In the FTTB/C scenario, the ONU is connected to the phone as an AG device, and there is no sound when the SIP protocol is off-hook. The possible reason is?
In the FTTB/C scenario, the ONU is connected to the phone as an AG device, and there is no sound when the SIP protocol is off-hook. The possible reason is?A . There is packet loss in the upper layer network of the olt B. The status of the MG interface...