Transmit time-out, Minimum duration transmission – GAI-Tronics CB193-001 Call Boxes User Manual

Page 25

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Pub.: 43004-031E

Model CB193-xxx, CB194-xxx, and CB195-xxx RF Call Boxes

Page

24 of 52

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Transmit Time-Out

Step Action

Response

1

User presses PTT button

Call Box wakes from low-power sleep mode, checks transmit
channel activity, and the status lamp lights red to indicate unit is
operating in RX mode.

2

No transmit channel
activity detected

Call Box keys radio and transmits ANI code.

3 ANI

transmission

complete

Call Box emits a “go-ahead” splash tone over the speaker or
handset receiver, and the status lamp lights green as a signal to
talk.

4

User speaks into the
microphone

Call Box transmits audio over the radio while timing the transmit
duration.

5

Maximum transmit time
reached

Call Box un-keys the radio, the status lamp is off, and it emits a
“transmission-terminated” tone over the speaker or handset
receiver. The user must now release and repress the PTT button in
order to continue transmission.

6

User releases PTT button

Call Box proceeds as in steps 2 through 7 in “Normal Use” section.

Minimum Duration Transmission

Step Action

Response

1

User presses and releases
the PTT button
(momentary activation)

Call Box wakes from low-power sleep mode, checks transmit
channel activity, and the status lamp lights red to indicate a “wait”
period.

2

No transmit channel
activity detected

Call Box keys radio and transmits ANI code.

3 ANI

transmission

complete

Call Box emits a “go-ahead” slash tone over the speaker or handset
receiver, and the status lamp lights green as a signal to talk.

4

User speaks into the
microphone

Call Box transmits audio over the radio while timing the transmit
duration.

5

Minimum transmit time
reached

Call Box un-keys the radio, the status lamp is off, and it emits a
“transmission-terminated” tone over the speaker or handset
receiver. The user must now press and hold the PTT button in
order to continue transmission.

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