UCM 8.x 7940/7960 image Compatibility

Unanswered Question
Apr 14th, 2010

I found this link on the Cisco Web page:


Unfortunately the link for UCM 8.x image doesn't have any data.  It does for the rest of the images listed.  I was able to find the following listed for the 7940 phone images under the 7.1 image link:

Initial8.1(1)/SCCP; 8.12(0)/SIP8.1(1)/SCCP; 8.11(0)/SIP
Earliest8.0(2)/SCCP; 8.8(0)/SIP8.0(2)/SCCP; 8.8(0)/SIP

What is meant by 'earliest' and 'initial'?  My 7940 and 7960 phones currently have image 8.0(9) on them.  We're getting ready to do a direct UCM  upgrade from version 6.1.3-3000-1 to 8.0.2.  Will UCM (after upgrade) see that my phones have an image that is a later version than the one listed as the earliest and not automatically upgrade the phone?    Or will it want to upgrade the phones with whatever images that come with the 8.0 version of UCM?  Does anyone know of another reference that has which phone image versions are compatible with UCM 8.x?

The latest release on the download software page for the 7940 using SCCP is 8.1(2).  The release notes for it published August 25, 2009 doesn't mention anything about UCM 8.x:

This firmware release is compatible with Cisco Unified Communications Manager releases 7.1, 7.0, 6.1 and 6.0, Cisco Unified CallManager releases 5.1, 5.0, 4.3, 4.2, 4.1, 4.0, and Cisco CallManager release 3.3.

I can't imaginge that they're not supported in UCM 8.x.   The main reason we're going to UCM 8.x is that UCCX cluster is supported. 802.1x is also is another reason.  The 7940/7960 will only support MAC authentication under 801.x so if we don't have to upgrade them would be good.  I have many 7940 and 7960 phones spread out over the WAN connecting back to the cluster. They don't support either PPID or the load server options.  I'm worried that they are all going to try and upgrade all at once congesting the WAN and overload the TFTP servers etc.  I'll have to scramble to get something set up locally to them if upgrading is inevitable.   

I have this problem too.
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mmendonca Wed, 04/14/2010 - 12:30

Bill Bell supplied this link:


SCCP 8.1(2) is the device default load for the 7940/7960 in CUCM 8.x.   If I loaded SCCP 8.0(9) on the server and changed the default device load setting for the 7940/7960 to point to the firmware I think I could get around the upgrades.  Still leaves me with the compatibility question though is SCCP 8.0(9) supported in CUCM 8.x?


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