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normxxx
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USA		Posted - 6/12/2007 4:22:12 PM  Show Profile  Email Poster  Edit Message
I have a Conexant D850 56K V.9x DFVc Modem. It apparently is running v.42bis. I would love to know how I could find out if can use the v.44 protocol and/or how I can install/activate it.
v.Richard
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6222

USA		Posted - 6/14/2007 10:54:49 AM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
In order to use any compression protocol, both modems must support it. Your modem supports it (assuming you have appropriate driver), but, what about the ISP/modem you are calling?
Normally, by default, modem will attempt to use the highest/best standard automatically.

You can check to see whether V.44 is active and enabled in your modem by issuing the command
AT+DS44?
in Hyperterminal connected directly to modem COM port as described at: www.modemsite.com/56k/x2-hyperterm.asp

If the first digit response to the above command is
3, (default), V.44 is enabled.
If you get an error from the command, the modem driver doesn't support V.44.
If you get a 0 as response, V.44 compression is disabled.

The second digit response to above command controls behavior of modem: if it is 1, the modem will disconnect if V.44 is not negotiated when making a connection. If it is 0 (default), the connection will proceed even if V.44 is not negotiated.

You can change either of the parameters with the command
AT+DS44=#,#
To effect a change for dial-up network connections, you would put the command
+DS44=#,#
(where # = the desired parameters)
in extra settings for initialization string.
www.modemsite.com/56k/initmagic.asp

Aloha! Richard.

Aloha! Richard.

normxxx
Tl Posts:
5

USA		Posted - 6/14/2007 6:00:02 PM  Show Profile  Email Poster  Edit Message
Dear Richard--

It feels SO good to talk to my modem!

Thanks. I guess I have v.44 enabled. Is there any way to tell if a particular connection (in particular, my ISP) is using it?

Thanks loads.

normxxx
Tl Posts:
5

USA		Posted - 6/14/2007 6:00:39 PM  Show Profile  Email Poster  Edit Message
Dear Richard--

It feels SO good to talk to my modem!

Thanks. I guess I have v.44 enabled. Is there any way to tell if a particular connection (in particular, my ISP) is using it?

Thanks loads.

v.Richard
Tl Posts:
6222

USA		Posted - 6/14/2007 9:16:53 PM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
In most cases, if the ISP supports V.92, they will also support V.44, although there's no guarantee. Basically, if you have V.44 enabled on your end and you don't get a V.44 connection, it's pretty safe bet that the ISP doesn't support it.

You can make test calls with Hyperterminal to other ISPs that you don't subscribe to and see if you get a V.44 connect - see
www.modemsite.com/56k/usehyper.asp

Aloha! Richard.

normxxx
Tl Posts:
5

USA		Posted - 6/16/2007 9:26:14 AM  Show Profile  Email Poster  Edit Message
Thank you! Thank you! I was apparently using an old telephone line/number originally set up for v.90 and never converted to support v.44. Speeds now regularly top 100kbits when surfing. Of course, 'download' speeds are not noticably greater (since most are quite compressed), but I am about to switch to DSL.

Thanks again.

normxxx

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