SPA504G/SPA508G with SPA500S and Intercomm

[Telemates]

I have a large office setup with CISCO SPA504G and SPA508G handsets. The main reception has two SPA500S expansion modules attached.

These are all connected with an Elastix server. 

My challenge is using the intercom facility and the SPA500S. I can call a phone extension in the office by dialling *80 <extension number> and the receiving phone will automatically operate in Intercomm mode.

I need to set up the SPA 500S console so that certain extensions have the *80 intercomm function built into the speed dial button and still have BLF and CP functions built in.

I can program this in and it works but I lose BLF and CP of the button:

-fnc=sd;ext=*80123@$PROXY

The current programming I have built into each button which works ok is as follows:

-fnc=blf+sd+cp;sub=123@$PROXY;ext=123@$PROXY;nme=<Name>

Is there a way I can combine the two together into the one button so that I can get both the following functions in the one button:

-fnc=blf+cp;sub=123@$PROXY;ext=123@$PROXY;nme=<Name>

-fnc=sd;ext=*80123@$PROXY

[Dan Lukes]

Well. Interactions between sub= and ext= ant it's relationship to blf,cp and sd are not so clear nor well documented. I tried to configure something like you in the past and my conclusion is - it is not possible.

We created workaround on our PBX to satisfy our wishes ...

[Telemates]

May I ask what work around you created?

[Dan Lukes]

All calls from reception to two particular destinations in question are "intercom call" in our environment. So I forced the PBX to add *80 prefix (well, we are using other prefix in the fact) to all calls from this equipment to those two destinations.

We are using raw Asterisk, so I have PBX logic under full control. I don't know it is possible on Elastix clone or not.