On 12/4/06, Hensel, Daniela <[EMAIL PROTECTED]> wrote: > Hi Bob, > > thanks for your prompt answer. Does this mean, that a flash initiated by > analog phones can be transformed into a DTMF event (e.g. by a gateway) and > carried over SIP network?
Yes, provided that there are lines something like this in the SDP exchanged in INVITE - 200 OK: a:fmtp 101 0-16 Typical, and default, is to support 0-15, which are the DTMF digits, but 16 is for "flash", and there are many others. RFC 2833 is the reference, I think. > > Daniela > > Sorry, but what means HTH? (I) Hope This Helps. Maybe you know this expression: "viel Glueck" > > -----Ursprüngliche Nachricht----- > Von: Bob Beers [mailto:[EMAIL PROTECTED] > Gesendet: Freitag, 1. Dezember 2006 20:50 > An: Hensel, Daniela > Cc: [email protected] > Betreff: Re: [Sip-implementors] RFC 2833 > > > On 12/1/06, Hensel, Daniela <[EMAIL PROTECTED]> wrote: > > Can anybody tell me, what is meant with "Flash" in RFC 2833? > > > > This is a signal that an analog phone can send into the system. Often > called "flash hook", it is caused by a momentary press and release of the > button on which the handset would rest while "on hook". Picking the > handset off the cradle causes an "off hook" indication. Putting the > handset onto the cradle causes an "on hook" indication. So, a "flash", > or "flash hook" is actually an "on hook" followed suffuciently quickly by > an "off hook". Many analog systems use this "flash" as a signal for > conducting call transfers or switching between calls in a call-waiting > scenario. > > > Thanks, > > Daniela > > HTH, > -Bob > ########################################### > > This message has been scanned by F-Secure Anti-Virus for Microsoft > Exchange. > For more information, connect to http://www.F-Secure.com/ > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
