[vcf-midatlantic] Minimum requirements for receiving 56K modem connections

John Heritage john.heritage at gmail.com
Sun Jun 30 19:00:34 UTC 2024


Hi folks!

I'm messing around with a bunch of modems at home, and would like to know
what's required to set up one system to receive 56K calls from another
system.

I'm able to get 33.6kbps bi-directionally (or 31.2K) with just a phone line
between the two modems, and using ATX1D and ATA commands.

I think to get 56K I require some equipment to simulate a digital
connection, and I'm also not sure if a 56K analog modem can even receive
56K calls.  Is this true?

Modems I have on hand:
- a USRobotics Courier I-Modem
- 2 x USRobotics V.Everything, and a USRobotics 56K/X2 Sportster external
modem

I am also unable to get the I-Modem to connect to any of the analog modems,
and although it does have the protocols to support analog, it seems like
it's expecting a BRI / ISDN connection to allow that connection.   Is this
true?

If the above are true - what's the minimum / cheapest solution for being
able to at least establish a V.90 connection given the equipment I have
already?

Thanks for your help!
John


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