Using Ptt Mode - Iridium Extreme PTT User Manual

Using PTT Mode

There are two basic operating states in PTT Mode:
PTT Home State, which allows you to listen for activity on one
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talkgroup. You may select or re-select this Home Talkgroup at any
time.
PTT Scan State, which allows you to listen for activity on any of the
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talkgroups for which your device is provisioned. The scan operation
samples the audio of the active talkgroup for a preselected period of
time (see Scan Period on p. 216 for selection) and then plays audio for
the next active talkgroup until all of the active talkgroups have been
sampled. When this process is complete, the cycle repeats. Newly
active talkgroups are then added to your scan list and new inactive
talkgroups are removed from the scan list.
Initiating a Talkgroup Session
If a talkgroup for which your device is provisioned is not active, you may
start a new session by pressing and holding the PTT Button while the
target talkgroup is the Home Talkgroup. By doing this, you are requesting
to have the floor for that talkgroup. Your display shifts from IDLE to
TALKING and the Talk Tone (a series of three ascending notes in rapid
succession) is played. If you are not granted the floor (e.g., if someone
else just requested that the same talkgroup be started), your screen
displays the text "Request Denied" and plays the Reject Tone (two notes
descending in rapid succession).
Once the talkgroup floor is granted, audio from your TALKING device is
transmitted to all participants on the talkgroup session. Press and hold the
PTT Button while you are speaking to continue the transmission to others
on the talkgroup.
Requesting the Floor and Speaking in an Active Talkgroup Session
If a talkgroup is active and you are not the talker (e.g., your device is
LISTENING or OPEN), you may request the floor by pressing and holding
the PTT Button while the target talkgroup is the Home Talkgroup. Your
display shifts from IDLE to TALKING and the Talk Tone (a series of three
ascending notes in rapid succession) is played. If you are not granted
the floor (e.g., if someone else is talking on the target talkgroup, or
someone else just requested the floor for the target talkgroup), the device
displays the text "Request Denied" and plays the Reject Tone (two notes
descending in rapid succession).
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