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CUCM 7.1.5 Encrypted Phones

Can anybody help ?

One customer has a CUCM 7.1.5 on MCS 78xx Cisco servers.

This CUCM runs since february 2011.

Formerly this customer has a CCM 4.1 on Windows since dec 2003.

In november 2006 on the windows 4.1 CCM we implemented encryption for 7940 / 7960 phones.

For this we loaded CTL files from USB Cisco Tokens.

In february 2011 we migrated from CCM 4.1 to CUCM 7.1.5

The migration from CCM 4.1 WIndows to CUCM 7.1.5 was made with the DMA tool

from a backup of the customer's configuration obtained with the BARS tool on the CCM 4.1

Today in november 2011, the first phones encrypted 5 years ago in nov 2006, begin to fall into a TLS error and stop working with encryption.

We have to regenerate an encrytion key (10-digit number) on the CUCM 7.1.5 and then to configure this new key on each

phone to have it to work again as encrypted.

Because we have more than 350 encrypted phones, we want to avoid doing this for every phone.

Most of them were encrypted in january 2007 (and will probably fall down as unencrypted in next january 2012).

Do you have an idea if we can do a centralized procedure which will reset this 5 year period for all encrypted phones ?

Do I have to load a new CTL file ?

Thank you for any information.


Marc - CCIE 2700

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