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Cisco Unified Communications Manager Administration Guide
OL-18611-01
Chapter 19 Survivable Remote Site Telephony Configuration
Finding an SRST Reference
Finding an SRST Reference
Because you might have several SRST references in your network, Cisco Unified Communications
Manager lets you locate specific SRST references based on specific criteria. Use the following procedure
to locate SRST references that are defined by a particular user.
SIP Network/IP Address Enter the IP address of the server that the phones that are running SIP
will use when in SRST mode.
Tip You must configure the SIP Network/IP Address field and the
SIP Port field for a SIP device to fall back to the SRST-enabled
gateway
SIP Port Enter the SIP port of the SRST gateway. Default value specifies 5060.
Is SRST Secure? After you verify that the SRST-enabled gateway contains a self-signed
certificate, check this check box.
After you configure the SRST and reset the gateway and dependent
phones, the Cisco CTL Provider service authenticates to the Certificate
Provider service on the SRST-enabled gateway. The Cisco CTL client
retrieves the certificate from the SRST-enabled gateway and stores the
certificate in the Cisco Unified Communications Manager database.
Tip To remove the SRST certificate from the database and phone,
uncheck this check box, click Save, and reset the dependent
phones.
SRST Certificate Provider
Port
This port monitors requests for the Certificate Provider service on the
SRST-enabled gateway. Cisco Unified Communications Manager uses
this port to retrieve the certificate from the SRST-enabled gateway. The
Cisco SRST Certificate Provider default port equals 2445.
After you configure this port on the SRST-enabled gateway, enter the
port number in this field.
Tip You may need to configure a different port number if the port is
currently used or if you use a firewall and you cannot use the
port within the firewall.
Update Certificate
Tip This button displays only after you check the Is SRST Secure?
check box and click Save.
After you click this button, the Cisco CTL client replaces the existing
SRST-enabled gateway certificate that is stored in the Cisco Unified
Communications Manager database, if a certificate exists in the
database. After you reset the dependent phones, the TFTP server sends
the cnf.xml file (with the new SRST-enabled gateway certificate) to the
phones.
Table 19-1 SRST Reference Configuration Settings (continued)
Field Description