Date: Wed, 31 Jul 2002 12:39:13 +0100 (BST) From: Andrew Gordon <arg-bsd@arg1.demon.co.uk> To: Holger Wolff <wolff@cargex.de> Cc: Andrew Gordon <arg-bsd@arg1.demon.co.uk>, <freebsd-isdn@FreeBSD.org> Subject: Re: ISDN with AVM Fritz ISA Classic Message-ID: <20020731122350.V13298-100000@server.arg.sj.co.uk> In-Reply-To: <000801c23884$5a06f880$7b00a8c0@STARTREK2K.de>
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On Wed, 31 Jul 2002, Holger Wolff wrote: > "Andrew Gordon" writes: > > > > If you want the I4B answerphone to wait before answering (eg. to allow > > your other 'phones time to ring), you want: > > > > alert = 20 > > > > or similar. > > Thanks .. this is exactly what i'm looking for ... but why is it called > alert? Because that is the name of the ISDN protocol message. When there is an incoming call, the exchange sends a 'SETUP' message. If your equipment wants to answer the call immediately it can reply with a 'CONNECT' message. If it doesn't reply at all, the exchange will time out and assume that there is no equipment connected, so there is another message 'ALERTING' that your equipment can send so show that it is ringing the phone and may be able to send the 'CONNECT' message after a while. It would be more obvious if the message was called 'RINGING', but presumably the people that wrote Q.931 decided that some phones might flash or buzz rather than ringing and so chose a more generic word.... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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