Why do we have cross-over cables.

Starting at paragraph 40.4.4.

Thanks.

Sylvia.

Most ALL do actually provide such control. It is referred to as "pulse dialing" and modems allow selection of pulse or tome dialing. Pulse dialing IS make-and-break dialing utilizing "the hook switch" as that is what pulse dialing is.

If you know how to use Google, why be a lazy ditz?

If thousands of iterations are tried at both ends, a matchup will occur within milliseconds. IF that were the way it happens.

Still, it would be meaningless (read negligible)to the observer, and only needs to be done one time when the cable is attached.

Is tome dialing where you throw a book at the phone?

Sure. After you've read the fat manual (RTFM), you throw that at it. Hence FM modulation.

One opens the i ching and picks a tome and speaks it.

Not that you care, but i used to look up to you. Now you are just another prunt. .

You have been "something" for a long time. Not sure you want to hear what that is though.

lse

is

FM modulation - is that like ATM machine?

Old type phone boxes in the UK had the dial linked to the coin mechanism. You had to pay to use the dial. Handset rest pulsing cut that out.

Hannibal Lecter used that trick to make phone calls from prison in the movie _Manhunter_. I used to tap the handset cradle to make free calls as a teenager.

I can't see why it would make the calls free.

Sylvia.

Here you go: And: for the auto detection standard.

Must have been very old. I remember the push button A/push button B type, and then the later ones where you put the coins in when the other party answered (I hated them!). I don't remember any where there was a link between the dial and the coins.

Sylvia.

They were the ones!

Which?

It was always possible to call the operator, or the emergency services, without any coins, so I don't see how there can have been an interlock.

Sylvia.

The 9 and the 0 were OK. It was not possible to get through to anyone else without pressing button A. See 'Atkinson's Telephony' for details.