Setting voicemail_greeting_number (before 'answer'?)

[viiiwonder]

I recently became aware of voicemail_greeting_number (a channel variable for the purposes of specifying the greeting number to be played when transferred to a voicemail box). It would solve a situation we have where an office would like to use a single common mailbox, but have a different greeting played depending on the state of a call flow.

We already use call flows commonly to either:
Day = Transfer to ring group > RG is either answered or times out and goes to voicemail of 198
Night = Transfer straight to voicemail of 199

So, currently, day and night voicemails are handled separately.

There is no IVR in use, so the other solution on the forum for putting IVR actions in for setting the variable don't really apply.

What I've been trying to do is create two new dial plan entries:
vm199g1


and vm199g2


The flow looks as such:


The day mode works as expected - phones in the ring group right, and timeout destination of vm199g1 plays the expected greeting.

My issue is that whenever I call in when the flow is set to 'night mode', I get 404 unavailable:

WARNING [inbound routes] 404 not found [ip that is in ACL allow]

Ultimately, I believe this to be happening because the call isn't technically getting answered before it's transferred to vm199g2, and that dialplan entry requires a match on the inbound phone number. Because it makes it all the way through to my custom dialplan prior to being 'answered', I think the 'destination number' is still evaluating as the DID that was dialed.

Anyone have any suggestions or perhaps a better way to accomplish this?

 

[viiiwonder]

FYI, this boiled down to an error with my destination_number expression. I changed them from regex to just explicitly be the dial plan name/number, and all started to work as expected...