ZyXEL Communications 2864 Series User Manual page 247

PHONE JACK PIN ASSIGNMENTS
Most models of the ZyXEL 2864 modem series feature two RJ11 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:
The signals A and A1 are used with the KTS (Key Telephone System). They may or
may not be supported depending on the jumper option in the modem. For the
rack-mount model, the line terminals are located on the backplane of the rack chas-
sis. The model 2864L 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.
Appendix B
1
2
3
4
Transmit Signal (R1)
Transmit Signal(T1)
not connected
not connected
not connected
not connected
Receive Signal(T)
Receive Signal(R)
B–1
A
RING
TIP
A1