A session ends when the user tries to install a Session Initiation Protocol (SIP) version 4 release through a TFTP server. After 10 seconds, the TFTP server prompts to upload the file again.
The upgrade fails due to a change in the naming conventions of the images. The earlier code does not understand the new names with the dash characters.
To resolve this issue, perform these steps:
This code release uses the earlier format for the filenames, but it can understand the new format with the dashes.
For more information on configuring SIP parameters, refer to the Configuring SIP Parameters via a TFTP Server section of Getting Started With Your Cisco SIP IP Phone (Version 4.0).