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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
The 7400 Series Voice Terminals
11-76The 7407D, Enhanced 7407D, and 7407 Plus Voice Terminals
11
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.
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. Refer to the Exposed Port
Protection section earlier in this manual.
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 earlier in this manual.
Table 11-13. Distance Limitations for the 7407D, Enhanced 7407D, and
7407 Plus Voice Terminals
System Port Board
Nominal Maximum Range in Feet
(Meters) (See Note)
24 AWG 26 AWG
System 85 SN270B
TN754
3,400 (1,034)
3,400 (1,034)
2,200 (671)
2,200 (671)
DEFINITY G2 SN270B
TN754
3,400 (1,034)
3,400 (1,034)
2,200 (671)
2,200 (671)
DEFINITY G1 and
G3, DEFINITY ECS,
and System 75
TN754 3,400 (1,034) 2,200 (671)