Genuity is one. As a former customer, the service was good, I'd hope they have worked out some more bugs (specifically with echo). They can support both H323 or SIP. As a shareholder, please go with genuity. Also as a shareholder, i'd be careful, company isn't doing so well. The products are good and the people are top knotch, I hope they can turn things around.
We've looked at AT&T as well, looked like a good solution. I believe they can only handle H323, not sure. Cost was definately an issue.
Delta Three also a good provider, looked hard at them, cost was the defining factor. Seemed like top knotch people.
Another source is Appia, really interesting solution. They can handle H323 and CCM inter-cluster trunks. Pricing was very competitive.
We're in a holding pattern currently with off-loading some of our VoIP LD. Appia and Delta three are my two picks right now. There may be some other players out there now.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.