[Asterisk-Users] Analogical FXO vs. BRI dialing speed
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 ? signature.asc Description: This is a digitally signed message part
Re: [Asterisk-Users] Analogical FXO vs. BRI dialing speed
Am Mo, 2004-02-16 um 14.39 schrieb Jean-Marc V. Liotier: 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 ? Yes, ISDN uses digital signalling so call setup times on the last mile (from your NT1 to the telco switch) are close to 0. Also the callerID on incoming calls is available immediately with ISDN (with analog lines you usually get it after the first ring). best regards Klaus -- Klaus-Peter Junghanns CEO, CTO Junghanns.NET GmbH Breite Straße 13 - 12167 Berlin - Germany fon: (de) +49 30 79705390 fon: (uk) +44 870 1244692 fax: (de) +49 30 79705391 iaxtel: 1-700-157-8753 http://www.Junghanns.NET/asterisk/ ___ 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
Re: [Asterisk-Users] Analogical FXO vs. BRI dialing speed
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 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. -- 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
Re: [Asterisk-Users] Analogical FXO vs. BRI dialing speed
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. 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 :-) Regards, Steve ___ 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
