VG248 - switching them over to an alternate CallManager

Unanswered Question
Dec 3rd, 2008

Hi all,

I need to test one of our VG248 units to get it to talk to our 'new' CallManager cluster (CUCM 6.1)

Within the config of the VG (IOS style commands) there is a setting for the TFTP server, which currently points to our *old* CallManager Publisher.

Do i simply need to alter the tftp pointer on the VG248 to point to the 'new' CallManager Publisher?

All the VGC devices have been manually copied over to the new CUCM - so the devices ought to register successfully.

Any thoughts appreciated with respect to the VG248's - i haven't played with these much in the past !

VG248 > Config > Telephony > "CallManager TFTP server" x.x.x.x

There is also a "CallManager Device name" field which i assume i dont need to change? This is currently 'VGC09xxxxxxx'


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Overall Rating: 4 (1 ratings)
Rob Huffman Wed, 12/03/2008 - 09:46

Hi Andy,

Yes, you should be able to push that change (for testing) using this method :)

Identifying the Cisco CallManager TFTP Server

The VG248 uses the TFTP server to identify the correct Cisco CallManager system. If you are using DHCP, the VG248 attempts to obtain the TFTP server address from the DHCP server. Or, you can select a different TFTP server by modifying this setting. If you are not using DHCP, or if your DHCP server is not configured with a TFTP server address, you should identify the TFTP server using this setting.


To assign a TFTP server, perform these steps:


Step 1 From the main menu, choose Configure.

Step 2 Choose Telephony.

Step 3 Choose CallManager TFTP server.

Step 4 Enter the IP address or host name of the TFTP server.

Hope this helps!


andy_vvc2 Thu, 12/04/2008 - 02:24

Thanks for the prompt response Rob. I'm testing late tonight/early tomorrow.

There's no risk that pointing the VG248 at the new 6.1 CUCM will cause any update to firmware or anything on the VG is there? At present the VG points to an older 3.3(3) build of CallManager.


Rob Huffman Thu, 12/04/2008 - 05:31

Hi Andy,

You are always welcome! You should be good to go as the VG248 does not pull it's image from CCM but rather uses FTP to upgrade it's image as shown in this good doc. I wouldn't be surprised if the VG was already at the latest firmware anyways, 1-3-1

Hope this helps!



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