Re: (PM) telnet socket (fwd)

MegaZone (megazone@megazone.org)
Sat, 13 Mar 1999 17:32:50 -0800 (PST)

Once upon a time James Courtier-Dutton shaped the electrons to say...
>> 1. You cannot issue AT commands to PM3 modems.
>You can attach to the PM3 Modem, and type AT and get OK back.
>You can also do ATDT123444 and dial out, and a few other AT commands.

Ok, I over-generalized a wee bit. You can use AT dial strings - but it
does not have an AT setting systme like a 'normal' modem.

>You can set the PM3 to listen on ports (say 6000) and if it receive a telnet
>to that port it passes all traffic to the PM3 Modem. Where you can make
>outgoing ISDN PRI calls using V120 or Anolog. Incoming does not work.

Actually when you set a port for telnet like this you do not connect to a
modem, you connect to the PORT. There is normally no modem assigned to a
port. When you do 'at' and get ok you get it from the HDLC controller
seeing that the line is there. The modem is only grabbed if you issue a
dial string that requires a modem. Otherwise it is all V.120.

And since there is no modem connected to a port until a call arrives,
you cannot 'camp' on a modem and watch for 'RING' and then tell it to answer.
It just doesn't work that way.

-MZ

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