netsys NH-300SP User Manual page 21

A.2 Telephone wire
Standard telephone wire of any gauge or type-flat, twisted or quad is used to connect the Modem to the telephone network.
A telephone cable typically consists of three pairs of wires, one of which is used for transmission. The connector at the end
of the telephone cable is called an RJ-11 connector and it consists of six pins. POTS (plain old telephone services) use pins
3 and 4 for voice transmission. A telephone cable is shown below.
The A and B connectors on the rear of the Modem are RJ-11 connectors. These connectors are wired identically. The
RJ-11 connectors have six positions, two of which are wired. The Modem uses the center two pins. The pin out
assignment for these connectors is presented below.
NH-300SP 2Ethernet HPNA Modem USER'S MANUAL Ver. A.7
A
B
Figure A-4 Telephone cable
(Table A-2)
Table A-2 RJ-11 Pin out Assignments
Pin# MNEMONIC
1 NC
2 NC
3 TIP
4 RING
5 NC
6 NC
20
(Figure A-4)
FUNCTION
Unused
Unused
POTS
POTS
Unused
Unused_