Filter
Top Products
DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
The 8400 Series Voice Terminals
12-7The 8403 Voice Terminal
12
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 also 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.
In order for the terminal to function properly in either 2-wire or 4-wire
installations, there must be NO INTERCONNECTIONS between the wire
pairs used for 2-wire and 4-wire operations. Bridging or paralleling of these
pairs can result in damage to the terminal or can cause the PBX circuit pack
to remove power to the terminal.
REMOVE ALL CONNECTIONS BETWEEN PAIRS BEFORE
CONNECTING THE TERMINAL.
4-WIRE installations MUST ONLY have PBX connections on pair 2 and pair
3 and, if necessary, auxiliary power must be connected to pair 4.
2-WIRE installations MUST ONLY have PBX connections on pair 1 and, if
necessary, auxiliary power must be connected to pair 4.
6 3 ID2 4-Wire Input
7 4 P1- Adjunct Power -48V
8 4 P2+ Adjunct Power Common
Table 12-1. The Pins on an 8400-Series Voice Terminal LINE Jack
Line Interface
Pin Pair Name Description