Raisecom Technology Co., Ltd
17
Return loss: 30-40 db
Balance: 60-70 db
Common-Mode Rejection Ratio: 60-70 db
Power Supply Rejection Ratio: Vcc: 30 db Vbat: 30 db
Idle channel noise: 75 db
5.2.2. Interface standard of FXO voice relay user-board
(RC3000-SUB-DO):
Ring detect voltage:
≥
35 V
Ring detect frequency: 17-63 Hz
Ring not detect frequency:
≤
15 V
2W loop impedance:
pickup status 200+680
Ω
hangup status 2M
Ω
Gain from 2W to 4W: hangup status -0.60 db
Frequency characteristic from 2W to 4W: hangup status 0±0.2 db
Gain from 2W to 4W: pickup status 0±0.5 db
Frequency characteristic from 2W to 4W: pickup status 0±0.2 db
Gain from 4W to 2W: pickup status -3.5±0.5 db
Frequency characteristic from 4W to 2W: pickup status 0±0.2 db
Return loss: 30-40 db
Balance: 60-70 db
Common-Mode Rejection Ratio: 60-70 db
Power Supply Rejection Ratio: 30 db
Idle channel noise: 75 db
5.2.3. Interface standard of E&M 2 audio relay user-board
(RC3000-SUB-DM2):
AD gain: 0 db
DA gain: -3.5 db
AD frequency characteristic (300-3400Hz): 0±0.2 db
DA frequency characteristic (300-3400Hz): 0±0.2 db
Output loop impedance: 600
Ω
Input loop impedance: 600
Ω
Blance: 60-70 db
