PTT and Hook Interactions for Group Calls
The table lists the available PTT and Hook interactions for Group calls.
Table 34: PTT and Hook Interactions for Group Calls
Active Audio
Routing
Event Next Audio Routing
Any accessory
with hook signal
GCAI active accessory is placed
on hook.
If Accessories Options is enabled by
your service provider, audio routing shall
follow 'Group Call' in Table 33: Audio
Routing Schemes on page 154.
7
8
TELCO active accessory is
placed ON hook.
If Accessories Options is enabled by
your service provider, audio routing shall
be routed through the hands-free micro-
phone on the RAC and the associated
external speaker.
An inactive handset is placed on
hook.
Audio routing shall follow Table 33: Au-
dio Routing Schemes on page 154.
Any PTT from any handset placed on
hook.
Receiving audio shall be routed to the
external speaker associated with the
same control head as the handset and
no microphone will be opened.
7
8
9
PTT from any handset taken off
hook or from any other accessory
(independent of hook state).
Audio routing shall follow 'Group Call' in
Table 33: Audio Routing Schemes on
page 154.
PTT through AT commands. Audio routing shall follow 'Using AT com-
mands (virtual PTT)' in Table 33: Audio
Routing Schemes on page 154.
Any handset is taken off hook.
• Radios with Dual Control Head or
Multi Radio Control features enabled:
- Audio routing shall follow 'Group
Call' in Table 33: Audio Routing
Schemes on page 154.
• Others:
- To another handset if the other
handset is a GCAI (receiver or re-
ceiver-transceiver) handset.
- Else, audio routing shall follow
'Group Call' in Table 33: Audio
Routing Schemes on page 154.
7
Press PTT to transmit.
8
For radios with Dual Control Head feature enabled only. The Key Press Token rules apply
when PTT pressed is associated with the other control head than the current active accessory
is associated with.
9
The associated external speaker state (On / Off) shall not be changed. If the speaker is disa-
bled, receiving audio will not be heard. The state of the external speaker can be toggled On or
Off at any time by pressing the Speaker On / Off button.
68015000585-MF
Appendix D: Audio Routing and PTT Hook Interactions
157
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