Raisecom RC3000 PCM - Interface Standard of FXO Voice Relay User-Board (RC3000-SUB-DO); Interface Standard of E&M 2 Audio Relay User-Board (RC3000-SUB-DM2)

Raisecom Technology Co., Ltd
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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+680Ω
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: 600Ω
Input loop impedance: 600Ω
Blance: 60-70 db