Installing the InformaCast Enabled Paging Adapter
Restore the Factory Default Settings
Operations Guide
931767B
CyberData Corporation
44
2.5.8.1 Assigning Priority
When playing multicast streams, audio on different streams will preempt each other according to
their priority in the list. An audio stream with a higher priority will interrupt a stream with a lower
priority.
If both SIP and Multicast is enabled, SIP audio streams are considered priority
4.5
. SIP audio will
interrupt multicast streams with priority
0
through
4
and will be interrupted by multicast streams with
priority
5
through
9
.
Note
SIP calls, multicast streams, ring tones, ringback tones, and nightring tones are all
prioritized.
Ringtones and
Nightringtones
Ringtones all play at the same priority level. This means that it is possible to have a nightring tone
and a normal ringtone playing at the same time.
2.5.8.2 Polycom Paging
Page your entire paging infrastructure, including legacy analog paging systems, using Polycom IP
phones and a CyberData SIP Paging Adapter. Simultaneously paging your IP phones and overhead
speakers can be as simple as pressing the Paging soft key on a Polycom IP phone.
The Polycom Paging feature is supported on Polycom IP phones using UC Software 4.0.0 and
higher. The Polycom paging feature operates in two modes: Push-to-Talk (PTT) and Group Paging.
Only Group Paging mode pages are supported by the SIP Paging Adapter.
Polycom phones use the same multicast IP address and port number for both PTT and Group
Paging multicasts. Make sure to note the Polycom multicast IP address and port number before
configuring the CyberData SIP Paging Adapter. Polycom phones use a default multicast IP address
of 224.0.1.116 and odd-numbered port 5001.
While the same multicast IP address and port number is used for all Polycom pages in both modes,
Polycom uses numbered "groups" or "channels" to differentiate between each paging group. Each
"group" or "channel" is numbered 1 through 25.
The SIP Paging Adapter can subscribe to Group Numbers 1 through 25 for Group Paging one-way
audio pages. You may configure up to three group numbers or "channels", which are labeled
on the
. Each of the three available channels can be disabled.
It is important to note the SIP Paging Adapter assigns a priority to each multicast group, as
referenced in
Section 2.5.8.2, "Polycom Paging"
. Polycom priority assignments by channel are
ignored.
When configuring Polycom phones for their Group Paging feature, be sure the following settings are
configured:
•
Payload Size = 20 ms (milliseconds)
•
Codec = G.711Mu
The SIP Paging Adapter supports Polycom Group Paging multicasts that are G.711Mu encoded with
a payload size of 20 ms.
Use the following steps to configure Polycom Group Paging on the SIP Paging Adapter:
1. Identify the Polycom multicast IP address and port number used by the Polycom phones.
