paging Adapter supports nine “basic” multicast zones. These zones are defined by the multicast IP addresses.

Somewhat arbitrarily, these zones are defined below but may be used in other ways. The important consideration is that there is a priority hierarchy – streaming activity on a zone higher on the list will be treated as a higher priority than a zone lower on the list – with music being the lowest priority.

• Priority

• All Call

• Zone 1

• Zone 2

• Zone 3

• Zone 4

• Zone 5

• Zone 6

• Music

“Expanded” zones can also be enabled, allowing up to 50 zones in total. These have the same behaviours as the basic zones, but are hidden by default to simplify the interface. Note: DTMF codes for zones 10 and higher start with an “*”.

Poly Group Paging

The 8373 IP Zone Paging Adapter has been designed to support Poly Group Paging.

The 8373 IP Zone Paging Adapter can be added to a Poly group page so that voice paging is heard over Poly telephone speakers and overhead paging simultaneously.

Poly Group Paging can be configured on the Basic Settings → Multicast tab.

Note

The 8373 IP Zone Paging Adapter may be accessed remotely via SIP and may generate a multicast page within the LAN sending voice page to both Algo paging endpoints and Poly telephones. Audio delay may be added to the 8373 IP Zone Paging Adapter to synchronize with voice page over the Poly telephone speakers.

TLS for SIP Signaling and Provisioning

Algo devices that support firmware 1.6.4 or later support Transport Layer Security (TLS). This feature adds security by ensuring that Algo products can trust the hosted SIP server. This is useful for when third-party devices or attackers may try to intercept, replicate, or alter Algo products, and try to connect to the server. TLS protocol will ensure that third parties cannot read/modify any actual data. Previously, security was less of a concern because phone systems were on isolated networks, but hosted services are becoming increasingly more common. Using a hosted SIP service requires traffic to be sent over the public internet and thus much more susceptible to attacks.

Signed certificates are an important piece in the Algo device’s operation, to ensure the security, integrity, and privacy of its communication. Algo components that use TLS are Provisioning and SIP Signaling.

These Algo devices each come pre-loaded with certificates from a list of trusted certificate authorities (CA), which are installed in the hardware at the time of manufacture. Note these pre-installed trusted certificates are not visible to users and are separate from the ‘certs’ folder.

The TLS handshake happens to make sure that the client and server can trust each other, and once that trust is established, the two parties can freely send encrypted data and decrypt any data that they receive. After the TLS handshake process is complete, a TLS session is established, and the server and client can then exchange messages that are symmetrically encrypted with shared (pre-Sender) secret key.

For further details reference the Algo TLS guide for SIP Signalling and HTTPS Provisioning.

Uploading Public CA Certificates to Algo SIP Endpoints

To install the public CA certificate on the Algo 8373, follow the steps below:

1. Obtain a public certificate from your Certificate Authority.

2. Rename the public certificate 'siptrusted.pem' (only .pem format is supported).

3. In the web interface of the Algo device, navigate to the Advanced Settings → File Manager tab.

4. Upload the certificate files into the 'certs' directory. Click the Upload button in the top left corner of the file manager and browse to the certificate.

For SIP TLS, no default public CA certificates are used; only the above .pem file is supported, so this certificate file must be uploaded in order for SIP TLS authentication to occur.

For Provisioning TLS, only the default pre-installed public CA certificates are supported; No .pem file can be uploaded in this case.

HTTPS Provisioning

Provisioning can be secured by setting the ‘Download Method’ to ‘HTTPS’ (under the Advanced Settings → Provisioning tab). This prevents configuration files from being read by an unwanted third-party. This resolves the potential risk of having sensitive data stolen, such as admin passwords and SIP credentials.

Note

To verify the server ‘Enable’ the ‘Validate Server Certificate’ option. This then checks if the certificate that is provided by the server is signed by any of the CAs included in the list of trusted CAs (used by the Debian infrastructure and Mozilla browsers). If we receive a certificate signed by any of these CAs, then that server will be trusted.

The ‘Validate Server Certificate’ parameter can also be enabled through provisioning:

prov.download.cert = 1

SIP Signaling (and RTP Audio)

SIP signalling is secured by setting ‘SIP Transportation’ to ‘TLS’ (under the Advanced Settings → Advanced SIP tab). Setting it to ‘TLS’ ensures that the SIP traffic will be encrypted. The SIP signalling is responsible for establishing the call (the control signals to start and end the call with the other party), but it does not contain the audio.

For the audio (voice) path, use the setting ‘SDP SRTP Offer’. Setting this to ‘Optional’, means the SIP call’s RTP audio data will be encrypted (using SRTP) if the other party also supports audio encryption. If the other party does not support SRTP, then the call will still proceed, but with unencrypted audio. In order to make audio encryption mandatory for all calls, set ‘SDP SRTP Offer’ to ‘Standard’. In this case, if the other party does not support audio encryption, then the call attempt will be rejected.

Note

In order for a SIP server to validate the Algo device, an additional certificate has to be manually installed on the 8301. To add this user certificate file use a ‘.pem’ filetype extension and have the file named ‘sipclient’. This is done by manually adding a file named ‘sipclient.pem’, which contains a device certificate and private key, to the ‘certs’ folder (under the ‘Advanced Settings’ tab File Manager’). In the future, ‘.crt’, ‘.cer’, and ‘.der’ certificate extensions will also be supported and you will not be restricted to naming the file ‘sipclient.pem’.

Wiring Connections

The wiring diagram below illustrates one of the most common use cases, where the Line Output of the 8373 is connected directly to the dry audio input on an amplifier with an input impedance between 600 Ohm and 10 kOhm. The amplifier output is then connected back to the 8373 Amp In terminals and the speaker runs get wired to Channel 1, 2 or 3.

The 8373 output level can be adjusted to match the amplifier’s input specification. Check the Basic Settings -→ Features section for more details. The optional dry contact closure can be used to activate the amplifier (if required).

Note

Please note the 8373 can switch up to 280W. Going over this might damage the internal components.

8373 Zone Paging Adapter: Front View

8373 Zone Paging Adapter: Back View

Network Connection (Front)

The 8373 provides a RJ45 jack for network connection. A cable run from the switch can be terminated to a modular jack with connection by patch cord, or terminated with a RJ45 plug.

PoE (Power over Ethernet) must be 48V 350 mA IEEE 802.3af compliant whether provided by the network switch or injector.

There are two lights on the Ethernet jack:

Green light: On when Ethernet is working, flickers off to indicate activity on the port.

Amber light: Off when successful 100Mbps link is established. Typically on only briefly at power up.

Under normal conditions, the Amber light will turn on immediately after the Ethernet cable is first connected. This indicates that PoE power has been successfully applied. Once the device connects to the network, it will switch to the Green light instead, which will typically flicker indicating traffic on the network.

Line Out XLR-Mini (Front)

Balanced and isolated audio output to external amplifier. Locking mini-XLR female to standard XLR male cable available. Output level defined using web interface.

Terminal Block Line Out (Back)

Wire pair output parallel to XLR-MINI LINE OUT that may be used for connecting to an external amplifier.

Terminal Block Relay Out (Back)

By default these terminals provide a contact closure when the 8373 IP Zone Paging Adapter is active. Please note this is a normally open relay only.

Channel 1/2/3 (Back)

The relays will switch audio from the amplifier to the appropriate output channels. The connections for the output of the external amplifier and distribution to up to three speaker runs (or channels) are identified as + (plus), - (minus), and SHLD (shield). The + and – only serve to maintain polarity if important for speaker phasing but will not normally be critical. The SHLD input and output is not connected to anything internally inside the 8373. The SHLD connections are all tied together and serve only as a convenience if using speaker wire with a shield. If the shield wire is connected to Earth Ground at the amplifier then Earth Ground will be distributed to each speaker run.

AMP IN (Back)

Connect the output of the amplifier.

Terminal Block Cover

When connected to 70V or 100V paging amplifiers, the included connector guard should be snapped onto the output terminal blocks (CH 1, 2, 3, and AMP IN) after wall mounting and wiring connections are made. The cover is designed to prevent accidental contact with the high voltage amplifier output.

Blue LED Indicators

SIP

Steady light will appear when the SIP extension is registered. The LED light will blink when the device is engaged in a SIP call.

Channel 1/2/3

Steady light when the channel is activated.

Note

All 4 blue LEDs will be on during power up and boot process.

Reset

A recessed reset button (RST) next to the Ethernet Jack can only be used to reset the 8373 IP Zone Paging Adapter at time of power up. To return all settings to a factory default, reboot or power cycle the 8373. Wait until the SIP LED flashes and then press and hold the reset button until the SIP LED begins a double flash pattern. Release the reset button and allow the unit to complete its boot process.

Do not press the reset button until the SIP LED begins flashing.

A reset will set all configuration options to factory default including the password.

Once booting has completed, pressing the reset button will cause the device to speak its IP address over the line out port.

Web Interface Status and Login

Web Interface login

Web Interface is accessed by entering the 8373’s IP Address into a web browser.

The web interface requires a password which is ‘algo’ by default. This password can be changed using the Admin tab after logging in the first time.

Note

It is highly recommended to change the default password if the device is directly connected to a public network.

Status

The device’s Status page will be available before and after log on. The section can be used to check 8373’s SIP Registration, Call Status, Multicast Mode/Status, Relay Status, Proxy Status, and general MAC, IP, Netmask, Date/Time, and Timezone information.

Note

The Status page can be hidden when logged out for security purposes under the Advanced Settings → Admin tab.

Web Interface Basic Settings

Basic Settings Tab – SIP

SIP Server information and Credentials should be obtained from your telephone system administrator or hosted account provider. After saving the settings, see the Status tab to confirm the registration was successful.

Note

Any time changes are made to settings in the Web Interface the ‘Save’ button must be clicked to save the changes.

SIP Domain (Proxy Server)

The IP address (e.g. 192.168.1.111) or domain name (e.g. myserver.com) of the SIP Server.

Page Extension

This is the SIP extension for the 8373 Zone Paging Adapter. The Page Extension uses "DTMF Selectable Zone" mode. After the Page call is answered, use DTMF to enter a zone number in order to activate the desired relay(s). As an alternative, a unique extension can be assigned per zone in Additional Features → More Page Extensions.

Authentication ID

May also be called Username for some SIP servers and in some cases may be the same as the SIP extension.

Authentication Password

SIP password provided by the system administrator for the SIP account.

Basic Settings Tab – Features

Test Tone

Select audio file to play over the associated speaker. The file may be played immediately to an associated speaker from the web interface for test purposes using the Play, Loop, and Stop buttons. The test tone will play on all three channels, but will not stream over multicast.

Test Speaker Volume

Set the associated speaker volume. This setting is an amplifier gain control and the output level will also depend on the levels recorded into the source audio file played from memory.

Page Speaker Volume

Speaker page volume control for SIP or multicast paging. This setting is an amplifier gain control and output level will depend on streaming level. This setting will apply to all multicast, regardless of content.

Page Mode

A call to the SIP page extension can be one-way or delayed. In delay mode, the adapter will store the page into memory and then play after disconnect.

In delay mode, press “*” to cancel a page while the recording state is in process to prevent it from being sent after hanging up.

Page Timeout

A time limit may be set for an active page.

Page Tone

Select pre-announce tone for paging. Use only Default, or custom uploaded file. The other pre-installed tone files all contain silence at the end in order to generate ring "cadence" of 6 seconds. This silence will block the voice path for several seconds at the start of a page. The “Default” tone will play the page-notif.wav file.

Note

The “Default Page Tone”, in Advanced Multicast, will play the tone set here.

G.722 Support

Enable or disable the G.722 codec.

Automatic Gain Control (AGC)

Normalizes the audio level. This ensures audio level heard at the speaker is always at a consistent level, independent of the phone that is used to answer the call.

Output Level

The following output levels are available, allowing the 8373 to interface with a wide variety of devices:

Basic Settings Tab – Channels

Select multicast zone(s) to play the audio on for each channel. A channel may be associated with any number of zones.

Note

If Poly Mode is enabled in the Basic Settings → Multicast tab, Poly groups can be selected for each channel.

Number of Zones

Select “basic” zones if configuring nine or fewer multicast zones or “expanded” to configure up to 50 zones. The expanded zones have the same behaviour as the basic Receiver zones, but are hidden by default to simplify the interface.

The 8373 Page Extension always supports DTMF input mode to select zone for activating the Relay Channels, even when in stand-alone with multicast disabled.

Speaker Playback Zones

Allows each Channels to play audio for selected zones only.

Basic Settings Tab - Multicast (Sender Settings)

Multicast IP Addresses

Each 8373 IP Zone Paging Adapter has its own IP address, and shares a common multicast IP and port number (multicast zone) for multicast packets. The Sender transmits to a configurable multicast zone, and the Receiver units listen to all the multicast zones assigned to them.

The network switches and router see the packet and deliver it to all the members of the group. The multicast IP and port number must be the same on all the Sender and Receiver units of one group. The user may define multiple zones by picking different multicast IP addresses and/or port numbers.

1. Multicast IP addresses range: 224.0.0.0/4 (from 224.0.0.0 to 239.255.255.255)

2. Port numbers range: 1 to 65535

3. By default, the 8373 IP Zone Paging Adapter is set to use the multicast IP address 224.0.2.60 and the port numbers 50000-50008

Make sure that the multicast IP address and port number do not conflict with other services and devices on the same network.

Multicast Page Zones

The 8373 IP Zone Paging Adapter supports nine “basic” multicast zones. These zones are defined by the multicast IP addresses.

Somewhat arbitrarily, these zones are defined below but may be used in other ways. The important consideration is that there is a priority hierarchy – streaming activity on a zone higher on the list, will be treated as a higher priority than a zone lower on the list – with music being the lowest priority.

1. Priority

2. All Call

3. Zone 1

4. Zone 2

5. Zone 3

6. Zone 4

7. Zone 5

8. Zone 6

9. 9.Music

“Expanded” zones can also be enabled, in the Basic Settings → Multicast tab, allowing up to 50 zones in total. These have the same behaviors as the basic zones, but are hidden by default to simplify the interface.

Basic Settings Tab - Multicast (Sender Settings)

Note

See (Advanced Settings → Advanced Multicast) section for more information on populated IP values.

Multicast Mode (Sender/Sender Selected)

If Sender is enabled the 8373 IP Zone Paging Adapter will broadcast an IP stream when activated in addition to playing the audio. (Note that the 8373 IP Zone Paging Adapter cannot be both a multicast Sender and Receiver simultaneously).

Number of Zones (Regular Multicast Type Selected)

Select “basic” zones if configuring nine or fewer multicast zones or “expanded” to configure up to 50 zones. The expanded zones have the same behaviour as the basic Receiver zones, but are hidden by default to simplify the interface.

Multicast Type

The 8373 IP Zone Paging Adapter may broadcast multicast paging, compatible with Poly ‘on premise group paging’ protocol and most multicast-enabled phones that use RTP audio packets.

Select ‘Regular’ if solely multicasting to Algo SIP endpoints and/or multicast-enabled phones.

To multicast page announcements solely to Poly phones, select “Poly Group Page” or “Push-to-Talk”. Then, configure the 8373 with the “Poly Zone” (IP Address and Port).

Note

Always ensure that the multicast settings on all Receivers match those of the Sender. Select “Regular RTP + Poly Group Page/Push-to-Talk” to multicast page audio to both Poly phones, Algo SIP endpoints, and multicast-enabled phones.

Basic Settings Tab - Multicast (Receiver Settings)

Multicast Mode (Receiver Selected)

If Receiver mode is enabled the 8373 will activate when receiving a multicast message. It will mimic the audio stream, but use local volume settings (‘Page Speaker Volume’ in Basic Settings → Features).

Number of Zones (Regular Multicast Type Selected)

Select “basic” zones if configuring nine or fewer multicast zones or “expanded” to configure up to 50 zones. The expanded zones have the same behaviour as the basic Receiver zones.

Multicast Type - Regular

Select “Regular” if solely multicasting to Algo SIP endpoint(s) and/or multicast-enabled phone(s) that use RTP audio packets.

Multicast Type – Poly Group Paging/Push-to-Talk

The 8373 may receive multicast paging compatible with Poly “on premise group paging” protocol.

To configure the 8373 as a Receiver to play Poly page announcements, select “Group Page” or “Push-to-Talk”. Then enter the Poly Zone (IP Address and Port) that matches the configuration of the Poly phones and Channels. The “Default Channel” is the target group in a Poly paging environment.

The Poly phone used as page audio source for the 8373, must be configured to use either the G.711 or G.722 audio codec. The Poly phone(s) must also be configured with the “Compatibility” setting (“ptt.compatibilityMode”) disabled in order for this codec setting to be applied.

If using a Poly phone as the Multicast Sender, a tone may be set for any of the 25 Poly Groups configured on the Algo device. If an Algo device is used as a Multicast Sender, a tone does not have to be set as the Algo Sender will provide its own tone.

Poly Group Tones can be set in Advanced Settings → Advanced Multicast tab.

Web Interface Additional Features

Additional Features Tab – More Page Extensions

Additional SIP extensions can be registered for each multicast zone that will be used. This allows the advantage of dialing directly to a zone without needing to enter DMTF (e.g. speed-dial keys can be used), but may require additional SIP licenses depending.

To configure additional page extensions (up to 50) click “Enable” beside the target extension and enter the Extension, Authentication ID, and Authentication password.

The 8373 will auto-answer any inbound calls received on these numbers and provide a voice paging path and multicast if configured. Note that only a single call can be active at a time.

Note

Some SIP phone systems may not support this feature if they limit the number of extensions that can be registed on a single device.

Web Interface Advanced Settings

Advanced Settings Tab - Network

Protocol

DHCP is an IP standard designed to make administration of IP addresses simpler. When selected, DHCP will automatically configure IP addresses for each 8373 IP Zone Paging Adapter on the network. Alternatively the 8373 IP Zone Paging Adapter can be set to a static IP address.

VLAN Mode

Enables or Disables VLAN Tagging. VLAN Tagging is the networking standard that supports Virtual LANs (VLANs) on an Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames. The standard also provides provisions for a quality of service prioritization scheme commonly known as IEEE 802.1p and defines the Generic Attribute Registration Protocol.

VLAN ID

Specifies the VLAN to which the Ethernet frame belongs. A 12-bit field specifying the VLAN to which the Ethernet frame belongs. The hexadecimal values of 0x000 and 0xFFF are reserved. All other values may be used as VLAN identifiers, allowing up to 4094 VLANs.

The reserved value 0x000 indicates that the frame does not belong to any VLAN; in this case, the 802.1Q tag specifies only a priority and is referred to as a priority tag. On bridges, VLAN 1 (the default VLAN ID) is often reserved for a management VLAN; this is vendor specific.

VLAN Priority

Sets the frame priority level. Otherwise known as Priority Code Point (PCP), VLAN Priority is a 3-bit field which refers to the IEEE 802.1p priority. It indicates the frame priority level. Values are from 0 (lowest) to 7 (highest).

802.1X Authentication

Credentials to access LAN or WLAN that have 802.1X network access control (NAC) enabled. This information will be available from the IT Administrator.

Differentiated Services (6-bit DSCP value)

Provides quality of service if the DSCP protocol is supported on your network. Can be specified independently for SIP control packets versus RTP and RTCP audio packets.

DNS Caching Mode

In “SIP” mode, only the results of DNS queries for SIP requests will be cached. In “All” mode, the results of all DNS queries will be cached.

Advanced Settings Tab – Admin

Password

Password to log into the 8373 IP Zone Paging Adapter web interface. You should change the default password algo in order to secure the device on the network. If you have forgotten your password, you will need to perform a reset using the Reset Button in order to restore the password (as well as all other settings) back to the original factory default conditions.

For additional password security see ‘Force Strong Password’ below.

Confirmation

Re-enter network admin password.

Device Name (Hostname)

Name to identify the device in the Algo Network Device Locator Tool.

Introduction Section on Status Page

Allow the introduction text to be hidden from the login screen.

Show Status Section on Status Page when Logged Out

Use this option if you wish to block access to the status page when logged out. The settings and configurations, on the status page, will be hidden entirely unless you’re logged in- this feature is useful when you want only trusted users to view possible sensitive device information.

Web Interface Session Timeout

Set the maximum period of inactivity after which the web interface will log out automatically.

Play Tone at Startup

A tone can be played at startup to confim that the device has booted. This can be useful when testing or configuring a device, but might not be desirable if the device is connected to an external amplifier and paging system.

Log Level

Use on the advice of Algo technical support only.

Log Method

Allows the 8373 IP Zone Paging Adapter to write to external Syslog server if the option for external (or both) is selected.

Log Server

If “Network” or “Both” is selected this is the address of the Syslog server on the network.

Web Interface Protocol

HTTPS is always enabled on the device. Use “HTTPS Only” mode to disable HTTP, then requests will be automatically redirected to HTTPS. Also note that since the device can have any address on the local network, no security certificate exists, and thus most browsers will provide a warning when using HTTPS.

Force Strong Password

When enabled, ensures that a secure password is provided for the device’s web interface for additional protection. The password requirements are:

• Must contain at least 10 characters

• Must contain at least 1 uppercase character

• Must contain at least 1 digit (0 – 9)

• Must contain at least 1 special character

Allow Secure SIP Password

Allows SIP passwords to be stored in the configuration file in an encrypted format, to prevent viewing and recovery. Once enabled, the SIP “Realm” field should be entered and all the configured Authentication Password(s) must be re-entered in the Basic Settings → SIP tab, and any other locations where SIP extensions have been configured, to save the encrypted password(s).

If the Realm is changed at a later time, all the passwords will also need to be re-entered again to save the passwords with the new encryption.

To obtain your SIP Realm information, contact your SIP Server administrator (or check the SIP log file for a registration attempt). The Realms may be the same or different for all the extensions used.

SNMP Support

Additional SNMP support is anticipated for future, but the 8373 IP Zone Paging Adapter will respond to a simple status query for automated supervision. Contact Algo technical support for more information.

System Integrity Checking

This feature verifies installed system packages to ensure they have not been tampered with by running ‘Perform Check’. Enabling this feature may cause reboots and upgrades to take 30 seconds longer. Verification results can be found on the Status page.

Advanced Settings Tab – Time

Network time is used for logging events into memory for troubleshooting.

Time Zone

Select time zone.

NTP Time Servers 1/2/3/4

The adapter will attempt to use Timer Server 1 and work down the list if one or more of the time servers become unresponsive.

NTP Time Server Source

When “Use DHCP Option 42” is chosen, if an NTP Server address is provided via the DHCP Option 42, that NTP Server will be used instead of the 4 mentioned above. Alternatively, “Ignore DHCP Option 42” can be chosen to only use servers mentioned above.

Device Date/Time

This field shows the current time and date as set on the device. If testing the device on a lab network that may not have access to an external NTP server, the “Sync with browser” button can be used to temporarily set the time on the device.

Note

This time value will be lost at power down, or overwritten if NTP is currently active. Time and date used only for logging purposes and are not typically required.

Advanced Settings Tab – Provisioning

Note

It is recommended that Provisioning Mode be set to Disabled if this feature is not in use. This will prevent unauthorized re-configuration of the device if DHCP is used.

Provisioning allows installers to pre-configure 8373 IP Zone Paging Adapter units prior to installation on a network. It is typically used for large deployments to save time and ensure consistent setups.

The device can be provisioned via the Auto mode (where all three DHCP options (Option 66/160/150) will be automatically checked for an active provisioning server), just one of the three specified DHCP options, or a Static Server. In addition, there are four different ways to download provisioning files from a “Provisioning Server”: TFTP (Trivial File Transfer Protocol), FTP, HTTP, or HTTPS.

For example, 8373 configuration files can be automatically downloaded from a TFTP server using DHCP Option 66. This option code (when set) supplies a TFTP boot server address to the DHCP client to boot from.

Note

DHCP must be enabled if using DHCP Option 66/160/150, in order for Provisioning to work.

One of two files can be uploaded on the Provisioning Server (for access via TFTP, FTP, HTTP, or HTTPS):

• Generic (for all 8373 Paging Adaptors) algop8373.conf

• Specific (for a specific MAC address) algom[MAC].conf

Both protocol and path is supported for Option 66, allowing for http://myserver.com/config-path to be used.

MD5 Checksum

In addition to the .conf file, an .md5 checksum file must also be uploaded to the Provisioning server. This checksum file is used to verify that the .conf file is transferred correctly without error.

A tool such as can be found at the website address below may be used to generate this file: http://www.fourmilab.ch/md5

The application doesn’t need an installation. To use the tool, simply unzip and run the application (md5) from a command prompt. The proper .md5 file will be generated in the same directory.

If using the above tool, be sure to use the “-l” parameter to generate lower case letters.

Generating a generic configuration file

1. Connect 8373 to the network.

2. Access the 8373 Web Interface Control Panel.

3. Configure the 8373 with desired options.

4. Click on the System tab and then Maintenance.

5. Click “Download” to download the current configuration file.

6. Save the file settings.txt.

7. Rename file settings.txt to algop8373.conf.

8. The file algop8373.conf can now be uploaded onto the Provisioning server.

   If using a generic configuration file, extensions and credentials have to be entered manually once the 8373 has automatically downloaded the configuration file.

Generating a specific configuration file

1. Follow steps 1 to 6 as listed in the section “Generating a generic configuration file”.

2. Rename file settings.txt to algom[MAC address].conf (e.g. algom0022EE020009.conf)

3. File algom[MAC address].conf can now be uploaded on the Provisioning server.

The specific configuration file will only be downloaded by the 8373 with the MAC address specified in the configuration file name. Since all the necessary settings can be included in this file, the 8373 will be ready to work immediately after the configuration file is downloaded. The MAC address of each 8373 can be found on the back label of the unit.

For more Algo SIP endpoint provisioning information, see: www.algosolutions.com/provision

Advanced Settings Tab – File Manager

Uploading Custom Audio Files

Custom audio files may be uploaded into memory (1 GB) to play for notification applications. Place your audio files into the tones directory.

An existing file may also be modified by downloading the original via the links in the web interface, making the desired changes, and then uploading the new version with a different name. Audio files must be in the following format:

• WAV format

• 8kHz or 16kHz sampling rate

• 16-bit PCM, or u-law

• Mono

• Smaller than 200MB

File names must be limited to 32 characters, with no spaces.

Tone Files Included in Memory

The 8373 IP Zone Paging Adapter includes several pre-loaded audio files that can be selected to play for various events. The web interface allows selection of the tone file and also the ability to play it immediately over the speaker for testing. Files may also be deleted or renamed.

Advanced Settings Tab – Advanced Audio

Dynamic Range Compression (DRC)

If enabled, compresses the dynamic range of page audio to increase loudness.

Dynamic Range Compression Gain

Higher compression gain increases distortion.

Jitter Buffer Range

The jitter buffer removes the jitter in arriving network packets by temporarily storing them. This process corrects the inconsistent delays on the network. It is recommended to use the lowest value.

Always Send RTP Media

If enabled, audio packets will be sent at all times, even during one way paging mode. This option is needed in cases when the server expects to see audio packets at all times.

Speaker Filter

Applies a high-pass filter to the speaker output. Used to reduce audio artifacts like humming or buzzing by filtering out unwanted frequencies.

Speaker Noise Filter

Enables heavy filtering below 145Hz to reduce mains induced noise (fans).

Advanced Settings Tab – Advanced SIP

SIP Transportation

Which transport layer protocol to use for SIP messages. Setting ‘SIP Transportation’ to ‘TLS’, ensures the encryption of SIP traffic.

SIPS Scheme

Only visible when ‘SIP Transportation’ set to ‘TLS’. Enabling SIPS Scheme requires the SIP connection from endpoint to endpoint to be secure.

SDP SRTP Offer

Setting ‘SDP SRTP Offer’ to ‘Optional’, means the SIP call’s RTP data will be left unencrypted if the other party does not support SRTP. Setting ‘SDP SRTP Offer’ to ‘Standard’, encrypts RTP voice data, meaning the normal audio RTP packets will now be secure (SRTP). This means SIP calls will be rejected if other party does not support SRTP.The ‘Standard’ option secures the audio data between parties, by making sure that it’s not left out in the open for third parties to later reconstruct and listen to.

SIP Outbound Support (RFC 5626)

Enable this option to support best networking practices according to RFC 5626. This option should generally be enabled if the Algo device is being registered with a hosted server or if TLS is being used for SIP Transportation.

Outbound Proxy

IP address for outbound proxy. A proxy (server) stands between a private network and the internet.

Register Period (seconds)

Maximum requested period of time where the 8373 IP Zone Paging Adapter will re-register with the SIP server. Default setting is 3600 seconds (1 hour). Only change if instructed otherwise.

Media NAT

IP address for STUN server if present or IP address/credentials for a TURN server.

Server Redundancy Feature

Two secondary SIP servers may be configured. The 8373 IP Zone Paging Adapter will attempt to register with the primary server but switch to a secondary server when necessary. The configuration allows re-registration to the primary server upon availability or to stay with a server until unresponsive.

If Server Redundancy is selected the web page will expand as shown below.

Backup Server #1

If primary server is unreachable the 8373 IP Zone Paging Adapter will attempt to register with the backup servers. If enabled, the 8373 will always attempt to register with the highest priority server.

Backup Server #2

If backup server #1 is unreachable the 8373 IP Zone Paging Adapter will attempt to register with the 2nd backup server. If enabled, the 8373 will always attempt to register with the highest priority server.

Polling Intervals (seconds)

Time period between sending monitoring packets to each server. Non-active servers are always polled, and active server may optionally be polled (see below).

Poll Active Server

Explicitly poll current server to monitor availability. May also be handled automatically by other regular events, so can be disabled to reduce network traffic.

Automatic Failback

Reconnect with higher priority server once available, even if backup connection is still fine.

Polling Method

SIP message used to poll servers to monitor availability.

Use Outgoing TLS port in SIP headers

Use ephemeral port number from outgoing SIP TLS connection instead of listening port number in SIP Contact and Via headers. This is useful to connect the device to some local SIP servers, like Asterisk or FreeSWITCH.

Do Not Reuse Authorization Headers

When enabled, all SIP authorization information from the last successful request will not be reused in the next request.

Allow Missing Subscription-State Headers

When enabled, allow SIP NOTIFY messages that do not contain a "Subscription-State" header.

Advanced Settings Tab – Advanced Multicast

Note

The settings on this tab are only visible when in Sender or Receiver multicast mode.

The default prepopulated multicast addresses above will work in most cases and should only be altered for rare cases.

Audio Sync (Receiver Mode)

When using multicast with other third-party devices that have a delay in their audio path, the audio on the 8373 may be heard slightly earlier than on these other devices. By addingaudio delay up to one second, the 8373 may be synchronized with other speakers or telephones that have greater latency. This feature applies to Multicast Receiver mode only.

Sender Output Codec (Sender Mode)

Audio encoding format used by the Sender device when sending output to the Receivers.

Sender Output Packetization Time (Sender Mode)

The size of the audio packets sent by the Sender to the Receivers. The default of 20ms is recommended, unless a different value is specifically required for compatibility with other devices.

RTCP Port Selection

Select the port on which RTCP packets will be sent or received. If using the 'Next Higher Port' option, ensure that the default multicast zone definitions are modified such that zonesare only assigned to even-numbered ports, leaving the next higher odd-numbered ports free for RTCP packets.

Zone Definition

The “Expanded” Receiver or Sender zones can be enabled/disabled in Basic Settings → Multicast. Default IP addresses and ports may be revised for any given zone in the table.

Note

Ensure that the Address and Port settings are the same for all Sender and Receiver devices.

Page Tone and Page Volume

Sender Mode: By default, the same tone can be set for all Receiver zones in the Basic Settings → Features tab. Unique paging tones may be revised for any given Receiver zone in the table above.

Receiver Mode: When an Algo device is the multicast Sender, a page tone will play on the Receiver device, so it is recommended to set the Receiver tone to “None”. If a page is received from a non-Algo device that doesn’t send a tone, a tone can be inserted on the Receivers (above) each time they detect page audio starting, allowing them to play a tone.

By default, the same page volume can be set for all Receiver zones in the Basic Settings → Features tab. Unique page volumes may be revised on a per-zone basis in the table above. For instance, emergency pages can be louder on certain Receiver speakers.

Poly Receiver Tones

Available if Multicast Receiver and “Poly Group Page” or “Poly Push-to-Talk” are selected in the Basic Settings → Multicast tab. A tone may be set for any of the 25 PolyGroups. If using an Algo device as a Multicast Sender, it is recommended to set the Receiver tones to “None” to avoid conflicts, as the Algo devices already multicast a tone by default.

Web Interface System

System Tab – Maintenance

Download Configuration File

Save the device settings to a text file for backup or to setup a provisioning configuration file.

Restore Configuration File

Restore settings from a backup file.

Restore Configuration to Defaults

Resets all 8373 IP Zone Paging Adapter device settings to factory default values.

Download Backup Zip File

Saves the device settings (configuration) and all the files in File Manager: certificates, licenses, and tones to a backup zip file.

Restore from Backup Zip File

Restores the device settings (configuration) and all the files in File Manager: certificates, licenses, and tones from a backup zip file.

Restore All Settings and Files to Defaults

Resets the device settings (configuration) and all the files in File Manager: certificates, licenses, and tones to factory default values.

Reboot the Device

Reboots the device.

Method

Specify whether the firmware files will be downloaded from the local computer or a remote URL.

Firmware Image

Point to the firmware image provided by Algo.

MD5 Checksum

Point to the checksum file provided by Algo.

How to upgrade the 8373 IP Zone Paging Adapter Firmware

1. From the top menu, click on System → Maintenance.

2. In the Upgrade section, click on Choose File and select the 8373 IP Zone Paging Adapter firmware file to upload. Note that both the FW firmware and MD5 checksum files must be loaded.

3. Click Upgrade.

4. After the upgrade is complete, confirm that the firmware version has changed (refer to top right of Control Panel).

System Tab – System Log

System log files are automatically created and assist with troubleshooting in the event the 8373 IP Zone Paging Adapter does not behave as expected.

FCC Compliance Statement

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy, and if it is not installed and used in accordance with the instruction manual, it may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at their own expense.