TID: PX/Win v7.0 PX28-1176M
MSGID: 1:116/17 15870a16
TZUTC: -0500
->  RW> 3141 is only for OS/2 users runing SIO and its VMODEM.EXE driver for 8-
->  RW> VMODEM-TO-VMODEM communication.

-> small clarification/correction: 3141 is the IANA assigned port number for th
-> vmodem protocol no matter what software implements the protocol or what OS i
-> is used on... the vmodem protocol is a slightly modified form of the telnet
-> protocol ;)

Yeah, but I think SIO's VMODEM.EXE listens on that port by default for
8-bit VMODEM-to-VMODEM connections (using ATDT #