Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!apple!arc!chet From: chet@arc.UUCP (Chet Wood) Newsgroups: comp.dcom.modems Subject: should i expect MNP4 to be faster than non-MNP? Message-ID: Date: 15 Jan 90 19:11:49 GMT Sender: news@arc.UUCP Distribution: comp Organization: Advansoft Research Corp, Santa Clara, CA Lines: 37 I recently purchased a Micom model "M3124EH type s1" modem, a 2400 baud number which supposedly supports MNP4. I get lower throughput connecting in RELIABLE mode than in normal mode, as reported by kermit when connecting to a Trailblazer Plus on a Sun, or connecting to an Everex 2400 baud MNP5 modem on another mac. To their credit, Micom sent me another modem to try by Federal Express (pretty good service for a $129 modem ). The head of technical support says that MNP4 "should" be faster than normal mode, but I got the feeling that neither he nor the repair tech he asked actually knew from experience that their modems work this way. The new modem he sent has the same problem-- here are the effective baud rate numbers I get when connected to the everex running the latest version of Mac Kermit, 900 byte packets, a 10KB compressed file in binary mode: non-MNP 1653 reliable 1550 By the way, i have used the everex and telebit together in the past and realized a very significant speed improvement in MNP5 mode. I would not expect MNP4 to be as fast as MNP5, but then, with a compressed file, maybe it should be? Any thoughts on what's happening? Thanks... Chet. -- Chet Wood ~ (408)727-3357 arc!chet@apple.COM . Advansoft Research Corporation chet@arc.UUCP . 4301 Great America Parkway apple!arc!chet . Santa Clara, CA 95054, USA