Using Speakers + Mic attached to a modem

[TheCotMan]

You don't think that someones Apple Macintosh Portable (M5120) wouldn't be able to handle it?

The computer can do it, but the time to get it on the network might be a hassle. Many old Macs did not have on-board transceicers or ethernet; they only had SuperSerial ports/stuff for LocalTalk. There were some tranceivers made to allow these older macs without transceivers to use Ethernet, but the ones I used had buggy drivers and prone to failure.

...who would be able to supply me with an old version per astcell's standards of its 6.5-Volt, 5 amp lead acid battery?

No need to get an old battery. Just get an old transformer and set the amps/volt and connect the leads. :-) It is still old tech of the era.

[alienSkull]

There is no spoon -- or something like that.

I also believe that they have one in the original Matrix. Right before they remove Neo from the matrix and they are hooking him up. I think Cypher drops a phone into an acustic modem. A very complex one with a self dialing mechanism. <-- because its hard to do that right?!?!?

[lil_freak]

Half the struggle would be getting everything installed and working properly... then the act of launching some attacks may DoS your own box.

You don't think that someones Apple Macintosh Portable (M5120) wouldn't be able to handle it?

Well there goes my chance to see if the darn thing still has anything usefull left in it , but then again who would be able to supply me with an old version per astcell's standards of its 6.5-Volt, 5 amp lead acid battery?

[TheCotMan]

I smell another contest.

Capture the Flag, but no hardware or software used can be newer than 1994.

Half the struggle would be getting everything installed and working properly... then the act of launching some attacks may DoS your own box.

[alklloyd]

They even show one in the movie WarGames.

Not to mention Sneakers.
Al

[astcell]

I smell another contest.

Capture the Flag, but no hardware or software used can be newer than 1994.

[Thorn]

Alright! Alright! I'll get back to it! Jeez...

Hey, shouldn't you be working on an acoustic modem or something?

[FunkyChicken]

Hows the WarSpying Project going thorn?

thats the 3rd now

[Thorn]

Thorn, since we're being totally offtopic - How's the WarSpying Project going?

It comes and goes depending on my time to work on it. A month ago I was able to do some good research on various capture routines and how to improve the really crappy design of v0.1. But I haven't touched it since then, due to being busy with some new clients.

It's funny though, you're the second person to ask about it in three days. Maybe I should make some time to work on it some more.

[renderman]

There was a txt file years ago about how to mod a normal phone into a acoustic coupler just by splicing a 9v battery into one of the lines. Combine that with proper acoustic couple 'cups' for the mic/speakers and you could do it yourself. I know Uncle Ira was selling the cup parts at about DC7

I've actually seen homebrew units like this at 14.4 and 19.2. The quality of the speaker/mic and blocking external noise are key things to watch.

There's no tech, like old tech.

Or maybe there's no techies, like old techies...

Thorn, since we're being totally offtopic - How's the WarSpying Project going?

[Thorn]

In the August 1980 issue of Byte, the Ciarcia's Circuit Cellar column had an article "A Build-It-Yourself Modem for Under $50" (It was reprinted in the Byte Publication book Ciarcia's Circuit Cellar, Volume III.) You may be able to track down a copy of one or the other.

The article was a how to for constructing an acoustic modem. While the circuits involved are obviously long outdated (it was 300 baud max) , the physcal contruction of the acoustic coupler would still apply. Ciarcia designed a split acoustic coupler with closed cell foam that would fit variety of telephone handsets. Also, the article gives a nice little primer on Frequency Shift-Keyed (FSK) modulation, which is the basis for audio communications of this type.



There's no tech, like old tech.

Or maybe there's no techies, like old techies...

[FunkyChicken]

thanks for the help guys.

all i will use it for is to collect my emails when im out camping in the middle of nowhere, in the uk we have an area code which charges for a local call regardless of where u phone from. this is what most ISPs use for their dial-up number.

there are also a few small freefone numbers in which i wouldn't have to pay at all, they must make their money from all the advetising, everytime you connect you have to go through their html connection page with loads of adverts on.

once again cheers for the help, im gonna go on a little reading mission now and see about making my own.

P.s. im currently on a 2MB connection (fairly fast for a home user in the uk), it will be a kick in the teeth trying to surf at a slow speed

P.p.s. i did try using my cantenna from the campsite but i couldn't pick up a thing for a quick wifi link

[noid]

I've seen 9600 baud acoustic coupler connections. Its scary, but there are still companies making them today.

[astcell]

What is the max speed that acoustics can give? 4800 baud? I mean what is the theoretical limit due to the air transfer, not the speed of modems back when acoutical modems were out (300 baud or so).