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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
The 8400 Series Voice Terminals
12-64The 8411 Voice Terminal
12
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.
Distance Limitations
The following circuit packs can be used with all of the 8400-Series sets.
In 4-wire operation, the voice terminal must be within 5,000 feet of the PBX using
22-gauge or 24-gauge wire, and within 4,000 feet of the PBX using 26-gauge wire.
In 2-wire operation, the voice terminal must be within 5,500 feet of the PBX using
22-gauge wire, within 3,500 feet of the PBX using 24-gauge wire, and within 2,200
feet of the PBX using 26-gauge wire.
Power Requirements
In order for the 8411 voice terminal to operate, the voice terminal must have
auxiliary power, either locally using an 1151A1 power supply or 1151A2 power
supply with Battery Holdover or remotely using an 1145B1 closet supply. Refer to
the Adjunct Power section earlier in this manual for information on these power
supplies.
Table 12-21. Circuit Packs Used with the 8400-Series Voice Terminals
Circuit Pack 2/4-Wire Will support these switches
TN2181 - 16-port 2-wire G3V3, G3V2
TN754b - 8-port 4-wire All switches except System 85
TN754 - 8-port 4-wire All switches except System 85
TN413 - 8-port 4-wire International System 75
SN 270 and SN
270B - 4-port
4-wire System 85 R2V2 - R2V4