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2801 Call manager ip phone image


I have a Cisco 2801 ISR with CCME and a couple of 7940's (this is my lab).
I am having trouble understandnig what to do with IP phones and the tftp images they download.
I know I have to specify a tftp server under the dhcp option 150, however I just specify the router, is this correct and the phones just pickup a file from the router automatically, or do I have to create a file? As at the moment the phones just hang saying "configuring IP" and "CM List".

Also is there anywhere on the net I can get an idiots guide to configuring CCME on the 2800s?


IP TelephonyVoice Over IP

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8/22/2022 - Mon

Option 150 is specifically for TFTP server and I am pretty certain that the 2801 cannot run that. You need a TFTP server setup on your network with the valid configuration files for the phones to pull down. You need to configure the option 150 line to point to the ip of the tftp server.

As far as an idiots guide I am not certain though Cisco website does have some configuration examples online depending on what you need to do, it may be enough.

Sounds like you need to visit amazon.

how do i create the configuration files and how do the phones know which file to download?
I have had i quick look at amazon however I am not sure on the best book.



You will really need to read up on the configuration file contents as there are quite a lot of options to include and you must become familiar with the syntax. Its a lab remember so you must learn this ;). The files are save with the MAC address of the phone so when the phone connects to the server it grabs its own file.
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