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4.9.3 Receiving PSTN call, sending acknowledge back
(ACK BQ)
1. The following display appears when a PSTN call is received.
Able acknowledge
call in progress!
TIME TO GO: 8S
TO COAST :
001234567
TEL NO. : 1234567890123456
TELEPHONE CH 12001
DSC FREQ :
12577.5 KHZ
2. The timer counts down to zero and the following display appears.
Pick up the handset
or press CALL key.
TIME TO GO: 60S
FROM COAST :
001234567
TEL NO. :
1234567890123456
TELEPHONE CH 12001
DSC FREQ :
12577.5 KHZ
PSTN call canceled.
Try calling again.
FROM COAST :
001234567
TEL NO. :
1234567890123456
TELEPHONE CH 12001
DSC FREQ :
12577.5 KHZ
RE-SEND
3. Pick up the handset or press the [CALL] key within one minute. (If this not done within one
minute the call is canceled, displaying the message “PSTN call canceled. Try calling again.”.
Press the [ENT] key to call followed by the [CALL] key to re-send the call.)
PSTN connection
call in progress!
TIME TO GO: 7S
TO COAST :
001234567
TEL NO. : 1234567890123456
TELEPHONE CH 12001
DSC FREQ :
12577.5 KHZ
4. When the timer counts down to zero the following message appears.
Waiting for
acknowledgement.
TIME TO GO: 25S
DSC FREQ :
12577.5 KHZ
FROM COAST :
001234567
TEL NO. :
1234567890123456
TELEPHONE CH 12001