Xref: utzoo comp.sys.att:6042 comp.dcom.modems:3668
Path: utzoo!attcan!uunet!lll-winken!scooter!neoucom!wtm
From: wtm@neoucom.UUCP (Bill Mayhew)
Newsgroups: comp.sys.att,comp.dcom.modems
Subject: Re: AT&T Modem 2224 CEO (need help))
Summary: Why the 8 second dealy?  Try AT\N0
Message-ID: <1563@neoucom.UUCP>
Date: 5 Apr 89 12:27:13 GMT
References: <7753@killer.Dallas.TX.US>
Organization: Northeastern Ohio Universities College of Medicine
Lines: 20


The default condition of the CE02224 is to the AT\N2 if you are
using the "AT" command set.  This is auto MNP mode.  MNP sends
packets to the other end for 7 seconds, trying to sync up.  If
after 7 seconds it doesn't get a valid ACK, it falls back to a
regular connection.  Even if the other end is MNP, it takes a
couple of seconds for the initial handshake.

If the other end isn't MNP, it'll receive a bunch of garbage
characters from your end as the handshake is attempted.  On gettys
that echo back, this can sometimes make your modem think the other
end is MNP, when in fact, it is not.  The symptom is continuous
flashing of the ERR LED on your 2224.

To disable MNP, send the string, AT\N0.  I don't have any idea what
the AT&T operating mode ":" command equivalent is.  The defalut
AT\N2 isn't re-entered when the connection is dropped you have to
manually enter the command when you finish your call.

Bill