ZyXEL Elite 2864 User Guide - Page 247
Appendix B
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Appendix B 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: 1 A 2 RING 3 TIP 4 A1 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 chassis. 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 Transmit Signal (R1) 2 Transmit Signal(T1) 3 not connected 4 not connected 5 not connected 6 not connected 7 Receive Signal(T) 8 Receive Signal(R) 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. B-1