About SIP Dial Rule Setup
In Cisco Unified Communications Manager Administration, use the menu path to configure SIP dial rules.
You can use SIP dial rules configuration to configure dial plans for phones that are running SIP and associate them with the following phones that are running SIP:
-
Cisco Unified IP Phone 7911, 7941, 7961, 7970, 7971, 9951 and 9971. These phones use the 7940_7960_OTHER dial rules patterns. Key Press Markup Language (KPML) allows the digits to be sent to Cisco Unified Communications Manager digit by digit; SIP Dial Rules allow a pattern of digits to be collected locally on the phone prior to sending to Cisco Unified Communications Manager. If SIP dial rules are not configured, KPML gets used. To increase the performance of Cisco Unified Communications Manager (increasing the number of calls that get processed), Cisco recommends that administrators configure SIP dial rules.
-
Cisco Unified IP Phone 7940 and 7960. These phones use the 7940_7960_OTHER dial rules patterns and do not support KPML. If you do not configure a SIP dial plan for these phones, the user must press the Dial softkey or wait a specified time before digits are sent to Cisco Unified Communications Manager for processing. This extra step for the user delays the actual call from being processed.
-
Cisco Unified IP Phone 7905 and 7912. These phones use the 7905_7912 dial rules patterns and do not support KPML. If you do not configure a SIP dial plan for these phones, the user must press the Dial softkey or wait a specified time before digits are sent to Cisco Unified Communications Manager for processing. This extra step for the user delays the actual call from being processed.
If you do not configure a dial plan for a phone that is running SIP, the user must press the Dial softkey unless the phone supports KPML. If you configure SIP dial plans, those dial plans must be associated with a phone that is running SIP, so the dial plans are sent to the device.
Tip |
When you add or update a SIP dial rule in Cisco Unified Communications Manager Administration, be aware that the Cisco TFTP service rebuilds all phone configuration files, which may cause CPU to spike on the server where the Cisco TFTP service runs, especially if you have a large system with many phones. To ensure that CPU does not spike, add or update the SIP dial rule during a maintenance window or temporarily stop the Cisco TFTP service in Cisco Unified Serviceability before you make the configuration change. If you stop the Cisco TFTP service, remember to restart the service in Cisco Unified Serviceability after you add or update the SIP dial rule. |
SIP Dial Rules Configuration Tips
When you add or update a SIP dial rule in Cisco Unified Communications Manager Administration, be aware that the Cisco TFTP service rebuilds all phone configuration files, which may cause CPU to spike on the server where the Cisco TFTP service runs, especially if you have a large system with many phones. To ensure that CPU does not spike, add or update the SIP dial rule during a maintenance window or temporarily stop the Cisco TFTP service in Cisco Unified Serviceability before you make the configuration change. If you stop the Cisco TFTP service, remember to restart the service in Cisco Unified Serviceability after you add or update the SIP dial rule. See topics related to configuring a SIP dial rule for steps that supplement the standard procedure for configuring or updating a record in Cisco Unified Communications Manager Administration.