New SBC install - cannot transfer Shared Park calls

[NDGsystems]

Hi all,

After installing a SBC (windows 10) for one of our clients, the receptionist extension 000 (Grandstream GXP-2140 with GXP2200 extension board) cannot transfer a second parked call to anyone.

To clarify:

1. Call 1 is answered by extension 000
2. Call 2 comes in to extension 000
3. Call 1 placed on Shared park extension 1 using BLF on extension board
4. Call 2 is answered by extension 000
5. Extension 000 tries to transfer call 2 to any other extension and fails

callers hear the hold music but are not transferred to destination extension.
Destination extension can see that 000 is calling but when picked up there is no audio. Extension 000 still says "Transferring"

We upgraded from V15 to V16 and installed the SBC at the same time.
3CX 16.0.2.910, Hosted on AWS
GXP-2140 1.0.9.135,

I would appreciate any help regarding this.

Joe

 

[NDGsystems]

Atlantic broadband router in bridged mode. All routing is done by the Netgear.

 

[JohnS_3CX]

Lets eliminate the possibility possibility of the router first if possible.

If you have the chance, unplug it from the modem or internet access, and connect the phones and SBC directly to the different router if you have one you can use for testing. The ISP modem should not be causing any problems if it is in bridge mode I would presume.

You only need 2 phones and the SBC. They must be restarted to clear their DNS caches and to receive new IP from the router.

Then just make a call from the one to the other without PBX Delivers audio and see if it works. If it seems fine, then test your shared parking next and that should work too hopefully