Hi Everybody,

I have installed a Skype for Business in our office and I have made a trunk to an Elastix server and from Elastix Server I have made a trunk to a FXO Voip Gateway. Everything works fine but when I amake a call from PSTN to Skype for business the callerID is missing! It is interesting that when I make a call from PSTN to Elastix Extentions the Caller ID works Fine.

I want you to help me to solve the problem of caller ID missing between PSTN calls and Skype for bussiness.

Thanks in advance and looking forward to hearing soon!