8 Channels PCM Voice Telephone Tel over Fiber Optic Converters 100M Ethernet SC
Ringing frequency: 17~60HZ. Ringing frequency: 22~28HZ. Single-mode and multi-mode adaptive, simplex SC interface. Ethernet RJ45 port specifications Bell flow: AC90 plus or minus 15V. Balanced noise: ≤63.7dBmop.