Cisco Cisco Expressway
Appendix 4: Additional Information
IP Address Dialing
Unified CM cannot dial out to IP addresses, but the Expressway can. To support IP address dialing from endpoints
registered to Unified CM, we recommend following the procedure in the knowledge base article
registered to Unified CM, we recommend following the procedure in the knowledge base article
Characters Allowed in SIP URIs
The following character set is allowed in SIP URIs (further details may be found in RFC 3261):
a-z / A-Z / 0-9 / "-" / "_" / "." / "!" / "~" / "*" / "'"/ "(" / ")" "&" / "=" / "+" / "$" / "," / ";" / "?" / "/"
If other characters are needed they must be “escaped” using "%" followed by a pair of hexadecimal digits that represents
the ASCII value for the required character.
the ASCII value for the required character.
For example, "alice smith@example.com" must be encoded as alice%20smith@example.com (where %20 represents
the space character).
the space character).
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Cisco Expressway SIP Trunk to Unified CM Deployment Guide