Re: Clarification on most universal wave playing/recording format for modems and telephony devices
- From: fdeckerNOSPAMM@xxxxxxx
- Date: 23 Apr 2005 12:54:10 -0700
Hi Angus,
This is one of the many idiosyncrasies of Dialogic cards as well as
many issues with their TSP, some of which is listed on our website
here:
http://www.exceletel.com/support/hardware/dialogic/Index.htm
There is quite bit more, but too much to post, however our support
services has access to it in our knowledgbase.
The standard format most devices use as was stated is PCM
8kHz,16bit,Mono, while the format of choice for Dialogic cards is
11kHz, 8bit. Do not use the Dialogic "VOX" format as they are wave
files without a header and not compatible with anything else. Your
best bet is to code to check the device and give it the correct wave
format, and yes this means recording all the files in the different
formats. To avoid this, you use the ACM as was mentioned, but beware
this converts in realtime and will not work at a certain point
depending on machine speed and the number of lines that are
simultaneously playing wave files.
This is one of the reasons we developed our "TeleSense" technology used
in our TeleTools components, to try and make TAPI and all the the
non-standard features of different pieces of hardware more of the
standard it was supposed to be. Not only that, but developing IVR's is
tedious, so we wanted a component that handles the prompts, retries,
etc without hundreds of lines of code.
Fred
www.exceletel.com
"TAPI tools for telephony programmers"
.
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