Distance Limitations; Power Requirements - AT&T Callmaster Series Reference Manual

Distance Limitations

The following circuit packs can be used with all of the 8400-Series sets.
Circuit Pack
TN2181 - 16-port
TN754b - 8-port
TN754 - 8-port
TN413 - 8-port
SN 270 and
SN 270B - 4-port
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.
2/4-Wire Will support these switches
2-wire G3V3, G3V2
4-wire All switches except System 85
4-wire All switches except System 85
4-wire International System 75
4-wire System 85 R2V2 - R2V4
8410 Voice Terminal
3-265