ĭon’t forget to run the create profile under voice register global to generate new configuration files for the phones. The full name is, but in voice register global we omit that trailing. Notice, that the firmware name DOES NOT contain. These commands tell the router that 8851 model IP phones should use sip88xx.12-5-1SR3-74 firmware. This is done in voice register global section. Now let’s specify which phone type should use which firmware.

I had to bind it to the interface with a real IP address before it started working. Some newer routers have the TFTP server bound to the management interface by default, which was the case with my ISR4331/K9. Important! If you have a problem with your router’s TFTP server please try running the following command:

The syntax of the command is: tftp-server flash: full-name alias file-name Besides that we need to bind aliases to the full path of the files, because the clients are not aware of the directory hierarchy on CME and will be requesting file names only. Now we need to make TFTP server serve those files. Use dir command to verify the contents of the flash storage:Īs you can see all firmware files are located in /cmterm-88xx.12-5-1SR3-74/ directory.

It gets and extracts TAR archive() from TFTP server(172.16.121.57- my laptop) to the router flash. Go to the router CLI and run the following command: We can do this in one step, because our archive is in a TAR format, otherwise we would have to copy all files from the archive one by one. Now we are going to upload the TAR package to the flash of the router using TFTP protocol. Run the TFTPD32 server and make sure the base directory contains the TAR archive, so TFTPD32 can serve it. TFTPD32 is a tiny TFTP server which we are going to use to upload our firmware files to CME. You can do this using 7-Zip archiving software. Now you need to extract the contents of this ZIP archive and add all extracted files to another type of archive – TAR. zip package as shown on the picture below. Go to Cisco Software Download and download the firmware files for your IP phone model (in my case it is 8851). The first thing we need to do is download the new firmware files from Cisco website.

I will be upgrading Cisco 8851 IP phone(from version 12-0-1-11 to 12-5-1SR3-74) using Cisco ISR4331/K9 router as a CME. This article show step by step how to upgrade the firmware of a Cisco IP phone managed by CME(Call Manager Express).

Cisco tftpd32 download