if i plug my 56k modem into the rj11 of my VOIP modem, will i be able to use dialup?

[BlahBlahYouToo]

as stated in title

 

[techs]

as stated in title

No. As stated in my reply.

 

[TwiceOver]

Digital to Analog to Digital. Awesome.

 

[Eli]

I don't see why it wouldn't work, as long as you're dialing a dial-up number.

It'd be pretty silly, though.

 

[amdhunter]

It should work fine, but might be limited speed. For example, I use Optimum Voice and can only connect at 14.4k on it. You might even have to edit modem strings to connect on your VoIP provider.

 

[Gibson486]

Digital to Analog to Digital. Awesome.

as your name states, it's twice over.

 

[techs]

I forget the exact reason. but you can't.

In fact, I tried it on the Comcast VOIP and someone else tried it on their Skype Voip.

 

[OUCaptain]

Some voip devices and providers will support fax over voip. If it will support faxing, then it might.

But why would you want to?

 

[ecom]

^ Even then the fax device can be picky about the VOIP line.

I was trying to fax something with a fax machine and a USR 56k modem both would send one or two pages and drop the connection repeatedly. After that, I used a Lucent modem on my Thinkpad and that sent it out without issue on the first try.

 

[bruceb]

It probably will not work. VOIP telephones are not quite the same as analog. Internally they get assigned an IP address and as noted they communicate in digital format.

 

[Modelworks]

It can work just depends on the adapter being used. FAX is still used over VOIP and many adapters have a page for configuring it.

Usually the setting tells the adapter that when it receives a fax tone it switches codecs so as not to compress the signal to interfere with the transmission.
On my voip adapter the setting reads:
Fax Mode: T.38 (Auto Detect) or Pass-Through

10 years ago before VOIP FAX and modems went over a modem - digital to analog - phone lines - telco office - analog to digital - other telco office - digital to analog , route all the time converting several times along the way. Even voice was really a form of VOIP because it was cheaper to connect switching centers with digital lines than analog.

About T.38 faxes
http://en.wikipedia.org/wiki/T.38

 

[bruceb]

It may work for an Incoming FAX, but how is an Analog modem card going to pull the dial tone over a VOIP circuit ? I think that is all handled digitally by the VOIP phones. One way to tell for sure is to take an old style 500C (rotary desk) or 1500C (touchtone desk) set and plug it into the VOIP phone jack. If you can get a dial tone, it will work. If not, it will not work.

 

[Modelworks]

It may work for an Incoming FAX, but how is an Analog modem card going to pull the dial tone over a VOIP circuit ? I think that is all handled digitally by the VOIP phones. One way to tell for sure is to take an old style 500C (rotary desk) or 1500C (touchtone desk) set and plug it into the VOIP phone jack. If you can get a dial tone, it will work. If not, it will not work.

The VOIP adapter output 24VDC on the line with dial tone just like a normal telephone jack. It also generates the ring voltage like a regular line. Most people use voip adapters which just provide a jack , you can use whatever phone or fax you already have. People have used my phone and never realized they were using voip. It is just a regular cordless phone, only difference is it is connected to VOIP adapter and not a wall jack. Which is kind of funny really because I have dsl so the phone is connected to the adapter to the modem which then puts it out over DSL which runs through the phone line

 

[bruceb]

Well, if the OP is using something like Magic Jack VOIP then yes, it likely would work. If his VOIP is coming from real VOIP equipment, like a Cisco VOIP switch, then it will not work at that is designed for an IP type telephone set.

 

[Lemon law]

Voip on dial up internet??????????????????????????????????????????????????????????????

Simply will not work, absolutely inadequate bandwidth, when I was on dial up, I beat my head against every wall and it never worked.

Dial up internet is 53 kbits/sec down max and usually far less up, and it takes at least twice that to even have a prayer on VOIP. And most Vanilla dsl able to deliver 4x the down and upload speeds still fails to deliver reliable VOIP.

 

[PsiStar]

The way OP states the question, it sounds like he already has a 56K modem.

So ... try it ... and report back already!!!

If you are wondering if you might short out the internet ... we can only hope, but I am really certain that there will be no ill effects.

And, if you want to go all crazy, try an acoustic coupler. Someone must have 1 someplace.

 

[pitz]

The answer depends upon the type of compression the VoIP gear uses, and whether the two ends an overcome the additional, and unpredictable latency associated with a VoIP connection, versus a traditional circuit-switched connection.

I've heard of it working in some cases, where the VoIP gear wasn't running voice compression. I believe one of the 'tricks' was to install an ADSL filter between the VoIP box, and the modem/fax, to make it work.

 

[Raduque]

Voip on dial up internet??????????????????????????????????????????????????????????????

Simply will not work, absolutely inadequate bandwidth, when I was on dial up, I beat my head against every wall and it never worked.

Dial up internet is 53 kbits/sec down max and usually far less up, and it takes at least twice that to even have a prayer on VOIP. And most Vanilla dsl able to deliver 4x the down and upload speeds still fails to deliver reliable VOIP.

Reading comprehension FAIL.

You have it completely backwards. OP wants to do dialup over VOIP.

 

[vailr]

@ Lemon law:
Voip using a dialup 56k modem is possible, although not so great quality. Maybe 10 years ago, my first use of Voip was via 56k dialup connection, with Net2Phone as the voip provider. Not real great quality, but still usable. The ISP (ATT dialup) actually promoted using Net2Phone over dialup, and provided a $5 startup credit to try it out for free.
There were several other "free voip" providers during the same general time period. Dialpad.com and MediaRing.com were two examples.

 

[Raduque]

Vailr, you also fail reading comprehension.

The OP wants to connected to the internet over his VOIP using a dialup modem, NOT the other way around.

 

[Lonbjerg]

Voip on dial up internet??????????????????????????????????????????????????????????????

Simply will not work, absolutely inadequate bandwidth, when I was on dial up, I beat my head against every wall and it never worked.

Dial up internet is 53 kbits/sec down max and usually far less up, and it takes at least twice that to even have a prayer on VOIP. And most Vanilla dsl able to deliver 4x the down and upload speeds still fails to deliver reliable VOIP.

If anyone has trouble delivering 2 x 128Kb/s of VoIP streams, they need to look at their (lack of?) QoS.

But then again, the slowest line sold by us(work for an ISP) is a 2048/512Kbit line...the bulk of our users run a 10240/1024kbit line, I don't know the state of the ISP market in the US though.

but running VoIp over dial-up....oh the horror.
56/33 Kbits...that is going to hurt.

 

[corkyg]

Highly doubtful that it would work - especially for voice. Maybe a possibility with text or fax only.

Why not try and and let us know what happened?

 

[deimos3428]

If there isn't too much latency/jitter/loss, this will work (assuming your provider doesn't block it for some reason).

As for the issue of VoIP over 56k, that will work absolutely fine with proper compression (G.729 or similar). It's about 15-16k per stream after overhead is considered.

 

[vailr]

Vailr, you also fail reading comprehension.

The OP wants to connected to the internet over his VOIP using a dialup modem, NOT the other way around.

I was replying to Lemon law, not the OP.

 

[vailr]

As for the issue of VoIP over 56k, that will work absolutely fine with proper compression (G.729 or similar). It's about 15-16k per stream after overhead is considered.

Correctamundo.