[Freeswitch-users] Determine if a number is valid/working

Sean Devoy sdevoy at bizfocused.com
Wed Feb 20 17:14:58 MSK 2013

Thank you for your responses, everyone.


MC: This customer has rejected the idea of calling with a message as bad
marketing!!  In my experience marketing people have their own "logic rules"
and I can never follow their thinking.  And yes, they have 30 customer sales
reps calling these "leads" all day long.  They claim 1/3 of the leads have
invalid phone numbers.  My customer suspects fraud and that someone is
submitting false leads to boost their lead rate and fees.


Ken:  I am not sure we have any language in common - lol.  Where can I learn
what  "ASR and ACD" are? I looked up lidb and lnp already!


Also, the cost of a call compared to the cost of a fraudulent lead (over
$20) is insignificant. 


The ideas I have suggested to my customer, for what it is worth, are
comparing the State (we are in US) for the IP address of the submitter, to
the State on the form and the State of the area code on the form.  In the
situations where they do not agree, prompt the user for permission to robo
call for verification.


From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Michael
Sent: Tuesday, February 19, 2013 2:37 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Determine if a number is valid/working


Well, pretty much the only way to guarantee that a number is working is to
call it and see what happens. I suspect Ken Rice has some experience in this
area and I'd definitely like to hear it. If anyone else has thoughts I'd
like to hear them as well.


P.S. - Why does the customer think that calling the number and playing a
short message will take too long? Also, what is the customer's primary
concern about the web leads having non-working numbers? Is it because they
have humans manually dialing them and it's a waste of time when the person
comes across a bad number?

On Tue, Feb 19, 2013 at 8:40 AM, Sean Devoy <sdevoy at bizfocused.com> wrote:

HI All,


My web site customer's call center claims that 1/3 of their web leads have
nonworking phone numbers.  Short of calling it, is there any way with FS (or
even a paid service) to determine if a given phone number is a working
number?  I would like to make an Ajax SOAP call to a PHP page that checks
(or dials) the number and returns a status for the validity of the phone


I have an LUA script that will call, play a short message and hang up, but
the customer thinks that may take too long.


Any ideas?




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Michael S Collins
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