[asterisk-users] Alphanumeric DTMF !?

[Sammy Govind]

Eric thats really a nice idea to communicate between two or more of "our"
servers.

Make the call to the remote system and send the digits in the "encoded
> string", you will need something on the other end to decode the text.


But the other end is not our's but could be any solution which requires to
feed alphanumeric DTMF that something on the other end could be
a propriety solution like CISCO as I mentioned about its alphanumeric
relay. SO, I can't ask the other end to change.

I'm having a strong feeling that I shouldn't push further into this as
Asterisk has its DTMF methods defined and those don't send Alpha-numeric.
that's it - end of line. :(



On Tue, Feb 28, 2012 at 9:27 PM, Eric Wieling <EWieling at nyigc.com> wrote:

> Just for fun I did something similar at one point.
>
> 0-9 A-D and * and # make a character set of 16 characters, perfect for
> encoding as hex.
>
> Take your string, get the ASCII value of each character, convert it to
> hex, and add it to the "encoded" string.
> Just before dialing, replace all "e" with # and all "f" with * in your
> encoded string
>
> Make the call to the remote system and send the digits in the "encoded
> string", you will need something on the other end to decode the text.
>
> Took about 30 seconds to send "Hello World!" because of limitations in
> Asterisk's maximum digits on Read (about 40 digits) and needing to ACK
> "packets" of 32 characters each and timeouts, etc.  I think I used CRC8 to
> validate the received "packets".
>
> Overall it was a cool hack and totally impractical in the real world.
>
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] On Behalf Of Sammy Govind
> Sent: Tuesday, February 28, 2012 2:53 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [asterisk-users] Alphanumeric DTMF !?
>
> Yeah I know about A-D but can we send more than those !? I've read about
> h245-alphanum thing but that is definitely not in asterisk, so what other
> options are there is I've to send more than just A-D ?
>
>
> On Tue, Feb 28, 2012 at 12:42 PM, Matt Darnell <mattdarnell at gmail.com>
> wrote:
>
>
>        On Mon, Feb 27, 2012 at 8:23 PM, Sammy Govind <govoiper at gmail.com>
> wrote:
>        > Hi list,
>        >
>        > What possibilities are there in asterisk to send an alphanumeric
> DTMF
>        > from/to  asterisk !?
>        >
>        > Regards,
>        > Sammy
>
>
>
>        Do you mean A-D?  You send those just like 0-9*#
>
>        -Matt
>
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