Procedure
Step 1
Select Device > Device Settings > SIP Profile
Step 2
Choose the search criteria to use and click Find.
Step 3
Select the profile to modify.
Step 4
Set the Start Media Port and Stop Media Port to contain the start and end of the port range.
The following list identifies the UDP ports that are used for other phone services and thus not available for
RTP and sRTP use:
port 4051
used for the Peer Firmware Sharing (PFS) feature
port 5060
used for SIP over UDP transport
port range 49152 to 53247
used for local ephemeral ports
port range 53248 to 65535
used for the VxC single tunnel VPN feature
Step 5
Click Save.
Step 6
Click Apply Config.
Related Topics
Cisco Unified Communications Manager Documentation, on page xvii
Mobile and Remote Access Through Expressway
Mobile and Remote Access Through Expressway lets remote workers easily and securely connect into the
corporate network without using a virtual private network (VPN) client tunnel. Expressway uses Transport
Layer Security (TLS) to secure network traffic. For a phone to authenticate an Expressway certificate and
establish a TLS session, the Expressway certificate must be signed by a public Certificate Authority that is
trusted by the phone firmware. It is not possible to install or trust other CA certificates on phones for
authenticating an Expressway certificate.
The list of CA certificates embedded in the phone firmware is available at http://www.cisco.com/c/en/us/
support/collaboration-endpoints/unified-ip-phone-8800-series/products-technical-reference-list.html.
Mobile and Remote Access Through Expressway works with Cisco Expressway so you should be familiar
with the Cisco Expressway documentation, including the Cisco Expressway Administrator Guide and the
Cisco Expressway Basic Configuration Deployment Guide.
Only the IPv4 protocol is supported for Mobile and Remote Access Through Expressway users.
For additional information about working with Mobile and Remote Access Through Expressway see:
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
166
Phone Feature Configuration
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