Technical Characteristics:

Voltage requirements :
LB 3.3 to 4.5 V dc, CB 24-60 V line,20 to 60 mA.
Frequency range: 300-3400 Hz.
Signaling Electronic Generator:
25 or 50 Hz 45 to 80 V RMS 3W.
Station-to-Station range: using wire WD-1/TT
(loop resistance is 46 ohm per 1000 feet)
at distances of over 79 km performance is reduced.

Warning LED for "Low Battery".
LED Indicator, holding ring for 20 seconds, and outgoing warning ring.
Push button Electronic Signaling Generator.
DTMF/PULSE dialing with Redial and Flash button.
Piezo Ringer, adjustable.
Handset: H-189 with PTT switch.
Weight: Approx. 1.7 Kg excluding batteries.
Size: 240 x 95 x 110 mm.
Operation temp. -30 to +60 C.
Operates with AN/TTC 25, 38, 39 and SB-3614 switches Center.
Ring back LED.
4.5 V from standard "C" size cells.

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