[asterisk-users] Busy (congestion) signal and cell phones

[Horwich IT Services (Godwin Stewart)]

On Wed, 16 Apr 2008 08:40:42 -0500, Mark Gimelfarb <mark at dawebber.com>
wrote:

> why do cell phones and Gizmo both detect busy tones and terminate the  
> call? Is that a standard behavior?

It *is* standard procedure for a cellphone to terminate a call immediately
it discovers that the called number is busy. It will then, optionally,
initiate its auto-redial function etc.

> Why don't landlines do that?

Because back in the old days there were no intelligent electronics to tell
the user that the call failed. A special "busy" tone had to be generated to
inform the user that they should hang the receiver up manually. Some
traditions die hard.

-- 
Godwin Stewart - Horwich IT services