Product Specification:
| Power | AC110V or AC220V 50-60Hz | |
| Feed Currency | DC48V; 25mA | |
| Ringing Currency | AC65v/50Hz | |
| DISA | 10 second | |
| Communication path | 1 | |
| Extension number length | 2 to 4 digits | |
| Caller ID | * Receive: Auto adapt DTMF, FSK (Bell.202) | |
| * Send: FSK (Bell.202) | ||
| Dial mode | DTMF | |
| Degree of Unbalance | * 300Hz~600Hz≤40dB | |
| about earth | * 600Hz~3400Hz≤46dB | |
| Transmission Attributes | * Extension to extension ≤1.5dB | |
| * Extension to extension ≤2.0dB |




