Patent ID: 11923905
Assignee: COMBA NETWORK SYSTEMS COMPANY LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. The distributed antenna system according to claim 7, wherein: the communication link module includes a second coupler, a radio frequency interaction circuit, a second monitoring circuit, a power conversion circuit and an uplink and downlink switching circuit;
the second coupler is connected to the first coupler or a communication link module of an upper-stage remote unit by means of radio frequency cable, the second coupler is connected to the radio frequency interaction circuit, the second monitoring circuit, the power conversion circuit and the uplink and downlink switching circuit, and the radio frequency interaction circuit is connected to the power conversion circuit and the uplink and downlink switching circuit; and
the second coupler is configured to perform at least one of operations including: acquiring a power signal, acquiring an uplink and downlink switching signal, performing monitoring signal interaction with the digital-analog expansion unit, performing analog radio frequency signal interaction with the digital-analog expansion unit, and performing analog radio frequency signal interaction with the lower-stage remote unit.