Internet Telephony Gateway User's Manual

VIP User’s Manual
Technical Specifications
72
A.6 FXO Card Technical Specifications
Signaling: Loop Start / DTMF
No. of channels: 4
Interface Connectors: 4 RJ-11 2-pin modular jacks.
Line Impedance :
600
W
900
W
Insertion Loss: 2 dB nominal.
Frequency Response: 300Hz ~ 3400Hz +/- 2dB w.r.t. 1004Hz.
Return Loss:
³
18 dB
Input Level adjustment: -6 dB to +6 dB
Output Attenuation: 0 dB to 13 dB
Longitudinal Balance:
³
45 dB
A.7 FXS Card Technical Specifications
Signaling: Loop Start / DTMF
No. of channels: 4
Interface Connectors: 4 RJ-11 2-pin modular jacks.
Line Impedance :
600
W
900
W
Insertion Loss: 2 dB nominal.
Frequency Response: 300Hz ~ 3400Hz +/- 2dB w.r.t. 1004Hz.
Return Loss:
³
18 dB
Input Level adjustment: -6 dB to +6 dB
Output Attenuation: 0 dB to 13 dB
Longitudinal Balance:
³
45 dB
Loop Current: 25mA nominal
Ring Voltage: 50Vrms Nominal
Ringing Tone: 16.67Hz, 20Hz(default), 25Hz or 50Hz