AT&T 8403 User's Guide download pdf (Page 18)

Installing Your Voice Terminal

the terminal or can cause the PBX line circuit card to remove power to the

terminal. All interconnections between these pairs MUST BE REMOVED

BEFORE the 8400-Series terminals are connected to the jack.

Auxiliary Power

In both a 4-wire or 2-wire configuration, most of the 8400-Series voice terminals

are phantom powered from the PBX. However, you will need auxiliary power in

the following instances:

If you are using an 8411 or 8434DX voice terminal

NOTE:

You

must

use auxiliary power with these sets.

If you have an 801A Expansion Module connected to an 8434DX voice

terminal (This expansion module can ONLY be used with the 8434DX

connected to a DEFINITY G3V3.3 or later switch.)

NOTE:

If an 8434DX voice terminal with attached adjunct equipment is

connected to an expansion module, it should be locally powered by

an MSP-1. If this configuration is closet powered by an 1145A,

two ports must be used. A KS-22911 L2 cannot be used in this

situation.

If there is attached adjunct equipment, such as an S201A Speakerphone,

to any of the 8400-Series voice terminals

For a list of possible auxiliary power supplies, see ‘‘Auxiliary Power Supplies for

the 8400-Series Voice Terminals’’ earlier in this manual.

Distance Limitations

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 (1676.4 meters) of the PBX using 22-gauge wire, within

3,500 feet (1066.8 meters) of the PBX using 24-gauge wire, and within

2,200 feet (670.56 meters) of the PBX using 26-gauge wire.

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AT&T 8403 User's Guide Page 18