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7940/7960 and 7931 in CCM


we are trying to deploy CCM version. But we are experiencing several problems about CCM Redundancy with IPPhone models mentioned at title. The problems are that if we restart/shutdown publisher server, IPPhones cannot connect to subscriber server. The same test works fine with 7912 IPPhone Model.

Both publisher and subscriber are TFTP servers and IPPhones are DCHP configured.

Any ideas?


Hall of Fame Super Red

Re: 7940/7960 and 7931 in CCM

Hi Antonio,

This registration is determined using the relationship between Device Pools and Callmanager Groups. By design, you can specify where a phone registers by assigning it to a specific Device Pool this in turn will look at a Callmanager Group that lists a Primary, Secondary and Tertiary Callmanager server. Perhaps these phone models are in different Device Pools/CCM Groups. Here is some related info;

Cisco Unified CallManager Groups

A Cisco Unified CallManager group comprises a prioritized list of up to three Cisco Unified CallManagers. The first Cisco Unified CallManager in the list serves as the primary Cisco Unified CallManager for that group, and the other members of the group serve as secondary (backup) Cisco Unified CallManagers.

Cisco Unified CallManager groups associate with devices through device pools. Each device belongs to a device pool, and each device pool specifies the Cisco Unified CallManager group for all of its devices.

Cisco Unified CallManager Groups:

Call processing load balancing You can configure device pools and Cisco Unified CallManager groups to distribute the control of devices across multiple Cisco Unified CallManagers.

Device Pools

Device pools provide a convenient way to define a set of common characteristics that can be assigned to devices.

Hope this helps!


Re: 7940/7960 and 7931 in CCM

Hi Rob,

thanks for your response. My problem is only related with high range IPPhones (7931/7940/7960) with phones like 7905 and 7912 I haven't experimented that errors.

I' ve seen in another conversation that there are several problems with firmware from 7940/7960 series and CCM 6.

All is configured correctly, if not, 7905 and 7912 IPPhones doesn't work.

Any ideas?



New Member

Re: 7940/7960 and 7931 in CCM

I'm having the same issue, have you figured the solution to that?