AT&T System 85 manual 184

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
SYSTEM	PORT BOARD	IN FEET (METERS) (SEE NOTE)
		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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