A-12 APPENDIX A: MODEM SPECIFICATION AND INTER FACE PIN ASSIGNMENTSPrivate Line Port Cable Pin AssignmentsEach modem on the communications card is equipped with a singlePrivate line port supporting either a 2- or 4-wire connection, which isaccessed via the appropriate PRIVATE LINE socket on the card’s interfacemodule (refer to the rear panel diagram in Section 1.2 for an exactreference of which socket services which modem on thecommunications card). This is an RJ11 type socket, that would typicallybe connected to a 2- or 4-wire private line outlet using a cableconforming to the wiring diagram shown below :
