Chapter 3 Managing Cisco SIP IP Phones
Modifying the Phone’s SIP Settings
•sip_retx—(Optional) Maximum number of times a SIP message other than an INVITE request will be retransmitted. The valid value is any positive integer. The default is 10.
•sip_invite_retx—(Optional) Maximum number of times an INVITE request will be retransmitted. The valid value is any positive integer. The default is 6.
•proxy_register—(Optional) Whether the phone must register with a proxy server during initialization. Valid values are 0 and 1. Specify 0 to disable registration during initialization. Specify 1 to enable registration during initialization. The default is 0.
After a phone has initialized and registered with a proxy server, changing the value of this parameter to 0 will unregister the phone from the proxy server. To reinitiate a registration, change the value of this parameter back to 1.
Note If you enable registration, and authentication is required, you must specify values for the linex_authname and linex_password parameters (where
xis a number 1 through 6) in the phone-specific configuration file. For information on configuring the phone-specific configuration file, see the “Modifying the Phone-Specific SIP Configuration File” section on page 3-15.
•timer_register_expires—(Optional) The amount of time, in seconds, after which a REGISTRATION request will expire. This value is inserted into the Expire header field. The valid value is any positive number, however, we recommend 3600 seconds. The default is 3600.
•messages_uri—(Optional) Number to call to check voicemail. This number will be called when the Messages key is pressed.
•Date, Time, and Daylight Savings Time parameters. See the “Setting the Date, Time, and Daylight Savings Time” section on page 3-22 section for more information on setting the following parameters:
–sntp_mode—(Optional) Mode in which the phone will listen for the SNTP server.
–sntp_server—(Optional) IP address of the SNTP server from which the phone will obtain time data.
–time_zone—(Optional) Time zone in which the phone is located.
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