Which Internet Protocol(IP) telephony element is best categorizedas a voice application component?()
- A、IP telephone
- B、Voice gateway
- C、Private branch exchange (PBX)
- D、Advanced audio conferencing software
正确答案:D
答案解析:有
微信扫一扫手机做题
Which Internet Protocol(IP) telephony element is best categorizedas a voice application component?()
微信扫一扫手机做题