hey,
well i havent had any experience with the VG but i posted a few things on the same type of issue is was having. these were on 2621 routers with vic-2fxo on nm-2v modules. i couldnt get the call to disconnect immediately and the phones kept on ringing. here are the steps i did to rectify the problem on my ten sites
1. create custom cptone - didnt work
2. create dual detection parameter- didnt work
3. converted pstn line to trunk with COD- didnt work
4. applied custom cptone and dual to voice port with new trunk lines - worked.
one thing to note though is for my scenario i had to specify a supervisory disconnect timing. thus, i had to put in the correct IOS version to support the command "timing sup-disconnect". this was offered in 12.3(13a) or later and 12.3 14T1 or later
not telling you that this would work for you but im telling you i had the same problem with ALL MY SITES and this was the soultion that fixed ALL sites and you actually got immediate disconnect. i have had other sites with 2801 routers and vic2-4fxo cards as well. i dont need the sup-disconnect command for these but I MUST CONVERT MY LINES TO TRUNKS. the reason being that when you convert to trunks you can have more fetures i.e COD. with residential lines there is not real features that can be added. also, converting to trunks will not affect the exisiting operations what so ever. its simply a software configuration from the CARRIER side.
i hope maybe this can assist you. i know for me i was really reaching the end of the line with this problem.i also know that i lost a few brain cells trying to lick it...:)
