This is the first time I see this forum and I am very supprised of the type of feedback Sysmaster is getting.
We are use their product line Norfa. which is Sysmaster gateway with PBX and Voicemaster for billing and caller ID distribution.
I have been working on this project for 8 months and we are now live in UK. soon will have some US subscribers also.
This service is something like Vonage in US, but it’s hosted.
I don’t know, why the headaches, we had engineer on site for installation and training for a week (paid) and he seemed to be nice and knowledgable.
may be it’s your luck 🙂