Oleg,did you ever have any luck setting this up. I have a STS with one SLT hanging off of it going to a Asterisk server. I then have 8 lines off that at home offices.

Currently the home offices can call outside CO lines or internal extensions without a problem. However, Internal extentions on the STS system cannot call the voip lines.

I planned on fixing this by setting up a incoming calls conf for asterisk that will answer incoming calls. Then tell the person to dial an extension.

So for Internal STS users to call a VoIP user they will have to first dial the SLT extension then it will prompt for the voip extension they want. Kinda cludgy but think it will work. Only big problem I have with integration between Asterisk and STS is callerid don't work on SLT ports frown

Please advise if you got anywhere with your solution.

Thanks