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7407D, Enhanced 7407D, and 7407 Plus Voice Terminals
Distance Limitations
The maximum distances the 7407D, Enhanced 7407D, and 7407 Plus voice terminals can be
located from the system cabinet are shown in the table below.
NOMINAL MAXIMUM RANGE
IN FEET (METERS) (SEE NOTE)
SYSTEM PORT BOARD
24 AWG 26 AWG
System 85 SN270B 3,400 (1,034) 2,200 (671)
TN754 3,400 (1,034) 2,200 (671)
DEFINITY G2 SN270B 3,400 (1,034) 2,200 (671)
TN754 3,400 (1,034) 2,200 (671)
DEFINITY G1 & G3 TN754 3,400 (1,034) 2,200 (671)
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 the EXPOSED PORT PROTECTION section.
Power Requirements
The 7407D (7407D01B) voice terminal requires a 3-prong 115-volt AC outlet for power. (This
outlet cannot be under the control of a wall switch.) A built-in power supply converts the 115
volts to the DC power required. A 3-wire AC power cord is provided with the voice terminal. No
external power adjuncts are required.
The Enhanced 7407D (7407D02C) and 7407 Plus (7407D02D) voice terminals receive power
from the system and do not require any external power supply. Additional power is required
when these voice terminals are equipped with any adjuncts. Refer to the ADJUNCT POWER
section of this manual.
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