Multicast Paging (SIP)

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Multicast Paging enables IP intercom stations in SIP mode to receive VoIP audio multicast paging from 3rd party iPBX (e.g. Asterisk). This feature is supported by both INCA stations and Turbine stations. Up to 10 different Multicast paging groups can be defined.

Multicast Paging is supported in SIP mode only

To configure a station to receive Multicast Paging: Log into the IP Station and select SIP Configuration > Multicast Paging:

Configuration page for Multicast Paging

• Enable Multicast paging: When enabled, the station is capable of playing audio received as Multicast
• Enable Order Priority:
  • Enabled: If the station is exposed to two (or more) multicast VoIP streams at the same time, and the VoIP streams have the same priority, the VoIP stream with the highest "Order" number will be played.
  • Disabled: The "Order" number will be ignored. If the station is exposed to two (or more) multicast VoIP streams at the same time, and the VoIP streams have the same priority, the first received VoIP stream will be played. Subsequent VoIP streams will not be played.

• Label: Any descriptive text
• Listening Address: The multicast IP address that the station shall liten to, e.g. 239.195.124.240. Multicast IP addresses are defined to be in the range from 224.0.0.0 to 239.255.255.255.
• Port: The port number must be within the port range 61020-61250, recommended range is 61080-61250. Using odd number for port is not recommended.
• Codec: Select between codecs G.711a, G.711u, G.722 and G.729
• Priority: Select which priority mechanisms should apply to this multicast VoIP stream. Options are LOW, NORMAL, HIGH (default), and EMERGENCY. See more details below.
• Order: If "Enable Order Priority" option is enabled, then the paging with same priority but higher order number gets playback priority.

Order number 1 has the highest priority, 10 has the lowest priority.

The Tone Test retries automatically (after 0.5 seconds) with higher volume if the first tone test fails. It will increases tone volume max 2 steps from the configured tone volume. A SNMP trap stating that the tone test failed will only be sent if the tone test fails with higher tone volume.