Information About Configuration Files
Configuration Files for Phones
When a phone requests service from Cisco Unified CME, the registrar confirms the username, i.e. the phone number for the phone. The phone accesses its configuration profile on the TFTP server, typically the Cisco Unified CME router, and processes the information contained in the file, registers itself, and puts the phone number on the phone console display.
Minimally, a configuration profile contains the MAC address, the type, and the phone number that is permitted by the registrar to handle the Register message for a particular Cisco Unified IP phone.
Any time you create or modify parameters for either an individual phone or a directory number, generate a new phone configuration to properly propagate the parameters.
By default, there is one shared XML configuration file located in system:/its/ for all Cisco Unified IP phones that are running SCCP. For SIP phones directly connected to Cisco Unified CME, an individual configuration profile is created for each phone and stored in system:/cme/sipphone/.
When an IP phone comes online or is rebooted, it automatically gets information about itself from the appropriate configuration file.
The Cisco universal application loader for phone firmware files allows you to add additional phone features across all protocols. To do this, a hunt algorithm searches for multiple configuration files. After a phone is reset or restarted, the phone automatically selects protocol depending on which matching configuration file is found first. To ensure that Cisco Unified IP phones download the appropriate configuration for the desired protocol, SCCP or SIP, you must properly configure the IP phones before connecting or rebooting the phones. The hunt algorithm searches for files in the following order:
CTLSEP <mac> file for a SCCP phone—For example, CTLSEP003094C25D2E.tlv
SEP <mac> file for a SCCP phone—For example, SEP003094C25D2E.cnf.xml
SIP <mac> file for a SIP phone—For example, SIP003094C25D2E.cnf or gk003069C25D2E
XML default file for SCCP phones—For example, SEPDefault.cnf.xmls
XML default file for SIP phones—For example, SIPDefault.cnf
In Cisco Unified CME 4.0 and later for SCCP and in Cisco CME 3.4 and later for SIP, you can designate one of the following locations in which to store configuration files:
System (Default)—For SCCP phones, one configuration file is created, stored, and used for all phones in the system. For SIP phones, an individual configuration profile is created for each phone.
Flash or slot 0—When flash or slot 0 memory on the router is the storage location, you can create additional configuration files to be applied per phone type or per individual phone, such as user or network locales.
TFTP—When an external TFTP server is the storage location, you can create additional configuration files to be applied per phone type or per individual phone, which are required for multiple user and network locales.
Per-Phone Configuration Files
If configurations files for SCCP phones are to be stored somewhere other than in the default location, the following individual configuration files can be created for SCCP phones:
Per phone type—Creates separate configuration files for each phone type and all phones of the same type use the same configuration file. This method is not supported if the configuration files are to be stored in the system location.
Per phone—Creates a separate configuration file for each phone, by MAC address. This method is not supported if the configuration files are to be stored in the system location.
For configuration information, see Define Per-Phone Configuration Files and Alternate Location for SCCP Phones.