[asterisk-users] Occasional call from "asterisk"

[Bruce B]

We experience exact same thing on DAHDI with Sangoma USB FXO device on short
circuited lines. Phantom calls are actually due to a short in the lines that
happen occasionally.

-Bruce

On Thu, Apr 7, 2011 at 7:16 PM, Warren Selby <wcselby at selbytech.com> wrote:

> On Thu, Apr 7, 2011 at 4:53 PM, Brian Henning <bhenning at pineinst.com>wrote:
>
>> Hi,
>>
>> Now and then our SIP phones ring with "asterisk" showing as the caller-ID.
>> Upon picking up the receiver, there is about five seconds of silence and
>> then the channel is closed (hangup).  Can anyone offer some insight?
>>  Here's
>> relevant snippets from my extensions.conf and Master.csv log:
>>
>
> <snip>
>
> I've seen this on cases where a "phantom" call comes in on a DAHDI channel
> - these calls were the results of faulty wiring on the part of the telco.
> Check your logs for any errors on your DAHDI channels around the time of the
> "ghost" calls.
>
> It could also be a case of someone calls in and then hangs up before the
> call is actually passed to asterisk, and the telco is just slow to hangup
> the call.
>
>
>> As an aside, the Set(CALLERID...) bit doesn't work.  The idea was to
>> prepend
>> a 9 so that a SIP user could use the "redial" feature of the phone's call
>> log to return a missed call (automatically including the 9 for outside
>> line).  Unfortunately the 9 does not get prepended.
>>
>
> Your Set() syntax is wrong.  Try this:
>
>
> exten => s,n,Set(CALLERID(num)=9${CALLERID(num)})
>
> --
> Thanks,
> --Warren Selby, dCAP
> http://www.selbytech.com
>
> --
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