A.Version upgrade file B in Bin format.

B.Upgrade policy file

C.Address book

D.Log file

A.Under normal circumstances, the IP phone of the local node is registered at the central node

B.The central node and the local node are interconnected through SIP relay

C.The heartbeat mechanism between the central node and the local node monitors the operating status of the peer device

D.The POTS phone of the local node is registered on the local node

A.The public network terminal receives the media stream from the private network terminal

B.Private network terminal calls public network terminal

C.The private network terminal receives the media stream sent by the public network terminal

D.Public network terminal calls private network terminal

A.The prefix must correspond to the office route selection code

B.Since prefix 28 includes prefix 289, the system performs the called number according to the maximum matching principle Analysis, the call with the called number 28901111 should choose prefix 28

C.The prefix is divided into intra-office prefix and outgoing prefix

D.Intra-office prefix refers to the prefix used when dialing between different extensions of the same company

A.The eMP system queries the address book information of the video conferencing system by accessing eUA

B.The eMP system accesses the BMU system to obtain UC system address book information

C.The account to log in to the eMP system needs to be created in the eMP system

D.eSpace Web Query the address book information of the video conferencing system by accessing eUA