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Exam 300-820 topic 1 question 66 discussion

Actual exam question from Cisco's 300-820
Question #: 66
Topic #: 1
[All 300-820 Questions]


Refer to the exhibit. An engineer is deploying mobile and remote access in an environment that already had functioning Business to Business calling. Mobile and remote access SIP registrations are failing. To troubleshoot, SIP logs were collected. How is this issue resolved?

  • A. Change the SIP profile on the SIP trunk for the Expressway-E to Standard SIP Profile for TelePresence Endpoint
  • B. Change the ג€Incoming Portג€ in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations
  • C. Enable autoregistration for the appropriate DN range on the Cisco UCM servers running the CallManager service
  • D. Write a custom normalization script since the ג€vcs-interopג€ normalization script does not allow registrations
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Suggested Answer: B 🗳️
by Omitted at June 15, 2022, 2:25 a.m.

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Collabinski
10 months, 1 week ago
Selected Answer: B
A diagnostic log from Expressway-C shows a SIP/2.0 405 Method Not Allowed message in response to the Registration request sent by the Jabber client. This is likely due to an existing Session Initiation Protocol (SIP) trunk between Expressway-C and CUCM using port 5060/5061. In order to correct this issue, change the SIP port on the SIP Trunk Security Profile that is applied to the existing SIP trunk configured in CUCM and the Expressway-C neighbor zone for CUCM to a different port such as 5065. https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/118798-technote-cucm-00.html#anc16
upvoted 1 times
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Ol_Mykhailiuk
1 year ago
Selected Answer: B
In order to correct this issue, change the SIP port on the SIP Trunk Security Profile that is applied to the existing SIP trunk configured in CUCM and the Expressway-C neighbor zone for CUCM to a different port such as 5065.
upvoted 1 times
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Omitted
1 year, 5 months ago
Selected Answer: B
B is correct, this is a common issue. https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/118798-technote-cucm-00.html#anc16
upvoted 3 times
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