[asterisk-users] Spurious hangups on zaptel interface

[Eric "ManxPower" Wieling]

Barry D. Hassler wrote:
> We seem to be getting unexpected hangups on our * system, very
> consistent when calling particular numbers that we can associate with a
> clients phone system. These hangups generally occur when our call is
> transferred within their system (to voicemail usually). 
> 
> I'm suspecting their may be some sort of "flash" (for lack of a better
> term) on the called side, but I can't verify this. 
> 
> the situation does appear to be consistent and reproducible, but only
> with specific phone systems that our calls go through.
> 
> Has anyone else experienced this, or have any potential resolutions?
> I've researched this quite a bit, but not turning up anything
> particularly relevant.
> 
> I am using asterisk 1.2.9.1

Remove busydetect=yes and callprogress=yes from your 
/etc/asterisk/zapata.conf