Power Failure Operation - AT&T Callmaster Series Reference Manual

Distance Limitations
The maximum allowable distances of a 2500 YMGK telephone from the DEFINITY G1, G2, G3,
System 75, or System 85 cabinet are shown in the table below.
SYSTEM
SYSTEM 85
DEFINITY G2
DEFINITY G1 & G3
SYSTEM 75
Power Requirements
The 2500 YMGK telephone is powered by the tip and ring leads. It does not require any external
power supply.

Power Failure Operation

The 2500 YMGK telephone can be used as an emergency station during power failure transfer
conditions.
FCC Registration
The 2500 YMGK telephone FCC registration number is AS593M-17899-TE-T.
NOMINAL MAXIMUM RANGE
PORT BOARD
24 AWG
SN229 3,500 (1,067)
SN228B 15,000 (4,572)
SN229 3,500 (1,067)
SN228B 15,000 (4,572)
TN742 20,000 (6,100)
TN746 3,100 (945)
TN742 20,000 (6,100)
TN769 20,000 (6,100)
TN746 3,100 (945)
2500 YMGK Telephone
IN FEET (METERS)
26 AWG
3,500 (1,067)
9,000 (2,743)
3,500 (1,067)
9,000 (2,743)
13,000 (3,962)
2,000 (610)
13,000 (3,962)
13,000 (3,962)
2,000 (610)
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