I just thought I'd share my experiences with the VSS2 in case it helps someone.
In the last 12 months, I've had the VSS2 running successfully with 4 different routers, and 2 different ISPs:
Routers:
Draytek Vigor 2600Vgn
Draytek Vigor 2850Vn
BT Business Hub (HGV-2700)
BT Business Hub 3
ISPs
BT Business Broadband
BT Infinity for Business
The Draytek 2600 took several hours to configure. The Draytek 2850 took a couple of hours or so to configure, and both BT Business hubs worked straight out of the box.
My latest incarnation is BT Infinity with Draytek 2850Vn.
The only thing I haven't sorted out yet is DATA (i.e. internet access) on the phone - the VSS works fine for calls and SMS.
Initially, exactly 10 mins after booting the VSS, configuration stopped, leaving just the power light.
After much head-scratching (I had implemented all the VSS troubleshooting tips for the "power light only" tips, EXCEPT raising MTU to 1500, as the Vigor 2850Vn only allows MTU up to 1492 under PPPoe), I thought I'd try adjusting the MTU via telnet, hoping that the Vigor wouldn't be clever enough to enforce the 1492 maximum via telnet (command = "wan mtu 1500", followed by "wan mtu size" to confirm). Lo and behold, as soon as I did this the VSS fired into life and re-started its configuration routines (2 white lights flashing).
After 90 mins I was up and running.
Still haven't figured out how to get mobile data/internet with BT Infinity/Vigor 2850Vn, so for the meantime I'll have to use Wifi in the house.
At the risk of confusing matters, I have since dropped the MTU back (to 1492), and rebooted the VSS and nothing changed (i.e. calls OK, SMS OK, data/internet not OK), which I certainly can't explain!
I'd be happy to help anyone with settings for any of the above routers.
By the way, the one thing I didn't think to check, is whether the BT Business Hub 3 also had the data/internet problem, as I ripped it out as soon as I saw the VSS appeared to be working. If anyone is really keen to know, I'll temporarily replace it to find out.
BT had been good enough to agree to allow me to cancel the 24m BT Infinity contract if I couldn't get the VSS to work (with their equipment)
