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Exam 300-820 topic 1 question 182 discussion

Actual exam question from Cisco's 300-820
Question #: 182
Topic #: 1
[All 300-820 Questions]



Refer to the exhibit. A company has a Cisco collaboration infrastructure that contains Cisco UCM and Cisco Expressway-C and Expressway-E for Mobile and Remote Access. When the engineer sets up the environment to support B2B calling, they discover that the zone stale between Expressway-C and Cisco UCM failed. What must the STEP Trunk Security Profile setting be changed to in Cisco UCM to resolve the issue?

  • A. UDP for the outgoing transport type
  • B. value other than the default listening port for outgoing SIP connections on Cisco UCM
  • C. value other than the default listening port for incoming SIP connections on Cisco UCM
  • D. TCP for the incoming transport type
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Suggested Answer: D 🗳️
by jonycakes at Dec. 23, 2024, 8:35 p.m.

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jonycakes
3 weeks, 5 days ago
Selected Answer: B
Answer B?: The issue between Expressway-C and CUCM is likely related to the SIP trunk configuration and its associated Security Profile settings. Specifically, this problem often arises when there is a port mismatch between the Expressway and Cisco UCM. When configuring a SIP trunk for B2B (Business-to-Business) calling, the STEP (SIP Trunk Security Profile) must be properly set up to ensure the correct port and transport settings are used. The SIP trunk may not be able to establish a successful connection if there is a conflict with the default listening port or if there is a need for a non-default port for outgoing SIP connections on Cisco UCM.
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