Appendix G — Specifications
Extension Interface |
|
Loop range | 0 to 600 ohms |
On hook voltage | 35 volts |
Off hook loop voltage source | 35 volts |
Off hook loop current | 23 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 | |
Interface impedance | 600 ohms |
Dial tone level | |
Signaling type | DTMF only |
Flash hook supported | Yes |
C.O. Interface |
|
Interface impedance | 900/600 ohms |
Trunk type | Loop start |
Connector type | |
Ringing impedance | 3,900 ohms |
Ringing sensitivity | 45 volts RMS @ 20Hz |
REN | 1 |
Longitudinal balance | 69 dB |
Signal level | |
Caller ID support | All lines |
Distinctive ring supported | Yes |
System |
|
C.O. interfaces | 2 |
Extension interfaces | 4 |
1 | |
USB interface | 1 |
Memory expansion | 1 hour, 2 hours, |
| 4.5 hours, 9 hours |
| TalkSwitch Memory Cards |
