On Mon, 2004-02-16 at 18:30, Steve Underwood wrote: > Steven Critchfield wrote: > > >On Mon, 2004-02-16 at 07:39, Jean-Marc V. Liotier wrote: > > > > > >>When dialing out, will a call be established significantly faster by an > >>ISDN adapter such as an Eicon Diva server compared to an analogical FXO > >>such as Digium's X100P ? > >> > >> > > > >Analog, nothing logical there. > > > >ISDN will be faster dialing out as you will communicate with asterisk > >via the dialpad where you want to be connected too, and if you are on a > >analog line, asterisk will repeat the digits to the telco switch in > >analog just like you did but at a specific cadence. Since a DTMF digit > >is around 450 to 800 msec, and in that time frame you can transfer all > > > > > Eh? A DTMF digit is about 100ms - roughly 50ms on and 50ms off. Your > overall conclusion is right though. Digital is much faster. On a PRI T1 > some managers complain they only get 23 channels, while they would get > 24 if the used robbed bit lines. However, for lines carrying lots of > short calls the faster call setup on a PRI means it is usually a > significant win overall.
Okay. I was remembering setting my modems to 45, but couldn't remember for sure the measurement. 45 was right before recognition started failing. > >the call setup information digitally, the call could be setup in the > >equivalent of a single digits time, let alone the next 6-10 digits. > > > >Incoming, the calls are again signaled digitally and acknowledged with > >the switch in less time than it takes to make the first half of a ring. > >On analog you will want to wait till the second or third ring to get the > >CallerID, but it was there to start with on the ISDN call. > > > >On my PRI line, calls are answered and prompts played without a single > >ring event being heard by the caller. > > > > > This can be a little confusing for the caller, but thankfully it also > screws up a lot of telemarketer systems. Dialogic et al don't recognise > the phone as properly answered if they never hear the ringback tone :-) We actually had complaints when one of our changes caused answer to be after 2 rings. When we did more changes and made it come back to 1 ring, they where very happy. I can't wait till our clients start the migration to the zero ring system. -- Steven Critchfield <[EMAIL PROTECTED]> _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
