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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.
4.3
Multicast Overview
The 8410 IP Display Speaker is a multicast receiver and is able to receive IP audio multicast messages over the network
to support larger deployment for both paging and notification. This provides a scalable and efficient method of
building large scale notification solutions.
An Algo 8301 IP Paging Adapter & Scheduler can be configured with a SIP Page Extension to multicast to the 8410 IP
Display Speaker. When called from a phone, the SIP registered 8301 will auto-answer and play the page audio over the
8410/8420 speaker.
Simultaneously, the registered 8301 endpoint broadcasts the audio over the network using RTP multicast to any
number/combination of Algo IP display speakers, speakers, visual alerters, and paging adapters as required.
Receiver endpoints require a PoE network connection but do not require registration to the communication server.
Multicasting can also be used to distribute loud ring or other alerting (e.g., safety, security, or emergency events) over
multiple Algo endpoints (e.g., 8190, 8196, 8188, 8186, 8128, 8201, 8301, and 8373).
4.3.1 SIP Paging: Multiple 8410s (Using Multicast)
To use the multicast feature, set up an 8410 IP Display Speaker as the Multicast Transmitter.
The Sender device will page normally while simultaneously streaming audio to the Receiver speakers (such as the
8410/8420). The Receiver speakers do not require SIP extensions and do not need to register with the SIP
Communication Server.
To enable multicast streaming from the 8301 IP Paging Adapter & Scheduler, go to the web interface of the device and
navigate to the Basic Settings → Multicast tab. Choose multicast mode 'Sender' and zone 'All Call'. The multicast
addresses pre-populated in the table, under Advanced Settings → Advanced Multicast, will work in most cases and
should only be altered for rare cases.
To enable multicast monitoring in the 8410 IP Display Speaker, go to the web interface for reach device and navigate
to Basic Settings → Multicast. Choose multicast mode 'Receiver'. There is no need to select a zone as the speaker will
automatically monitor the 'All Call' zone IP address.
The page pre-announce tone is generated from the Sender. The following options are valid for each multicast
Receiver:
•
Increase or Decrease Speaker Volume
•
Enable Ambient Noise Monitoring (speaker volume adapts to background noise)
4.3.2 SIP Paging: Multiple Display Speakers (Using Individual SIP extensions)
In some cases, it may be desirable for every speaker to have a SIP extension. Multicast may still be used to page
multiple speakers, but each speaker can also be called individually or generate a call when appropriately configured.
AL061-UG-GP258410-001-R0
8420 IP Dual-Sided Display Speaker
support@algosolutions.com
8410 IP Display Speaker &
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