Stephen Bosch wrote: > Trevor G. Hammonds wrote: >> Yuan, >> Well engineered analogue PBXs typically do not use standard loop start >> subscriber lines. When digital trunks are not an option, they use analogue >> PBX and/or DID trunks. At the very least, ground start circuits are >> preferred to avoid "glare". The best call quality for analogue is achieved >> by using four-wire E&M trunks that provide answer and disconnect >> supervision. There are two-wire trunks (which are probably more common), as >> well as different signalling methods. These trunks require special >> interface hardware, and I am unaware of any that work with Asterisk. As the >> cards are typically very expensive, it is usually better to go with digital >> if you require that functionality. It would be nice to see a BRI interface >> for Asterisk that works in North America, as BRI circuits are often >> comparable in price to analogue lines. > > Are BRI circuits what phone companies call "digital" lines for use with > digital sets, such as with digital Centrex? > > I'm not aware that Telus even offers BRI.
Sorry -- BRI is ISDN, not digital Centrex. I'm still not aware that Telus even offers ISDN anymore :) -Stephen- _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
