Do phones automatically failover when a Subscriber is down?

We are running CUCM 8.6 with one publisher and two subscribers. One of the subscribers has failed and we are now running off only one subscriber. In this mode, we are experiencing a number of minor problems with the phones including:
Time on handsets using incorrect format. (shows as 24hour when it should be 12 hour)
Phones keep ringing after the extension has beenanswered.
One-Way voice.
Calls dropping out when put on hold
Unable to pickup call when it's put on hold.
Are the phones meant to automatically failover to the other subscriber when one fails? Or do we need to manually reboot the handsets for this to take place?
Also, is all functionality meant to be available when running in the degraded mode?

Hi Robert,
The phones should automatically failover to the backup subscriber if the backup subscriber is added in the Callmanager group which is assigned to the device pool of the IP phone. For issues like one way audio and dropped calls you also need to check that the media resources like Transcoder , CFB , MTP etc have backup servers defined, else you will experience issues where these resources are requested but they are unregistered as the only subscriber which is defined for them is down.
HTH
Manish

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Hi,
I would verify if Database Availability Group means AlwaysOn Availability Group.
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http://msdn.microsoft.com/en-us/library/hh710061.aspx#FClevel
There are two useful articles may be helpful:
SQL 2012 AlwaysOn Availability groups Automatic Failover doesn’t occur or does it – A look at the logs
http://blogs.msdn.com/b/sql_pfe_blog/archive/2013/04/08/sql-2012-alwayson-availability-groups-automatic-failover-doesn-t-occur-or-does-it-a-look-at-the-logs.aspx
SQL Server 2012 AlwaysOn – Part 7 – Details behind an AlwaysOn Availability Group
http://blogs.msdn.com/b/saponsqlserver/archive/2012/04/24/sql-server-2012-alwayson-part-7-details-behind-an-alwayson-availability-group.aspx
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TechNet Community Support
Hi,
Thanks for the reply.
It's an AlwaysOn Availability Group.
In my test lab, I have changed the quorum configuration to a file share witness and that has allowed an automatic failover when I turn the primary replica server off (rather than power it off).
I'll take a look at the links you provided.
Regards,
Bob

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Hi
setup a simple 2 node AG, sync. (SQL 2014 enterprise on windows 2012R2 standard)
if I set it as manual failover everything works as expected. however when I switch to automatic failover and stop SQL service on the primary node the AG resource in cluster does offline and doesn't failover to secondary node.
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How did you set the FailureConditionLevel?
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http://msdn.microsoft.com/en-us/library/hh710061.aspx#FClevel
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http://blogs.msdn.com/b/sql_pfe_blog/archive/2013/04/08/sql-2012-alwayson-availability-groups-automatic-failover-doesn-t-occur-or-does-it-a-look-at-the-logs.aspx
SQL Server 2012 AlwaysOn – Part 7 – Details behind an AlwaysOn Availability Group
http://blogs.msdn.com/b/saponsqlserver/archive/2012/04/24/sql-server-2012-alwayson-part-7-details-behind-an-alwayson-availability-group.aspx
Thanks.
Tracy Cai
TechNet Community Support
Hi,
Thanks for the reply.
It's an AlwaysOn Availability Group.
In my test lab, I have changed the quorum configuration to a file share witness and that has allowed an automatic failover when I turn the primary replica server off (rather than power it off).
I'll take a look at the links you provided.
Regards,
Bob

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Automatic failover doesn't failback to the first server if the second server is lost.

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Thank you Tom
But I have already checked that and reported the Errorlog abstracts in my original post.
When DB01 disapears for the first time, nothing in the DB01 ERRORLOG (it is restarting :-) )
AND no particular error message in the DB02 ERRORLOG (nothing related to the fact that DB01 is not reachable anymore !!! )
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Do phones automatically failover when a Subscriber is down?

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