试题详情
- 单项选择题A company is using a multi-site centralized call processing model. Which feature ensures that theremote site IP phones will still have limited functionality given a WAN outage？（）
A、 Call Admission Control
B、 TAPI
C、 MGCP
D、 SRST
关注下方微信公众号，在线模考后查看
热门试题