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woo
Tl Posts:
2

Canada
Posted - 10/6/2006 1:45:36 AM  Show Profile  Email Poster  Edit Message
A question about dialup modems. Are there any modems that will disconnect a phone plugged into the secondary phone jack on the modem?
I ask this because I would like to disconnect all other devices from my single phone line when using the modem in an effort to improve line quality.
Thanks
v.Richard
Tl Posts:
6222

USA
Posted - 10/10/2006 10:26:43 AM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Yes - many of the older V.90 and V.34 modems with electro-mechancal DAA (relay) are wired that way.
In fact, some of the earlier V.92 modems did it as well (which meant that for MoH, the 'phone' jack on the modem couldn't be used - a splitter is required).

I don't know that it would be easy to determine whether any particular modem is wired that way without actually testing it in operation. (The modems that Modemsite sold - the Lucent/Agere LT Winmodem made by Lectron (which no longer makes modems), and the Agere Softmodem model F5 made by Lectron would cut the 'phone' jack off when modem was off hook. Lectron model F7 Agere Softmodem would not cut the phone jack off.)

Aloha! Richard.

woo
Tl Posts:
2

Canada
Posted - 10/10/2006 12:16:41 PM  Show Profile  Email Poster  Edit Message
Thanks for the reply Richard.
I thought modems used to be that way, but in trying to buy a new modem the salepeople say "no, modems don't do that!".
Can't think why the manufacturers would drop this feature.
Do you know of any presently available new modems that have this feature. I want one so that I can get all other devices off the line when the modem is in use.
v.Richard
Tl Posts:
6222

USA
Posted - 10/10/2006 12:23:06 PM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Why newer ones don't do it:
(1) Modem-on-hold/V.92 -- modem on hold doesn't work correctly if a telephone is plugged into a 'phone' jack that disconnects with modem off-hook;
(2) Cheap/solid-state DAA's: harder/more expensive to build a modem with solid-state DAA that does this.

Aloha! Richard.

Tim_Itch
Tl Posts:
2

United Kingdom
Posted - 10/10/2006 1:44:44 PM  Show Profile  Email Poster  Edit Message
Hi,
I think I need a similar device.

My friend is blind and uses MS Dialer with the Windows address book to autodial his contacts and then he picks up a handset to talk. A recent PC upgrade means his internal modem only has a line out and no phone jack so his handset is on a parallel line and therefore the connection isn't disconnected when he puts down the handset at the end of the call.

Can you identify a modem with a phone jack that will disconnect when the phone handset is replaced

Thanks

v.Richard
Tl Posts:
6222

USA
Posted - 10/10/2006 3:24:31 PM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Is the PC running Windows XP? The dialer that comes with XP includes a disconnect call / close button, and I would expect that no matter what type of modem is used, without clicking the disconnect (or the equivalent), the problem Tim_Itch describes would remain (in other words, the dialer program will leave the modem off hook after dialing and until disconnect is clicked).

Aloha! Richard.

Tim_Itch
Tl Posts:
2

United Kingdom
Posted - 10/11/2006 4:20:50 AM  Show Profile  Email Poster  Edit Message
Yes XP SP2 is running. I'll investigate the disconnect fucntions.
Thanks for your help
zepper
Tl Posts:
28

USA
Posted - 10/15/2006 9:49:51 AM  Show Profile  Email Poster  Edit Message
Most US Robotics and Zoom full hardware modems did that, but I'm not sure about now for the reason mentioned above - v.92 MOH (modem-on-hold) function. You can use an "Answering Machine Message Blocker" plug to achieve the same function as the old modem coutout of the extension phone. Here is one at BGMicro.com for $1.99 each: http://www.bgmicro.com/prodinfo.asp?sid=04799074074074077112319202&prodid=CAB2055&page=1&cri=answering&stype=3
Radio Shack used to carry them too (not sure about now), but their ridiculous price was near $10.00! <eek!>
. It looks like a duplex phone jack adapter but one hole is marked PHONE, and the other is marked ANS (for answering machine). Plug your modem into the jack marked phone and your extension phone into the jack marked ANS. When you are on line with your modem, the local extension phone will be blocked. If you need to block other phones around the house, just plug one of these units into each jack and plug the phone into the ANS jack - all ANS jacks on the same phone line will be blocked when the modem is on line.

.bh.

Edited by - zepper on 10/15/2006 10:17:27 AM

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