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From: prc@erbe.se (Robert Claeson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: MNP Level 5 Modems
Message-ID: <1006@maxim.erbe.se>
Date: 27 Oct 89 15:38:16 GMT
References: <32171@ucbvax.BERKELEY.EDU>
Organization: ERBE DATA AB, Jarfalla, Sweden
Lines: 23

In article <32171@ucbvax.BERKELEY.EDU> kipnis@janus.Berkeley.EDU (Gary Kipnis) writes:

>Recently I bought Everex 2400 Baud MNP Level 5 Modem, and the manual said
>that if the other line supports MNP Level 5 protocol and if I have compression
>turned on, I can actually achieve higher transfer rates by increasing
>the transfer speed between computer and modem to say 4800 baud.  

>The two questions are:
>How do I find out if the other line supports MNP Level 5 protocol and if
>it does how do I utilize this "speed up"

We have Microcom AX/2424c's with MNP 5. The modems are set to use 9600bps
on the serial line, regardless of what the actual line speed between the
two modems are. Thus, the modems agree upon what protocol and what speed
to use and notifies the use in the "CONNECT" message. CONNECT 2400/REL,
for example, tells me that "my" modem found a V22bis modem with some kind
of MNP at the other end. It doesn't tell me what the actual MNP level used
is, though, but it doesn't have to. The fixed serial line speed is all that
I really need.

-- 
          Robert Claeson      E-mail: rclaeson@erbe.se
	  ERBE DATA AB