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多项选择题 Refer to the exhibit. The Greene Supply Company is integrating Cisco Unified CallManager Express into a SIP network. Which two statements are accurate?()

A、SIP support in dial peers is a Cisco IOS function. 

B、Use the notify-based DTMF relay mechanism that is proprietary to Cisco.

C、SIP support in Cisco IOS is a function of localized call processing integrated with Cisco Unity Express. 

D、Use either the notify-based DTMF relay mechanism that is proprietary to Cisco or the RFC-based DTMF relay. 

E、The SIP server must be configured for the E.164 numbers that are going to register with the Cisco CallManager Express database.  

  • A,D
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