A.Ring

B.reticular

C.Tree

D.chain

A.Multicast refers to the point-to-multipoint communication form in the network.

B.IPTV is a way of video on demand

C.Through the introduction of controlled multicast, the management and control of multicast users are completed on the DSLAM device.

D.The core of the multicast technology is to put the message copying work as close as possible to the receiver, and reduce the data traffic on the network.

A.There is abnormal attenuation on the ODN line.

B.The ODN line is too long and exceeds the upper line distance set by the system.

C.The optical power received by the ONU is greater than the overload optical power.

D.The optical power received by the ONU is less than the sensitivity value.

A.uplink only supports GPON interfaces

B.support ADSL, VDSL, POTs access

C.supports 4 service slots

D.Support AC/DC input

A.Ringing

B.Move

C.Notify

D.Subtract