Nп/п : 96 из 100
От : Tommi Koivula 2:221/1.254 02 май 25 17:52:18
К : Wilfred van Velzen 02 май 25 18:04:01
Тема : Weekly nodelist report on noteworthy changes (108)
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@MSGID: 2:221/1.254 6814ddac
@REPLY: 2:280/464 6814ba8e
@CHRS: LATIN-1 2
@TZUTC: 0300
@TID: FastEcho 1.46.1 1530
02 May 25 14:18, Wilfred van Velzen wrote to Tommi Koivula:
WvV>>>> 2:420/333 also got an updated IVM flag, but there is a timeout
WvV>>>> when trying to connect to the advertised port.
WV>>>
WV>>> Another IVM update for this node, and there is now a connect and
WV>>> an EMSI response.
WV>
TK>> How did you test? That`s not IVM in port 2030, it`s ITN.
WV>
WV> I`m not testing the protocol. I just connect to the advertised port
WV> with telnet, and report on what I see. ;-)
You were lucky this time, you were using telnet to connect vmodem,
but it was telnet server indeed. ;)
WV> What is IVM anyway? There are only a few minimal mentions of it in the
WV> FTSC docs:
WV>
WV>
WV> FRL-1016:
WV>
WV> 1.1.8.4. IVM[:3141]
WV> Vmodem protocol according to Ray Gwinn`s SIO-package
WV> for OS/2
From the SIO v1.60 docs:
=== Cut ===
WHAT IS VMODEM
Vmodem is a software implementation of a modem, referred to as a
Virtual Modem. Basically, it attempts to fake out other software
(like terminal programs) into believing they are accessing a real
modem. Vmodem will turn any Terminal into a Telnet Client, and any
BBS into a Telnet Server.
Normal (real) modems provide an interface that allows terminal
programs to pass digital information across telephone lines. Vmodem
does the same thing from the application (terminal) program`s point of
view. However, the other side of Vmodem is not a phone line, but a
digital network like Internet. Thus, Vmodem allows the hoards of
communications programs to pass information across Internet instead of
using phone lines.
In addition to acting as a Telnet server, Vmodem uses a newly designed
protocol for communications networks, called the Virtual Modem
Protocol (VMP). At this time, no other programs have implemented VMP,
thus Vmodem is required on both ends of the connection to use the VMP.
However, VMODEM.EXE will accept inbound Telnet connections from any
system, meaning a BBS under vmodem can be accessed by just about
anyone with an Internet connection.
Future implementations of Vmodem may access networks other than
Internet and use TCP/IP implementations other than IBM`s. The current
implementation of Vmodem works only on Internet, using the Internet
Access Kit (IAK) that is included with OS/2 V3 and IBM`s TCP/IP (for
OS/2) version 2.0, with the August 1994 CSD applied.
A single invocation of Vmodem can service all of the Internet ports
defined in the SIO command line.
=== Cut ===
WV>
WV> FTS-5001:
WV>
WV> IVM 3141 Vmodem connection using FTS-1 or any other protocol
WV> designed for classic POTS and modem.
WV>
WV>
WV> Wouldn`t the node qualify for IVM under the FTS-5001 "definition" ?
Yes. SIO/VModem can accept telnet and vmodem calls. By default ports
ITN:23 and IVM:3141.
`Tommi
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