Specifications

2-9
Cisco IOS Telephony Service, Version 2.02
Chapter 2 Required Configuration Tasks
How to Configure Cisco IOS Telephony Service
Required Configuration
When Cisco IOS Telephony Service is configured, the Cisco IP phones receive initial configuration
information and phone firmware from the TFTP server. In most cases, the Cisco IP phones obtain the IP
address of their TFTP server with the DHCP option 150 command. For Cisco IOS Telephony Service
operation, the TFTP server address obtained by the Cisco IP phones should point at the Cisco IOS
Telephony Service router IP address. The Cisco IP phones attempt to transfer a configuration file called
SEPDEFAULT.cnf. This file is automatically generated by the Cisco IOS Telephony Service router
through the ip source-address command and placed in the router's Flash memory. The
SEPDEFAULT.cnf file contains the IP address that the phones use to register for service, using the
Skinny Client Control Protocol (SCCP). This IP address should correspond to a valid Cisco IOS
Telephony Service router IP address (and may be the same as the router TFTP server address). Access
to the SEPDEFAULT.cnf file must be granted through the tftp-server command on the router.
Similarly, when an analog telephone adapter (ATA) such as ATA-186 is attached to the Cisco IOS
Telephony Service router, the ATA receives very basic configuration information and firmware from the
TFTP server XMLDefault.cnf.xml file. Access to the XMLDefault.cnf.xml file must be granted by using
the tftp-server command on the router. The XMLDefault.cnf.xml file is automatically generated by the
Cisco IOS Telephony Service router with the ip source-address command and is placed in the router's
Flash memory.
See the following sections for configuration tasks for Cisco IOS Telephony Service. Each task in the list
is required except the tasks that are marked as optional.
• Obtaining the IP Address of the Cisco IOS Telephony Service Router, page 2-9 (required)
• Enabling Files on the TFTP Server, page 2-10 (required)
• Associating Cisco IP Phones with the Cisco IOS Telephony Service Router, page 2-11 (required)
• Creating Directory Numbers for Cisco IP Phones, page 2-12(required)
• Configuring Each Cisco IP Phone, page 2-13 (required)
• Configuring Global Reset on Cisco IP Phones, page 2-14 (optional)
• Configuring Reset for Specific Cisco IP Phones, page 2-15 (optional)
Obtaining the IP Address of the Cisco IOS Telephony Service Router
The process for obtaining the IP address of the Cisco IOS Telephony Service router involves the use of
the ip source-address command in the telephony-service configuration mode:
SUMMARY STEPS
1. telephony-service
2. ip source-address ip-address [port port] [any-match | strict-match]