Panasonic KX-FT982LS-B Service Manual page 41

6.7.7. Calling Line Identification Circuit (DTMF)
1. Function
This unit is compatible with the Caller ID service offered by your local telephone company. To use this feature, you must sub-
scribe to a Caller ID service. The data for the Caller ID from the telephone exchange is sent before the first ring signal. The
data from the telephone exchange is sent by DTMF signal.
2. Circuit Operation:
The Caller ID signal from TEL LINE is processed with MODEM (IC5).
Refer to Check Sheet for Signal Route (P.115) for the route of Caller ID (DTMF) signal.
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KX-FT982LS-B / KX-FT984LS-B / KX-FT988LS-B