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

Ringing
The 7403D voice terminal has electronic tone ringing. The volume control is on the left side of
the housing.
Mounting Options
The 7403D voice terminal comes equipped with a nonadjustable desk stand. An optional wall
mounting kit can be ordered.
Color Options
The 7403D voice terminal was available in black and misty cream.

Distance Limitations

The maximum distance the 7403D voice terminal can be located from the system cabinet is
shown in the following table.
SYSTEM
SYSTEM 85
DEFINITY G2
DEFINITY G1 & G3
SYSTEM 75
Note: These ranges can be extended to 5,000 feet (1524 m) for 24 AWG wire and 4,000
feet (1219 m) for 26 AWG wire with the use of a Data Link Protector (DLP). Refer to
EXPOSED PORT PROTECTION.

Power Requirements

The 7403D voice terminal receives power from the system and does require any external power
supply. Additional power is required when the 7403D voice terminal is equipped with a DTDM.
Refer to the ADJUNCT POWER section of this manual.
NOMINAL MAXIMUM RANGE
IN FEET (METERS) (SEE NOTE)
PORT BOARD
24 AWG
SN270B 3,400 (1,034)
TN754 3,400 (1,034)
SN270B 3,400 (1,034)
TN754 3,400 (1,034)
TN754 3,400 (1,034)
7403D Voice Terminal
26 AWG
2,200 (671)
2,200 (671)
2,200 (671)
2,200 (671)
2,200 (671)
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