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500 Series Telephone
Distance Limitations
The maximum allowable distances of a 500 telephone from the DEFINITY G1, G2, G3,
System 75, or System 85 cabinet are shown in the table below.
NOMINAL MAXIMUM RANGE
IN FEET (METERS)
SYSTEM PORT BOARD
24 AWG 26 AWG
SYSTEM 85 SN229 3,500 (1,067) 3,500 (1,067)
SN228B 15,000 (4,572) 9,000 (2,743)
DEFINITY G2 SN229 3,500 (1,067) 3,500 (1,067)
SN228B 15,000 (4,572) 9,000 (2,743)
TN742 20,000 (6,100) 13,000 (3,962)
TN746 3,100 (945) 2,000 (610)
DEFINITY G1 & G3 TN742 20,000 (6,100) 13,000 (3,962)
SYSTEM 75 TN769 20,000 (6,100) 13,000 (3,962)
TN746 3,100 (945) 2,000 (610)
Power Requirements
The 500 telephone is powered by the tip and ring leads. It does not require any external power
supply.
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