[asterisk-dev] Zap outofband busy indication to mobile networks

Tristan Graham - Skymarket Ltd tristan.graham at skymarket.co.uk
Thu Feb 16 06:48:47 MST 2006

Hi Paul,

Had tried that method as well and it seems to have the same issue - in
terms of PRI the traces are virtually identical (equivalent to forcing
out of band even when default is in-band). Land line again has regular
engaged tone, mobile gives same three beeps followed by hangup rather
than busy followed by hangup.


On Thu, 2006-02-16 at 19:21 +0600, Paul Cadach wrote:
> Hi,
> Try:
> Set(PRI_CAUSE=17)
> Hangup
> WBR,
> Paul.
> ----- Original Message ----- 
> From: "Tristan Graham - Skymarket Ltd" <tristan.graham at skymarket.co.uk>
> To: "Asterisk Developers Mailing List" <asterisk-dev at lists.digium.com>
> Sent: Thursday, February 16, 2006 6:32 PM
> Subject: [asterisk-dev] Zap outofband busy indication to mobile networks
> > Hi folks,
> > 
> > Got an oddity that a user has raised to do with busy signalling and 
> > inparticular when calling from a mobile phone. It seems that the 
> > behaviour when calling * is slightly different to the norm i.e. If I 
> > call an engaged landline number directly from my mobile then the mobile 
> > gives engaged tone plus displays "number busy" then hangs up. If however
> > I call * and pass the call simply to "Busy" then I get either the 
> > regular engaged tones (priindication=inband) or three short tones 
> > followed by hangup (priindication=outofband). The latter is closest to
> > what normally happens but does not indicate busy as intended. I
> > initially thought this might be down to the fact its iSDN but I have
> > tried a similar test using a-n-other PBX on an iSDN 30 and that seems to
> > act normally. Landline caller receives engaged tone as expected.
> > 
> > Can anyone verify this behaviour and tell me if it is normal or bug
> > worthy ?
> > 
> > This is tested on asterisk 1.2.4, caller on UK mobile network and *
> > connected using Zap E1 direct to telco hardware with SS7 onto network.
> > 
> > Tristan.
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Tristan Graham
Network Manager
tristan.graham at skymarket.co.uk
Tel : 0870 474 8888 - Fax : 0870 474 8899
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