Lost calls with blind transfer Grandstream 2160/70

[nowak68]

Hi All,
We have a weird problem: every now and then , when do an update on our 3CX Cloud PBX the blind transfers are going mad and
unworkable . When doing a blind transfer, 99 % of the time , the call is lost.. I asked Grandtream for help and the advised me to change option 1376 from dynamic to static in the 3CX Provisioning template . This worked until I did the last update to 16.0.5.619 .
Now all the transferred calls are lost again . Tonight I`m goig to try to set it back to dynamic , because in the past that worked for some strange reason
Software versions:
3CX 16.0.5.619( Linux 4.9.0-12-amd64 x86_64)
SBC 16.1.152 (vmware ISO 3CX)
Software version Grandstream: 1.0.11.6 GXP 2160/2170
Any one ?

Regards,
Harry

 

[JohnS_3CX]

Hello Harry,

If the blind transfers fail 99% of the time you will need to look into things starting from the basics.

First, uninstall your SBC and reinstall the latest stable. Once it's up, allow the phones to reconnect and try again to see what results you have.

 

[JohnS_3CX]

 

[nowak68]

Hi John,
Uninstalled and reinstalled the stable version, I will let you know
Regards,
Harry

 

[nowak68]

Unfortunately it didn’t help , incoming calls are lost when forwarded . And honestly, I can’t understand why . Before the upgrade everything worked fine for the last couple of weeks and every forwarded call is lost ..

 

[JohnS_3CX]

Hi Harry,

Can you please reset a couple of Grandstreams, and reprovision them via the management console?

Let's make sure we start from a good point and work our way upwards

Once this is done, try to forward from Grandstream A to Grandstream B and replicate your scenario with the two aforementioned devices