Solved Missed call not showing while first line is busy

[Boby]

Hi
I use Yeastar TG1600 model for SIP trunks.Call waiting is actiaved.When there is active call,it says line is busy , please hold on line for the second call. If the second call is dropped by caller 3CX doesn't show missed call.Version is 16.0.9.License is Professional Perpetual. Allow multiple calls also enabled. I searched but didn't find any useful information. Please help.

 

[Aaron Paul]

If you go into Settings>Parameters and search for ALLOWUSEBUSYOPTFORGROUP and change it from 0 to 1 and see if that resolves your issue.

 

[Boby]

Thank you for your reply @Aaron Paul .I need to do this only for one extension. There is one GSM number which is forwarded to that extension.If i change ALLOWUSEBUSYOPTFORGROUP to 1 it will take effect to all user.Could you provide an additional help ?

 

[YiannisH_3CX]

Thank you for your reply @Aaron Paul .I need to do this only for one extension. There is one GSM number which is forwarded to that extension.If i change ALLOWUSEBUSYOPTFORGROUP to 1 it will take effect to all user.Could you provide an additional help ?

Yes that option will apply for the entire system. Also I do not think it will resolve your issue and you should not enable it as it is not supported by 3CX.
From your description the call waiting is enabled on the Yeastar which holds the second call and plays the prompt to the caller. So from what I understand 3CX never sees the call. So if the caller drops the call while waiting 3CX will never know the call existed. Check the 3CX call log in this scenario and see if you see the call. If you do not then there is nothing you can do from the 3CX side.

 

[Boby]

3CX call logs shows only first line call,but second call which is missed not showing in 3CX logs.
Let me give additional information about the issuse.When there is call on L1,second call and missed call works fine when there is a call direct to the extension.But when there is call to the GSM number which forwarded to this extension it doesn't work.User can hear only second call sound but can't see anything about second call,not only missed call.It looks like there is no second call at all.

 

[YiannisH_3CX]

So again it looks like the second call never hits the 3CX system that is why it does not show up in the call log. The call is help at the gateway level since the line is busy so the 3CX system does not know that there is a second call.

 

[Boby]

So this means there is no problem with 3CX ? If answer is yes, this means problem is about Yeastar ?

 

[YiannisH_3CX]

I cannot be sure but from your description it seems that way. If the call is not hitting the 3CX then it cannot show a missed call. In that case the issue is with Yeastar

 

[leejor]

You say the second call is a GSM number forwarded to the extension. Exactly how is that call routed? Is the GSM number forwarded to a DID number on 3CX? Is the GSM number on a gateway, attached as a trunk to 3CX?

 

[Boby]

You say the second call is a GSM number forwarded to the extension. Exactly how is that call routed? Is the GSM number forwarded to a DID number on 3CX? Is the GSM number on a gateway, attached as a trunk to 3CX?

GSM number attached as trunk on 3CX.

 

[Boby]

Yeastar confirmed their device doesn't support second call.There is nothing to do about 3CX.Thanks you all for helping me.

 

[YiannisH_3CX]

Glad we could assist and thank you for sharing the response from Yeastar