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Cable DiagramsPassport 4400 Hardware Installation Manual
A-18
Figure A-16. 120 ohm Straight Cable
Figure A-17. Cable NTML79AA - Modular Straight Cable
Tw is t ed
Pair
Tw is t ed
Pair
To E1
Voice Module
To PBX
or PSTN
DB-9 Connector
(Male)
DB-15 Connector
(Female)
Tip 1 (T1) 1 1 Tip (T)
Ring 1 (R1) 6 9 Ring (R)
Tip (T) 3 3 Tip 1 (T1)
Ring (R) 8 11 Ring 1 (R1)
Ring (R) 1 1 Ring 1 (R1)
Tip (T) 2 2 Tip 1 (T1)
Ring 1 (R1) 4 4 Ring (R)
Tip 1 (T1) 5 5 Tip (T)
To T1 InterfaceTo T1
Voice Module
RJ-48C
(Male)
RJ-48C
(Male)