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Telephone Pin Designations
Issue 10 June 2005 117
Telephone Pin Designations
Table 22 provides port circuit pack and telephone pin designations.
Table 22: Port Circuit Pack and Telephone Pin Designations
Pin on
Modular
Plug
4-wire;
302D,
8400-Series,
603E, 9403,
9434
2-wire; 302D,
8400-Series,
603E, 9403,
9410, 9434
8510T BRI
(with
adjunct
speaker
phone)
Analog Station,
Modem
Z3A1 & Z3A2
ADU, Data
Module
1TXT TXT
2 TXR T TXR
3 PXT TXT R PXT
4 T PXR
5 R PXT
6 PXR TXR PXR
7 -48VDC (-48VDC) (-48VDC)
8GRD GRD GRD
circuit
pack
4-wire digital
(8 port)
2-wire digital
(16 or 24 port)
4-wire BRI
Trunk Side
Analog line (16
or 24 port)
Data Line
PX PBX transmit T Tip (A)
TX Terminal transmit R Ring (B)