Jabber unable to communicate in Phone Mode

[Ahmad El-Saka]

I've a bit weird problem. I'm setting up a lab to test Jabber. Jabber for Windows logins when pointed to Presence server and registers as a softphone as well and works normally.

But when try to be pointed it to the CUCM to register in Phone mode only it shows the error message "Cannot communicate with the server".

Any Ideas?

Thanks.

[Jaime Valencia]

Versions??

Do you have the proper SRVs configured in your network?

[Ahmad El-Saka]

CUCM 10.5.1.10000-7

CUP10.5.1.10000-8

Jabber 11.6

No i'm not using SRVs. I manually point the client to the CUCM. (Screenshot attached)

[Jaime Valencia]

Do you have proper DNS resolution?