Refer to the exhibit. Logins and failing via mobile and remote access. How is this resolved?

Question

Exhibit

Options

• AMobile and remote access login has not been enabled for the domain configured in the
• BSIP is disabled on the Expressway-E. The SIP protocol must be enabled on the server.
• CNo Cisco UCM servers are configured in the Expressway-C. Servers must be added for
• DAlthough a traversal client zone exists, there is no Unified Communications traversal client

• A
  9% (3)
• B
  3% (1)
• C
  6% (2)
• D
  82% (27)

Explanation

For Mobile and Remote Access (MRA) to function, Expressway-C must have a Unified Communications (UC) traversal client zone configured - not just a standard traversal client zone. A regular traversal client zone handles generic H.323/SIP traversal but lacks the UC-specific logic required for MRA (such as handling HTTP-based service discovery, provisioning, and directory lookups for Jabber). The UC traversal client zone is a specialized zone type that enables the full MRA feature set. If only a standard traversal client zone exists without the UC traversal client zone, MRA login will fail. The fix is to create and properly configure a UC traversal client zone on Expressway-C pointing to Expressway-E.

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