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Cisco Jabber on windows drops first call

Good afternoon,

 

I'm running Cisco Jabber for windows version 12.7.1 on my PC for use as a softphone. Now that I'm working from home more and using it instead of my desk phone, I'm noticing a drop in the first call when I hit the answer button. 

This happens when someone calls me or if I dial out as well. When dialing out, internal or external and hit the green call button or press enter, it goes to the call screen then just drops. My second call right after will go through no problem. 

 

My thought is that it has something to do with the connection back to my call manager, my softphone is showing registered in CUCM and call alerts come through.

 

Any ideas on why the connection fails out the first time? Could it be related to a timeout issue with a setting? 

 

CUCM version 10.5.2

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Re: Cisco Jabber on windows drops first call

You are saying that you are working from home now.
Are you using expressway or VPN?
Does the jabber work normally when you are in office?
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Re: Cisco Jabber on windows drops first call

We are using VPN (Checkpoint) which I know isn't Cisco supported. We also have expressway servers for our mobile apps. Office use was mostly for testing, however I would say it worked correctly there. 

 

VPN is staying connected and we did have to work to open up certain ports. It's strange I see the call come in but it doesn't connect until after the first time. I'm starting to notice around 2 minutes of no calls is when the issue will reappear. 

 

Thanks for the reply!