[asterisk-users] checking if a phone number is UP

[Carlos Alvarez]

A very interesting solution.  Is there any code you'd share for this?

We don't have inbound issues all that often (as far as we know), so I'm
curious whether you had a lot of reliability issues before this, or
possibly we have more problems than we believe.


On Thu, Feb 9, 2012 at 7:59 AM, Bryant Zimmerman <BryantZ at zktech.com> wrote:

> We designed our solution the following way.
>
> We have several land line numbers hooked to an asterisk testing server.
> The testing server places one call every X seconds per line to a number we
> want to test . We cycle through each number in our testing pool. Each
> number on average is tested once every 30 min this can be adjusted by the
> dial rate and the number of test lines in the outbound calling pool.  When
> a call comes from one of our test numbers our inbound dial plans log the
> call and busy's out. So the test call is not answered and no call charge is
> assessed per carrier.  To verify that a test succeeded the testing server
> checks the database after it gets a busy.  By design if a call comes in it
> is checked before any line counts are tested so this method never effects
> the customers line counts.   We also have a full audio/dtmf test that is
> run once a day per number. This means that the first test call of the day
> is actually answered and a DTMF and audio hand shake is done.  Both ends
> log the result in a database.
>
> We catch vendor issues with these methods and it allows us to open tickets
> and resolve issues before a customer knows there might be an issue. Our
> vendors hate the system as we tend to catch any hiccup they may be having
> as well. Several of them are mistified how we can open tickets on issues
> consistently before they know they have an issue.
> Bryant
>
>
> ------------------------------
> *From*: "Aurimas Skirgaila" <a.skirgaila at gmail.com>
> *Sent*: Thursday, February 09, 2012 9:34 AM
> *To*: "Asterisk Users Mailing List - Non-Commercial Discussion" <
> asterisk-users at lists.digium.com>
>
> *Subject*: [asterisk-users] checking if a phone number is UP
>
>
> hi,
>
>  We have a phone number from third party provider which is used for
> inbound calls. How could I monitor if this phone number is reachable?
>
>  the initial idea doesn't sound elegant:
> - on my SIP server I set couple seconds of ringing before Answer().
> - the monitoring server calls to that phone number for few seconds, checks
> if it "hears" the ringing and hangs up the call.
>
>  **
> I use Nagios to check if my services are UP using check_sip, but it this
> situation I'm more concerned about my DID provider than my server. It's
> just like pinging a phone number.
>
>
>
>  Thank you,
> Aurimas
>
>
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-- 
Carlos Alvarez
TelEvolve
602-889-3003
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