7937 hangs

[evangaever]

I have one 7937 in a remote office. It running software apps37sccp.1-4-4-0 just like my other 7937s. I have CUCM version 7.1.5. When I make a call to this phone I see that the call is active a both ends for a few seconds but no audio. Next the 7937 hangs, buttons don't work and I need to unplug/plug it to get it working again. On the other end I have a fast busy. I had the phone RMAed but now have the same issue with the new one.

[Carlo Poggiarelli]

Hi.

I would, first, check the connecivity between CUCM site and remote Office.

Are you using different region or location between sites?

Let us know

Regards

Carlo

[evangaever]

The problem also occurs if we call from a C6941 on the same site to the C7937. Calls from/to the C6941s on the site work perfectly.

[Aman Soi]

Hi,

Can u try pinging the IP address assigned to 7937 G locally to check for any drops/LAN port problem?

Are u using local DHCP for IP address configuration on IP phones?

regds,

aman

[evangaever]

Hi,

I don't see any drop. We do use DHCP.

Erik

[Carlo Poggiarelli]

Hi Erik.

Which status do you see on the CUCM when 7937 hangs? (Registered,Unregistered,Unknown)

Let us Know

Regards

Carlo

[evangaever]

Unregistered

[Aman Soi]

Hi Erik,

Was this working  earlier or any change in configs ?

I hope u have uploaded QED file in call manager.

cmterm-7937-QED-1-4-4-SCCP.cop.sgn

regds,

aman

[evangaever]

This is the first 7937 on this site. I do however have workin 7937s (same software version) on other sites registering to the same cluster.

[Aman Soi]

Hi Erik,

As u have mentioned , it hangs and shows unregistered,there is a site specific issue which could be related to config.

Any ACL applied/Firewall at site?

regds,

aman

[evangaever]

The site is connected over a VPN. No ACLs on the tunnel.

[Aman Soi]

Hi Erik,

Can u try connecting another working IP phone on switch port where 7937 is connected?

Also, try connecting 7937 on working switch port of 6921 .

regds,

aman

[evangaever]

Connecting to the cable of a working 6921 din't help.

[Aman Soi]

Hi Erik,

Can't click where could be the problem?

Let others see and help.

regds,

aman