Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 3

After configuring a Cisco CallManager Express with Cisco Unity Express, inbound calls from the PSTN SIP trunk receive a ring tone for 20 seconds and then a busy signal instead of voicemail. Which configuration fixes this problem?

Answer options

• A. Router(config)# voice service voip Router(conf-voi-serv)#allow-connections h323 to h323
• B. Router(config)#dial-peer voice 2 voip Router(config-dial-peer)#no vad
• C. Router(config)# voice service voip Router(conf-voi-serv)#allow-connections voice-mail mod
• D. Router(config)# voice service voip Router(conf-voi-serv)#no supplementary-service sip moved-temporarily

Correct answer: D

Explanation

The correct answer is D because it disables the supplementary service that causes SIP calls to be treated as temporarily unavailable, allowing them to route to voicemail instead of generating a busy signal. Options A and C are related to connection types and voicemail modes but do not address the specific issue at hand. Option B is about disabling voice activity detection, which does not solve the problem of the busy signal.