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US Robotics 005605 modem and VOIP

Last response: in Networking
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June 10, 2005 7:38:00 PM

Archived from groups: comp.dcom.voice-over-ip,comp.dcom.modems (More info?)

I have a US Robotics 005605 (aka Model 0525) 56k Voice Faxmodem.
The last time I used it was several years ago with a Win 98 OS.
Having converted to Win 2000 pro, I downloaded the USB firmware flash
program for this model from the US Robotics support site.

http://www.usr.com/support/product-template.asp?prod=56...

The problem is that I'm not sure what driver to use. There's a USB
driver
but I can't get a dialtone from my Sipora 2000 VOIP modem with it.
The OS recognizes the modem. Is it possible that it doesn't recognize
VOIP connections?



US Robotics tech support states the following:

"In Control Panel, double-click Modems and remove extra modem entries"

Does that also mean I should remove these options from the Advanced tab?

Microsoft H.323 TAPI Service Provider
Microsoft Multicast Conference TAPI Service Provider
NDIS Proxy TAPI Service Provider
TAPI Kernel-Mode Service Provider
Unimodem 5 Service Provider


I'm going to try using the serial cable now. If anyone has experience
with VOIP and analog modems, please contribute!
Anonymous
June 11, 2005 4:42:33 AM

Archived from groups: comp.dcom.voice-over-ip,comp.dcom.modems (More info?)

1. The Sipura 2000 is NOT a modem, its ATA (analog telephone adapter) which
needs to be plugged into ethernet port of a router.

2. You wont be able to get VoIp working on a dial up 56k connection, it's
not fast enough on the upload leg. I believe it's possible to set your modem
for equal speed both ways in which case you may be able to use softphone
(e.g. Xten Lite).
Regards,
Martin
Anonymous
June 13, 2005 3:18:13 AM

Archived from groups: comp.dcom.voice-over-ip,comp.dcom.modems (More info?)

"Ivor Jones" <ivor@despammed.invalid> wrote in message
news:3gunaqFeesqeU1@individual.net...
> colin@nomailspam.com wrote:
>> I have a US Robotics 005605 (aka Model 0525) 56k Voice Faxmodem.
>> The last time I used it was several years ago with a Win 98 OS.
>> Having converted to Win 2000 pro, I downloaded the USB firmware
>> flash program for this model from the US Robotics support site.
>>
>> http://www.usr.com/support/product-template.asp?prod=56...
>>
>> The problem is that I'm not sure what driver to use. There's a USB
>> driver
>> but I can't get a dialtone from my Sipora 2000 VOIP modem with it.
>> The OS recognizes the modem. Is it possible that it doesn't
>> recognize VOIP connections?
>
> You won't get VoIP working with a dialup modem, there isn't enough
> bandwidth. VoIP requires a broadband connection.

*WRONG*. The Macintosh software "PGPphone" was doing this years ago. Human
speech really doesn't need to bandwidth many people it requires. Several
stupidities of most modern fancy-digital-phone-systems conspire to heavily
degrade the signal, such as the use of automatic gain controls, trying too
hard to keep the signal from clipping, trying to spend all your cycles
processing and analyzing and digitally throbbing the prostate of the signal
in order to try to get it to be more comprehensible by whatever cockeyed
scheme your particular intern thought of, etc., etc.

If you throw out almost all the digital analysis and present just a few bits
of signal, *at the zero crossings* instead of smoothed and merged and FFT'ed
into powerbands and with all the speech timing thrown out, you actually get
a quite intelligible signal.
!