SIP Trunk Allow Inbound and Outbound Calls

[infinity5]

Hi,

We had a situation yesterday with a customers 3CX system where the Allow Inbound and Allow Outbound calls on the SIP trunk under options had been deselected and therefore prevented them from making or receiving calls.

I am the only person that had been working on the system but had not been into the SIP trunk settings, I was checking a queue and some extensions.

Is there a way the customer could have disabled these with a dial code, I thought I had seen once that there is a code you can dial in an emergency to block all calls, I could be wrong?

Does anyone have any ideas how this could have happened?

Thanks

 

[eddv123]

All the available dialcodes can be viewed in the PBX under Settings >> Dialcodes.
As per the page here: https://www.3cx.com/docs/pbx-dial-codes/

You may of been thinking about "blocking caller ID" perhaps.

 

[infinity5]

Yeah I had already checked there, it may have been an older version I saw it in.

If not a dial code, what could have disabled these options?

 

[eddv123]

The only thought I had was that one of the option in the administrator section (of extensions/users) is "Administer SIP Trunks" maybe this was selected by mistake ?

The only other thing could be is if someone hacked the PBX and gain access. If the SIP trunking provider had disabled the service there end it would stop the service (obviously) but not de-select the option in 3CX.

 

[YiannisH_3CX]

Hello @infinity5

I believe you are referring to the emergency codes of the PBX which essentially puts the PBX to out of office hours but does not disable the trunks. The only way to disable the trunk is by manually changing the Allow Inbound and Allow Outbound calls options or by hitting the Disable All button from the trunk settings which does the same thing.