30 ports FXO/FXS over fiber PCM Multiplexer
30*FXO/FXS over fiber PCM multiplexer
2-wire or 4-wire E&M over fiber optical multiplexer
E1 4*RS232 4*ethernet pcm equipment,voice over fiber device
30*FXO/FXS over fiber PCM multiplexer
2-wire or 4-wire E&M over fiber optical multiplexer
E1 4*RS232 4*ethernet pcm equipment,voice over fiber device