试题详情
- 多项选择题Which two functions can be provided by an Integrated Services Router （ISR） in a VoIP network？（）
A、 ISR can perform the functions of a multipoint control unit to facilitate voice conferencing.
B、 ISR can perform the function of a call agent in the event of loss of communication with a CallManager.
C、 ISR can provide XML applications to the phones.
D、 ISR can provide all of the functionality of a CallManager in the event of loss ofcommunication to the CallManager.
E、 ISR can act as a voice gateway to the PSTN.
- B,E
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