Release 4.5 Firmware Upgrade Procedure - Nortel SRG50 Configuration Manual

52 Chapter 3 CS 1000 considerations

Release 4.5 firmware upgrade procedure

When an IP telephone requires a firmware upgrade, the CS 1000 uses the umsUpgradeAll
command, or variant, to redirect the telephone back to the SRG50 for upgrading. If the required
file does not exist on the SRG50, or its version is incorrect, the SRG initiates an FTP session to the
TPS for that phone to retrieve the required file. The SRG50 upgrades the phone and redirects it
back to the CS 1000.
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