I have currently deployed Cisco Jabber along with Expressway C and E for external regeneration without VPN. I have successfully registered IM and Presence service externally on the internet and I am able to chat with other Jabber users.
I am not able to register phone services for Cisco Jabber client who are registering externally over the internet without VPN.
I have checked that all the users are able to use IM and Presence along with Phone services in the internal network and over the internet using VPN. I have configured the required DNS SRV records on both the internal and external DNS Servers.
I am attaching a screen shot of the Jabber Client that is registered over the internet along with this post for your reference.
Appreciate if you can share your thoughts on the same.
Please do let me know if you need any further informaiton.
Even I am facing same issue. Over the internet I clients are getting IM service but not Voice services.
Some one suggested me to try login in internal network first and check. This is to pull Jabber-Config.xml file from CUCM.
Is it necessary that Jabber Client has to login internally first ?
In my problem issue was that our ISP was blocking SIP ports (5060, 5061). So what we did is change the SIP TLS port to 7061 which rectified the issue.
Easiest way to trouble shoot this is to telnet to 5061 port in Expressway E from internet
In my experience it is not necessary to login first time from internal