Cisco Unified Communications Manager Administration Guide, Release 7.1(2)
Survivable Remote Site Telephony Configuration
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Survivable Remote Site Telephony Configuration

Table Of Contents

Survivable Remote Site Telephony Configuration

SRST Reference Configuration Settings

Finding an SRST Reference

Configuring an SRST Reference

Deleting an SRST Reference

Related Topics


Survivable Remote Site Telephony Configuration


Use the following topics to add, update, copy, or delete a SRST reference:

SRST Reference Configuration Settings

Finding an SRST Reference

Configuring an SRST Reference

Deleting an SRST Reference

Related Topics

SRST Reference Configuration Settings

A survivable remote site telephony (SRST) reference comprises the gateway that can provide limited Cisco Unified Communications Manager functionality when all other Cisco Unified Communications Manager servers for a device are unreachable. Typically assigned to device pools, SRST references determine the gateways where calling devices search when they attempt to complete a call if Cisco Unified Communications Manager is unavailable. For more detailed information on SRST references, refer to the "Survivable Remote Site Telephony References" section in the Cisco Unified Communications Manager System Guide.

Table 19-1 describes the SRST reference configuration settings. For related procedures, see the "Related Topics" section.

Table 19-1 SRST Reference Configuration Settings 

Field
Description

Name

Enter a name in the SRST Reference Name field. The name can comprise up to 50 alphanumeric characters and can contain any combination of spaces, periods (.), hyphens (-), and underscore characters (_). Ensure that each SRST reference name is unique.

Note Use concise and descriptive names for your SRST references.

Port

Enter the port number for this SRST reference. Default value specifies 2000.

Note Change this value only if it does not match the gateway port setting. This value and the gateway port setting must match.

IP Address

Enter the IP address of the gateway for devices in a device pool to use as an SRST reference.

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.


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.


Note During your work in a browser session, Cisco Unified Communications Manager Administration retains your SRST reference search preferences. If you navigate to other menu items and return to this menu item, Cisco Unified Communications Manager Administration retains your SRST reference search preferences until you modify your search or close the browser.


Procedure


Step 1 Choose System > SRST.

The Find and List SRST References window displays. Records from an active (prior) query may also display in the window.

Step 2 To find all records in the database, ensure the dialog box is empty; go to Step 3.

To filter or search records

From the first drop-down list box, select a search parameter.

From the second drop-down list box, select a search pattern.

Specify the appropriate search text, if applicable.


Note To add additional search criteria click the + button. When you add criteria, the system searches for a record that matches all criteria that you specify. To remove criteria, click the - button to remove the last added criterion or click the Clear Filter button to remove all added search criteria.


Step 3 Click Find.

All matching records display. You can change the number of items that display on each page by choosing a different value from the Rows per Page drop-down list box.


Note You can delete multiple records from the database by checking the check boxes next to the appropriate record and clicking Delete Selected. You can delete all configurable records for this selection by clicking Select All and then clicking Delete Selected.


Step 4 From the list of records that display, click the link for the record that you want to view.


Note To reverse the sort order, click the up or down arrow, if available, in the list header.


The window displays the item that you choose.


Additional Information

See the "Related Topics" section.

Configuring an SRST Reference

The following procedure describes how to add, update or copy an SRST reference.

Procedure


Step 1 Choose System > SRST.

Step 2 Perform one of the following tasks:

To add a new SRST reference, click the Add New button and continue with Step 3.

To update an existing SRST reference, locate the appropriate SRST reference as described in the "Finding an SRST Reference" section and continue with Step 3.

To copy an existing SRST reference, locate the appropriate SRST reference as described in the "Finding an SRST Reference" section, click the Copy button next to the SRST reference that you want to copy, and continue with Step 3.

Step 3 Enter or update the appropriate settings as described in Table 19-1.

Step 4 Click Save.


Note If devices are associated with this SRST reference, a message displays to tell you that devices need to be reset for the update to take effect. Cisco Unified Communications Manager may drop calls in progress on an affected gateway may be dropped when the gateway is reset.

To reset the affected devices, click the Reset Devices button when the update is complete. If you do not want to reset the devices at this time, you can return to this item at any time and click the Reset Devices button to initiate the required device resets.



Additional Information

See the "Related Topics" section.

Deleting an SRST Reference

The following procedure describes how to delete an SRST reference.

Before You Begin

You cannot delete SRST references that device pools or other items are using. To find out which device pools are using the SRST reference, click the Dependency Records link from the SRST Reference Configuration window. If the dependency records are not enabled for the system, the dependency records summary window displays a message. For more information about dependency records, see the "Accessing Dependency Records" section on page A-2. If you try to delete an SRST reference that is in use, Cisco Unified Communications Manager displays an error message. Before deleting an SRST reference that is currently in use, you must perform either or both of the following tasks:

Assign a different SRST reference to any device pools that are using the SRST reference that you want to delete. Refer to the "Configuring a Device Pool" section on page 9-11.

Delete the device pools that are using the SRST reference that you want to delete. See the "Deleting a Device Pool" section on page 9-13.

Procedure


Step 1 In the menu bar, choose System > SRST.

Step 2 Locate the SRST reference that you want to delete. See the "Finding an SRST Reference" section.

Step 3 Check the check box of the SRST reference that you want to delete and click Delete Selected.

A message displays, that tells you that you cannot undo this action.

Step 4 To delete the SRST reference, click OK or to cancel the deletion, click Cancel.


Caution Before initiating this action, check carefully to ensure that you are deleting the correct SRST reference. You cannot retrieve deleted SRST references. If an SRST reference is accidentally deleted, you must rebuild it.


Tip You can also delete an SRST reference by locating and displaying the SRST reference that you want to delete and clicking Delete.



Additional Information

See the "Related Topics" section.

Related Topics

SRST Reference Configuration Settings

Finding an SRST Reference

Configuring an SRST Reference

Deleting an SRST Reference

Survivable Remote Site Telephony References, Cisco Unified Communications Manager System Guide