Upgrading 7975G Firmware?

[Luis Giraldo]

I must've been trying for 5 or 6 hours now, to find specific info on how to update my 7975G to latest firmware for hookswitch headset compatibility. The release notes for 7975G firmware 8.4(3) (attached) mentions a .exe file that fails for me everytime I try to install. I also can't locate the referenced readme.html install guide.

I recently upgraded to UC520 4.2.9 Software Pack, and all went well.  I also have CCA 1.9.

Any ideas?

Regards,

Luis

[Marcos Hernandez · Accepted solution]

Hi Luis,

The executable you have is meant to work with Cisco Unified Call Manager Server, not the Communitations Manager Express (CME on UC500). To change a specific phone load on your CME/UC500 device, you need to move the load files to the system's flash (using FTP/TFTP) and then change some lines in the configuration using CLI.

The load files are included in a zip package that can be obtained here (you probably have it already):

http://tools.cisco.com/support/downloads/go/Redirect.x?mdfid=278875240

(Navigate to "IP Telephony>>IP Phones")

Then, you will have to make some CLI modifications:

!

tftp-server flash:term75.default.loads
tftp-server flash:cnu75.8-4-2-38.sbn
tftp-server flash:cvm75sccp.8-4-2-38.sbn
tftp-server flash:dsp75.8-4-2-38.sbn
tftp-server flash:jar75sccp.8-4-2-38.sbn
tftp-server flash:SCCP75.8-4-3S.loads
tftp-server flash:apps75.8-4-2-38.sbn

!

telephony-service

load 7975 SCCP75.8-4-3S

!

Please note that although you can do the above, we highly recommend that you use only the IOS/Phone load combination included in the software packs provided by us, as those contain the only tested permutations.

Thanks,

Marcos

[Marcos Hernandez · Accepted solution]

Luis,

You can also refer to this article, for information on how to enable the feature

Wireless Headset Hookswitch Support in CME

Let me know if this helps,

Marcos