Incorrect time on IP phones

[Orkhan Gasimov]

Recently, all Cisco IP phones started displaying incorrect time: they are 1 hour ahead of the time displayed on the CME router.

E.g. when debugging a 7942 phone using "debug ephone detail mac-address", the output shows:

Mar 28 12:46:13.850: ephone-20[19/7]:TimeDateReqMessage
Mar 28 12:46:13.850: year=2018 month=3 day=28
Mar 28 12:46:13.850: hour=16 minute=46 second=13
Mar 28 12:46:13.850: day=3 dayofyear=87 tzoffset=14400

However, the phone displays 17:46.

Some relevant router configs:

clock timezone Baku 4 0

telephony-service
  olsontimezone Asia/Baku version 2014c
  time-zone 34
  time-format 24
  date-format dd-mm-yy

voice register global
  mode cme
  olsontimezone Asia/Baku version 2014c
  time-format 24
  date-format D/M/Y

The output of "show clock" also displays correct time.

Please help.

Thank you.

[R0g22 · Accepted solution]

I checked and the timezone 34 takes into account daylight as well. Baku timezone does not experience daylight. Configured "time-zone 35" and remove olson. Do a create cnf-files and reset the phone.

[Orkhan Gasimov · Accepted solution]

Thanks for the input, really helpful.

I did the following under "telephony-service":

 - changed the timezone from 34 to 35;

 - removed olson;

 - did a "create cnf-files".

Then I rebooted a 7942 phone, and it displayed correct time. No need for reset.

I also did the following under "voice register global":

 - changed the time-zone from 34 to 35;

 - removed olson;

 - did a "create profile".

Then I rebooted a 3905 phone, and it displayed icorrect time (UTC).

So I added back the olson command like this:

olsontimezone Asia/Dubai version 2014c

did another "create profile", and rebooted the phone again. This time it worked.

[R0g22]

Glad it helped!