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S p e c i f i c a t i o n s
1 3 9
Extension Interface
C.O. Interface
Loop range
0 to 600 ohms
On hook voltage
35 volts
Off hook loop voltage source
35 volts
Off hook loop current
27 to 40 mA
Ringing voltage
90 volts RMS
Ringing frequency
20 Hz - True Sine wave
Total supported ringing load
5 REN
Trunk type
Loop start
Connector type
RJ-11, 2 pin
Interface impedance
600 ohms
Dial tone level
-2.4 dBm
Signaling type
DTMF only
Flash hook supported
Yes
Interface impedance
configurable -
900 ohms + 2uF
900 ohms
600 ohms + 2uF
600 ohms
Trunk type
Loop start
Connector type
RJ-11, 4-pin
Ringing impedance
3,900 ohms
Ringing sensitivity
45 volts RMS @ 20Hz
REN
0.7
Appendix G
Specifications