Thanks a lot all, Now my view is clear ... On Sun, May 29, 2011 at 3:15 PM, Gordon Henderson < [email protected]> wrote:
> On Sun, 29 May 2011, virendra bhati wrote: > > Hi List, >> >> I have stupid question but I want to know it. Why we use the PRI insted of >> BRI ? Just for the sake of number of lines or any thing else ? >> > > It probably depends on your country. > > In mainland europe (or maybe just Germany), ISDN2e (BRI) is very popular - > not uncommon in home installations too. > > In the UK, it's almost the standard in small businesses - the migration > path seems to be from a single line to 3 lines sharing the same number to > ISDN2e... > > There was a push in the UK to support BRI in the home (~10 years back, > under the name Home Highway), but it came at a time when ADSL was almost > upon us, and BT in their infinite wisdom removed a lot of the ISDN features > that make it actually useful... > > I don't think BRI ever caught on in the US - It was analogue or PRI (or > channelised/fractional T1 or whatever it's called) Probably made it much > easier for the telcos to support (and afford) > > > And why SIP is used for making calls rather then IAX? Even we know IAX >> takes >> 1 channel for making calls? >> > > SIP is an open standard that's been around since the late 90's. IAX, which > is also open and free was only just accepted as a standard last year, but > even so, there's inertia. Very few phone manufacturers are using it - why > should they, when they've been using SIP for years, and the same PBX that > works with IAX also works with SIP... (And does any other PBX support IAX > yet?) > > Gordon > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > -- ----- Thanks and regards Virendra Bhati +91-9172341457 Asterisk Engineer
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