Telenetics RM16M - Versatile Rack Mounting Chassis, Installation And Operation Manual, Page: 43 / 49

Page 43
Appendix D
Telephone Line Cables
Table D-1 lists the functions of the modular jacks on the back panel of
the Data Shelf. The figures that follow Table D-1 show typical
telephone-line cable configurations. The last two figures show DDS
cable configurations.
Table D-1. Modular Jack Pin Functions
TELCO Jack TELSET/LL Jack
Pin Function Pin Function
1
2 R
T
}
Xmit pair of DDS
modems. Not used on
other type modems 1
2 Xmit pair (Dial backup modems
only)
3 R1/MI Receive ring for leased
line modems. Mode
indicator for dialup
modems. 3 Not used
4 R Ring – dial or leased 4 Not used
5 T Tip – dial or leased 5 Not used
6 T1/
MIC
Receive tip for leased
line modems. Mode
indicator common for
dialup modems 6 Not used
7
8 PR
PC
}
Programmable resistor
connections for dial
network modems. 7
8 Rec pair (Dial backup modems
only)
7
8 T 1
R1
}
Rec pair for DOS type
modems.