Connector Pinouts; Phone Jack Pinouts - ZyXEL Communications U-336S User Manual

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Connector Pinouts

Phone Jack Pinouts

The ZyXEL U-336S modem features two RJ-11 phone jacks, one
for the dial-up line connection (LINE) and one for an optional
connection to a telephone set (PHONE). The signals on these pins
are:
1
2
3
4
The signals A and A1 are used with KTS (Key Telephone System).
Your modem also features a leased line jack. This jack is an 8-pin
JM8 type jack. The signals on its pins are:
1
2
3
4
5
6
7
8
A 4-wire leased line connection uses pins 1 and 2 for transmission
and pins 7 and 8 for reception. 2-wire leased line connections use
pins 1 and 2 for both transmission and reception. Close to the
leased line jack on the circuit board are four jumper positions.
142 Connector Pinouts
A
RING
TIP
A1
Transmit Signal (R1)
Transmit Signal(T1)
not connected
not connected
not connected
not connected
Receive Signal(T)
Receive Signal(R)