asterisk users - Mar 2017 - Alphabet character in destination number (CDR)

Dear all,

I have PBX with asterisk 13.x

a couple of IPPhone that connect to that asterisk PBX send an alphanumeric
dialed phone number.

for example, in my CDR table, field DST, it show dialed phone number like
- 0C81318304632C  (it should be 081318304632)
- 08D11157112 (it should be 0811157112).

Why it's happening ? and how can I prevent it to happen ?


Thanks in advance,


Ikka
Jakarta  - Indonesia
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Hi Ikka,

The last time I had this kind of problem the numbers in DB were altogether
different and the reason for that was inappropriate columns data-types in
DB.
You can also print out some CDR(${variable}) AFAIK in the dialplan and
verify that those are in original condition there or not.

Regards,
Sammy


On Thu, Mar 30, 2017 at 10:41 AM, Ikka Tirtawidjaja <ikka.tirta at
gmail.com>
wrote:
> Dear all,
>
> I have PBX with asterisk 13.x
>
> a couple of IPPhone that connect to that asterisk PBX send an alphanumeric
> dialed phone number.
>
> for example, in my CDR table, field DST, it show dialed phone number like
> - 0C81318304632C  (it should be 081318304632)
> - 08D11157112 (it should be 0811157112).
>
> Why it's happening ? and how can I prevent it to happen ?
>
>
> Thanks in advance,
>
>
> Ikka
> Jakarta  - Indonesia
>
>
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On Thursday 30 Mar 2017, Ikka Tirtawidjaja wrote:
> Dear all,
> 
> I have PBX with asterisk 13.x
> 
> a couple of IPPhone that connect to that asterisk PBX send an alphanumeric
> dialed phone number.
> 
> for example, in my CDR table, field DST, it show dialed phone number like
> - 0C81318304632C  (it should be 081318304632)
> - 08D11157112 (it should be 0811157112).
> 
> Why it's happening ? and how can I prevent it to happen ?
A, B, C and D are actually valid DTMF digits  (they belong in a column to the 
right of 3, 6, 9 and # respectively, and have the "high" frequency
1633 Hz).
TTBOMK they were never actually used for anything in practice, they just keep 
kicking around like a vestigial organ  (compare how computer software for the 
UK financial industry still includes code to deal with mediaeval pounds, 
shillings and pence).  

Is it possible for a 1633 Hz tone, loud enough to swamp the "high"
frequency
of a dialled digit, to be finding its way somehow into the microphone of the 
affected phone and confusing it when digits are dialled?


-- 
JM

Note:  Originating address only accepts e-mail from list!  If replying off-
list, change address to asterisk1list at earthshod dot co dot uk .

J Montoya or A J Stiles wrote:
> On Thursday 30 Mar 2017, Ikka Tirtawidjaja wrote:
>> Dear all,
>>
>> I have PBX with asterisk 13.x
>>
>> a couple of IPPhone that connect to that asterisk PBX send an
alphanumeric
>> dialed phone number.
>>
>> for example, in my CDR table, field DST, it show dialed phone number
like
>> - 0C81318304632C  (it should be 081318304632)
>> - 08D11157112 (it should be 0811157112).
>>
>> Why it's happening ? and how can I prevent it to happen ?
> A, B, C and D are actually valid DTMF digits  (they belong in a column to
the
> right of 3, 6, 9 and # respectively, and have the "high"
frequency 1633 Hz).
> TTBOMK they were never actually used for anything in practice, they just
keep
> kicking around like a vestigial organ  (compare how computer software for
the
> UK financial industry still includes code to deal with mediaeval pounds,
> shillings and pence).
>
> Is it possible for a 1633 Hz tone, loud enough to swamp the
"high" frequency
> of a dialled digit, to be finding its way somehow into the microphone of
the
> affected phone and confusing it when digits are dialled?
>
>
A,BC & D were used in the US in the AutoVon Military system, and telephones
that have that keypad often bring pretty good money.

Some external Voice mail systems use one or more of the codes as well ( Toshiba
systems for one ) Probably because they are an easy way to prevent most users
from messing around in the system
It was and in some cases still used for network signalling.
Not that computer telephony designers believe in standards but the 16 button
tone pad is an ITU-T standard.  I believe in the UK it is known as MF-4

Asterisk DTMF detection leaves a lot to be desired. It certainly is not Exchange
grade. There may be a way to diddle the code to remove the false detection but
this should only happen with in-band signalling.I thought all SIP data was
normally sent as data though sip.conf does allow in-band


John Novack

-- 

Dog is my Co-pilot