Solved Hang Up After Extension to Extension Call

[mygeeknc]

I have a client which uses a PSTN based announcement system. We've setup a Grandstream HT801 to handle this with an extra extension in 3CX which works just fine. The employees dial the internal extension, make the announcement and then hang up. When they hang up, the PA system plays a busy signal for about 20-30 seconds after the hang up occurs. Is there a way to just cut off the call and bypass the busy signal all together?

I've seen some other posts about something similar but the responses were along the lines of the VoIP provider not getting the correct BYE signal but this is all internal. This does not go through the provider.

Thanks!

 

[JohnS_3CX]

Hi,

Think of older PSTN networks: when someone hangs up on you, the network will play a busy signal and it's up to you to hang up the handset. This is perfectly normal and expected behavior.

Same thing here - the reason you hear the busy signal is because BYE was indeed received so no point looking in that direction. You need to get your PA system to recognise the busy signal, and cut off the line just like a real human would do.

Otherwise, why not consider going full VoIP and replace your old PA with something like the Fanvil PA3 so you don't have these glitches.

 

[mygeeknc]

John, thanks for your reply but the client did not want to replace the system which is understandable.

For future reference, if anyone runs across this post having the same issue. We resolved it by making a setting change on the HT801. In the admin portal, under the FXS Port tab. Search for a setting called "Loop Current Disconnect" and set it to "Yes".



This resolved the busy signal after the hang up on a PA system hooked to the GrandStream HT801.

 

[JohnS_3CX]

Thanks for sharing your solution!