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New Member

Downgrading V11 7965


I have a bunch of Cisco 7965 handsets running Version 9-2-3. For various reasons i'd like these handsets to downgrade to version 8.

The build version of the handset i'm working on is V11 (also have cisco 7942 on V14 with the same issue)

Does anyone know how to downgrade firmware on handsets that are not the new hardware version stated in the link below.

Thanks in advance for any pointers.

Cisco Employee

Downgrading V11 7965

Hi Ben,

Have you tried uploading firmware version 8-5-2S on TFTP server and specifying the same load name under 'Phone Load name' on the Phone configuration page of 7965. Restart the TFTP service and reset the phone and see if it works or throws up any errors.



VIP Purple

Downgrading V11 7965

Hi Ben,

Go as per Manish suggestion , since as per the link mentioned by you

7965 G Phones manufactured with  hardware versions 13.0 /higher must run Firmware Release 9.3(1)SR1 or later. The phone firmware does not allow the phone to be downgraded to releases earlier than Release 9.3(1)SR1.

In your case,it is V11 for 7965G

for 7942 , it is 15.0 and, u can also degrade the same because you have got V14



New Member

Downgrading V11 7965

Thanks Gents.

I have already done what you have said just in a slightly different manner as I have a UC520. I'm confident the UC520 is ok as handsets with older firmware upgrade to 8-5-2S. (tested on 7942).

The 7942 are V14, I'm reading this from the reverse of the handset, is that correct? (PID VID CP-7942G V14 & PID VID CP-7965G V11)

I've included some snippets of my running config. They initially look as if they will downgrade and then boot with the version 9??

Any help apprecited as i am stuck!



UC_520#sh telephony-service

CONFIG (Version=8.6)


Version 8.6

Max phoneload sccp version 17

Max dspfarm sccp version 18

Cisco Unified Communications Manager Express

For on-line documentation please see:

protocol mode default

ip source-address port 2000

ip qos dscp:

ef (the MS 6 bits, 46, in ToS, 0xB8) for media

cs3 (the MS 6 bits, 24, in ToS, 0x60) for signal

af41 (the MS 6 bits, 34, in ToS, 0x88) for video

default (the MS 6 bits, 0, in ToS, 0x0) for serviceservice directed-pickup

service dnis overlay

service dnis dir-lookup

service dss

load 7942 SCCP42.8-5-2S

load 7945 SCCP45.8-5-2S

load 7962 SCCP42.8-5-2S

load 7965 SCCP45.8-5-2S

New Member

Re: Downgrading V11 7965

Find below the TFTP events from each handset. The 7965 does not reboot and attempt to upgrade where the 7942 does.


000185: Jan  5 11:34:11.231: TFTP: Looking for CTLSEPF47F353DC186.tlv

000186: Jan  5 11:34:11.307: TFTP: Looking for ITLSEPF47F353DC186.tlv

000187: Jan  5 11:34:11.391: TFTP: Looking for ITLFile.tlv

000188: Jan  5 11:34:11.667: TFTP: Looking for SEPF47F353DC186.cnf.xml.sgn

000189: Jan  5 11:34:11.819: TFTP: Looking for XMLDefault.cnf.xml.sgn

000190: Jan  5 11:34:12.647: TFTP: Looking for CTLSEPF47F353DC186.tlv

000191: Jan  5 11:34:12.759: TFTP: Looking for ITLSEPF47F353DC186.tlv

000192: Jan  5 11:34:12.871: TFTP: Looking for ITLFile.tlv

000193: Jan  5 11:34:14.591: %IPPHONE-6-REGISTER: ephone-45:SEPF47F353DC186 IP: Socket:2 DeviceType:Phone has registered.

000194: Jan  5 11:34:15.935: TFTP: Looking for SEPF47F353DC186.cnf.xml.sgn

000195: Jan  5 11:34:18.135: TFTP: Looking for XMLDefault.cnf.xml.sgn



000200: Jan  5 11:36:25.675: TFTP: Looking for CTLSEP5017FF979015.tlv

000201: Jan  5 11:36:25.779: TFTP: Looking for ITLSEP5017FF979015.tlv

000202: Jan  5 11:36:25.891: TFTP: Looking for ITLFile.tlv

000203: Jan  5 11:36:26.115: TFTP: Looking for SEP5017FF979015.cnf.xml

000204: Jan  5 11:36:26.115: TFTP: Opened flash:/its/SEP5017FF979015.cnf.xml, fd 14, size 1594 for process 162

000205: Jan  5 11:36:26.131: TFTP: Finished flash:/its/SEP5017FF979015.cnf.xml, time 00:00:00 for process 162

000206: Jan  5 11:36:39.215: %IPPHONE-6-UNREGISTER_ABNORMAL: ephone-47:SEPC8F9F9687471 IP: Socket:1 DeviceType:Phone has unregistered abnormally.

000207: Jan  5 11:36:49.483: TFTP: Looking for SCCP42.8-5-2S.loads

000208: Jan  5 11:36:49.487: TFTP: Opened flash:SCCP42.8-5-2S.loads, fd 14, size 670 for process 162

000209: Jan  5 11:36:49.495: TFTP: Finished flash:SCCP42.8-5-2S.loads, time 00:00:00 for process 162

000210: Jan  5 11:37:25.135: TFTP: Looking for CTLSEP5017FF979015.tlv

000211: Jan  5 11:37:25.247: TFTP: Looking for ITLSEP5017FF979015.tlv

000212: Jan  5 11:37:25.355: TFTP: Looking for ITLFile.tlv

000213: Jan  5 11:37:25.571: TFTP: Looking for SEP5017FF979015.cnf.xml

000214: Jan  5 11:37:25.575: TFTP: Opened flash:/its/SEP5017FF979015.cnf.xml, fd                     14, size 1594 for process 162

000215: Jan  5 11:37:25.587: TFTP: Finished flash:/its/SEP5017FF979015.cnf.xml,                     time 00:00:00 for process 162

000216: Jan  5 11:37:27.859: TFTP: Looking for English_United_States/mk-sccp.jar

000217: Jan  5 11:37:28.135: TFTP: Looking for United_States/g3-tones.xml

000218: Jan  5 11:37:29.795: %IPPHONE-6-REGISTER: ephone-46:SEP5017FF979015 IP:1           Socket:1 DeviceType:Phone has registered.

New Member

Downgrading V11 7965


Managed to downgrdae the 7965. This was done by deleting CTL files within the trust list within the security section.

However the same does not apply for the 7942/ 7962, these phones do not have CTL files installed and continue to attempt to downgrade and then fail.


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