roh@gmdzi.gmd.de (Peter Rohleder) (04/05/91)
Recently I purchased the Teleport-ADB-Modem from Global Village. It includes MNP 5. In the manual I read: "Turn MNP Level 5 off if you are sending/receiving non-text documents or applications which have been compressed using a file compression utility such as 'StuffIt'. The MNP Level 5 data compression algorithms do not work well on compressed data and may degrade your file transfer performance." Since most files which you can download from Bulletin Boards or commercial networks are compressed it probably has no great sense to own an MNP5-Modem. What do you think ? Peter Rohleder --------------------------------------------------------------------- Peter Rohleder, roh@gmdzi.UUCP, (+49 2241) 14-2208 German National Research Center for Computer Science (GMD) Schloss Birlinghoven, P.O.Box 1240, D-5205 St. Augustin 1, FRGermany ---------------------------------------------------------------------
dorner@pequod.cso.uiuc.edu (Steve Dorner) (04/05/91)
In article <4470@gmdzi.gmd.de> roh@gmdzi.gmd.de (Peter Rohleder) writes: >"Turn MNP Level 5 off if you are sending/receiving non-text documents or >applications which have been compressed using a file compression utility such ... >Since most files which you can download from Bulletin Boards or commercial >networks are compressed it probably has no great sense to own an MNP5-Modem. If the sole use of your modem is downloading macbinary stuffed files with [XYZ]modem, that may be true. If you do any interactive work where you're actually looking at the screen, you'll appreciate the error correction that MNP (4 or better) buys you, and possibly the compression. Kermit uses 7-bit data, right? MNP-5 would help on such transfers. Finally, if you ever want to use Eudora over a modem, I strongly suggest MNP capability (4 or better). -- Steve Dorner, U of Illinois Computing Services Office Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner
cfejm@ux1.cts.eiu.edu (John Miller) (04/06/91)
In article <1991Apr5.145642.3715@ux1.cso.uiuc.edu> dorner@pequod.cso.uiuc.edu (Steve Dorner) writes: >In article <4470@gmdzi.gmd.de> roh@gmdzi.gmd.de (Peter Rohleder) writes: >>"Turn MNP Level 5 off if you are sending/receiving non-text documents or >>applications which have been compressed using a file compression utility such >... >>Since most files which you can download from Bulletin Boards or commercial >>networks are compressed it probably has no great sense to own an MNP5-Modem. > >If the sole use of your modem is downloading macbinary stuffed files with >[XYZ]modem, that may be true. > >If you do any interactive work where you're actually looking at the screen, >you'll appreciate the error correction that MNP (4 or better) buys you, >and possibly the compression. > >Kermit uses 7-bit data, right? MNP-5 would help on such transfers. > >Finally, if you ever want to use Eudora over a modem, I strongly suggest >MNP capability (4 or better). >-- >Steve Dorner, U of Illinois Computing Services Office >Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner Most (almost all?) downloads are binhexed after "stuffited." Therefore, the caveat wouldn't affect them in this way (right?). I regularly use the Teleport with Z-modem (using MNP5) and find that the transfer rate is significantly higher (with no problems so far) than it is without. John
dorner@pequod.cso.uiuc.edu (Steve Dorner) (04/08/91)
In article <1991Apr05.200231.12096@ux1.cts.eiu.edu> cfejm@ux1.cts.eiu.edu (John Miller) writes: >Most (almost all?) downloads are binhexed after "stuffited." Therefore, >the caveat wouldn't affect them in this way (right?). The commercial services (GEnie, CompuServe, ...) don't BinHex things, they have them in MacBinary. I dunno about the Mac BBS systems. -- Steve Dorner, U of Illinois Computing Services Office Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner