Tam Interface Section - Panasonic KX-FLB758RU Service Manual

KX-FLB758RU
8.7.1.5.

TAM INTERFACE SECTION

1. Function
If EXT. TAM is selected in the Receive mode, the unit receives documents for FAX calls or the external TAM records a voice
message automatically.
To switch between the answering machine and facsimile in the EXT. TAM Mode.
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1 When the bell signal rings as many times as the number
memorized into the connected answering machine (TAM),
the answering machine is connected to the line and the
answering message is sent out to the line. (OGM out for 8
~ 16 sec.)
2 After sending the OGM, the answering machine starts to
record the message of the other party (ICM recording).
2. Circuit Operation
The TAM INTERFACE circuit consists of CNG signal from the other party's detection circuit and RY202 (to separate EXT.
TAM).
a. CNG signal detection circuit
The CNG signal from the other party's FAX is detected in ASIC IC604 via CODEC(IC609) (digital board).
(Signal path)
Refer to CHECK SHEET(P.137).
b. Remote receiving
This is the parallel-connected DTMF signal for the TEL or EXT.TEL mode between T and R. When the other party is a FAX,
the unit switches to FAX receiving.
(Signal Path)
Detects the DTMF signal in the MODEM.
EXTERNAL TAM OPERATION UNIT OPERATION
The length of the answering message should be 8~16
seconds.
While the message is being played, the unit starts to
detect the CNG signal.(A)
If the unit detects the CNG signal, it will switch to FAX
receiving and disconnect the external TAM automatically.
If the unit detect the CNG signal or the unit will disconnect
the line. (C)
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