AT&T System 85 manual 265

8410 Voice Terminal

Distance Limitations

The following circuit packs can be used with all of the 8400-Series sets.

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

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

The 8410 voice terminal receives power from the system and does not require any external power supply. Additional external power IS required when the 8410 voice terminal is equipped with any adjuncts, such as an external speakerphone. In this instance, an MSP-1 Power Supply is recommended. Refer to the Adjunct Power section of this manual for information on the MSP-1 Power Supply.

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