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V.3600 B-1
Appendix B
Phone Jack Descriptions
DIAL Pin Functions
The DIAL jack connects to the PSTN dial-up lines. Pin functions are as
follows:
TELSET/LEASED LINE Pin Functions
The 8-pin TELSET/LEASED LINE jack allows a standard telephone or a
leased line to be connected to the modem. Pin functions are as follows:
Pin Function
1, 2, 3 Not used
4 R Ring side of telephone line
5 T Tip side of telephone line
6, 7, 8 Not used
Pin Function
1, 2 Transmit pair - 4-wire leased line or Tx and Rx for 2-wire
leased line
4, 5 Ring and tip (respectively) of telephone line for a telephone
7, 8 Receive pair - 4-wire leased line