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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
The 8400 Series Voice Terminals
12-25The 8405B, 8405B Plus, 8405D, and 8405D Plus Voice Terminals
12
Wiring Information
The 8405 voice terminal works in both 4-wire and 2-wire DCP configurations. The
table below describes the pins on an 8400-Series voice terminal LINE jack.
NOTE:
Regardless of which configuration is in use, ALL wiring between the PBX
and the terminal MUST consist of twisted-pairs, including the modular line
cord. The line cord must be a D8W, which consists of 4 twisted-pairs, or a
Lucent Technologies-approved equivalent.
Twisted-pair wiring is used to make lines less sensitive to crosstalk.
Therefore, failure to use twisted pair wiring may result in less-than-optimum
performance of the terminal and may contribute to problems with the line.
An 8-wire modular cord MUST be used for all 4-wire and any 2-wire
installations requiring auxiliary power.
NOTE:
You do NOT need to change any settings on the voice terminal for 2-wire or
4-wire installations. The voice terminal is able to detect whether it is in a
2-wire or a 4-wire configuration.
For 2-wire operation, if you need to plug the voice terminal into a 4-pin or
6-pin wall jack, instead of a standard 8-pin modular jack, refer to the “Line
Interface” table to insure that the wires from the 4-pin or 6-pin wall jack are
connected to the correct pins on the terminal “LINE” jack.
Table 12-6. The Pins on an 8400-Series Voice Terminal LINE Jack
Line Interface
Pin Pair Name Description
1 2 OD1 4-Wire Output
2 2 OD2 4-Wire Output
3 3 ID1 4-Wire Input
41 U-T2-Wire(Tip)
5 1 U-R 2-Wire (Ring)
6 3 ID2 4-Wire Input
7 4 P1- Adjunct Power -48V
8 4 P2+ Adjunct Power Common