(CX28332 / CX28333) Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit E3/DS3/STS-1线路接口单元 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit DATACOM, PCM TRANSCEIVER, PQFP100 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit DATACOM, PCM TRANSCEIVER, PQFP80