Spectralink 84-Series Series Wireless Telephones Administration Guide
1725-86984-000_P.docx
September 2016
157
The Push-to-talk (PTT) feature is a collaborative tool that enables users to exchange radio
broadcasts to other users subscribed to a PTT
channel
. In PTT mode, the handset behaves
like a walkie-talkie; users can broadcast audio to a PTT channel and recipients subscribed to
that channel can respond to your message. PTT broadcasts can be transmitted using the
handset, headset, or speakerphone. They can be rejected, placed on hold and ended at any
time. PTT broadcasts can be received on the speakerphone, handset, and headset.
Administrators must enable Paging and PTT before users can subscribe to a page group or PTT
channel. You can enable one of these features or you can operate both simultaneously. Paging
and PTT each have 25 groups/channels you can enable.
Note that you can enter a display name for sent PTT broadcasts in
ptt.displayName
and for
sent page announcements in
ptt.pageMode.displayName
.
Web Info: Using a Different IP multicast address
The Push-to-talk and Group Paging features use a IP multicast address. If you
want to change the default IP multicast address, ensure that the new address does
not already have an official purpose as specified in the
Push-to-talk
You specify the same IP multicast address in the parameter
ptt.address
for both PTT and
Paging mode. PTT administrator settings are located in the
site.cfg
template file. PTT channels
settings are located in the
features.cfg
template file.
Tip: Compatibility With Earlier/Later Spectralink Handsets
You can configure the PTT feature to be compatible with the earlier Spectralink
8020 and 8030 Series Wireless Handsets by setting the
ptt.compatibilityMode
parameter to ‘1’. If you are deploying Spectralink 87-
Series handsets and need to maintain PTT compatibility, this parameter must be
set to 0 as the 87-Series handset does not support the G.726 codec.
Table 8-45: Enable Push-to-talk
Parameter
Permitted Values
Default
ptt.pttMode.enable
0 or 1
0
If 0, push-to-talk is disabled. If 1, push-to-talk is enabled.
ptt.address
multicast IP address
224.0.1.116
The multicast IP address to send page audio to and receive page audio from. Use default.