c60a-3hu@e260-1g.berkeley.edu (Calvin Cheng) (03/05/90)
I've just got thss Everex 24E+ 2400bps MNP-5 modem and am thinking of accessing the modem in the MNP-5 mode t connect to campus with a computer- modem speed of 19200bps. It seems that alot of special AT commands have to be sent to the modem before this can be done. I've got little luck fiddling with ZTerm 0.85. Since I'm seriously thinking of using Microphone II for communications, I want to be absolutely sure if this can be done cleanly (and not after some dirty kludges) with Mic II 3.0. By the way, as I'm unfamiliarwith the MNP-5 standard, could somebody please enlighten me on the protcal and the level of standardization among MNP-5 modems (ie what modem is mine equivalent to)? +-----------------------------------------------------------------------+ | Calvin Cheng | | c60a-3hu@web.berkely The Best is Yet to Be! | | calvinc@ocf.berkeley The Best is Yet to Be! | +-----------------------------------------------------------------------+
mjkobb@mit-amt.MEDIA.MIT.EDU (Michael J Kobb) (03/05/90)
In article <1990Mar4.203716.12505@agate.berkeley.edu> c60a-3hu@e260-1g (Calvin Cheng) writes: > >I've just got thss Everex 24E+ 2400bps MNP-5 modem and am thinking >of accessing the modem in the MNP-5 mode t connect to campus with a >computer- modem speed of 19200bps. It seems that alot of special AT >commands have to be sent to the modem before this can be done. I've >got little luck fiddling with ZTerm 0.85. Since I'm seriously >thinking of using Microphone II for communications, I want to be >absolutely sure if this can be done cleanly (and not after some >dirty kludges) with Mic II 3.0. By the way, as I'm unfamiliarwith >the MNP-5 standard, could somebody please enlighten me on the >protcal and the level of standardization among MNP-5 modems (ie >what modem is mine equivalent to)? Hiya, First of all, why the 19.2? With MNP-5 compression, you will be running at 4800 BPS effective throughput on the modems, assuming a good connection. Using a computer<->modem speed much faster than that doesn't really get you much. 9600 might be worth it just so that the modem never, ever has to wait for anything.... Second, the AT commands aren't any too nasty. You'll notice that ZTerm has the "Modem String" option, or somesuch. Why not just set that to the apropriate settings. Or, you could do what I do which is to map a function key in ZTerm (using MasterStrokes) to the apropriate string. Then I can just zap it out to the modem whenever. You can also define multiple strings for different purposes. As for the protocol, in 100 words or less, it uses some form of checksum for error detection, and uses a data compression algorithm which basically removes superfluous leading zeros from bytes and reinserts them on the other end (I think, from the discussion I had with the algorithm's designer... it was awhile ago). I've never used Microphone II 3.0, since I found their upgrade fee to be utterly outrageous, and didn't really like the program much in the first place. ZTerm does everything I need, except really good vt100. I'm hoping... --Mike
svc@well.sf.ca.us (Leonard Rosenthol) (03/06/90)
In article <1990Mar4.203716.12505@agate.berkeley.edu> c60a-3hu@e260-1g (Calvin Cheng) writes: > >I've just got thss Everex 24E+ 2400bps MNP-5 modem and am thinking >of accessing the modem in the MNP-5 mode t connect to campus with a >computer- modem speed of 19200bps. It seems that alot of special AT >commands have to be sent to the modem before this can be done. I've >got little luck fiddling with ZTerm 0.85. Since I'm seriously >thinking of using Microphone II for communications, I want to be >absolutely sure if this can be done cleanly (and not after some >dirty kludges) with Mic II 3.0. By the way, as I'm unfamiliarwith >the MNP-5 standard, could somebody please enlighten me on the >protcal and the level of standardization among MNP-5 modems (ie >what modem is mine equivalent to)? > To begin with let's start with MNP - the MicroCom Networking Protocol - which is now becoming an industry standard for data compression and error correction in modems. You should be able to take advantage of this function-0 ality with any other modem which also supports MNP-5, of which more and more are appearing daily. You can, of course, talk to any other 300/1200/2400 standard modem w/o the MNP extras. Since MNP is hardware specific, in terms of configuring the modem to use the 'auto-reliable mode' (MNP ON), MicroPhone II takes no special actions in supporting MNP, as it does not need to! As long as you have properly configured the modem (using those AT commands), then MPII (and any other comm program) will talk to the modem and if the modem connects to another MNP capable modem then the modems will take advantage of the MNP connection, and the software won't/doesn't care! You can, however, use protocols such as YMODEM-G which will give you 96% (or more) effiecienty in speed due to it assuming an error correctioin connection (ie. MNP On). If you do purchase MicroPhone II, our technical support staff will be more than glad to help you through the setting up of the modem into 'auto- reliable mode' as well as any other help you need. Just a phone call (or EMail messag) away. Leonard Rosenthol Software Ventures MicroPhone II Development Team >+-----------------------------------------------------------------------+ >| Calvin Cheng | >| c60a-3hu@web.berkely The Best is Yet to Be! | >| calvinc@ocf.berkeley The Best is Yet to Be! | >+-----------------------------------------------------------------------+ -- +--------------------------------------------------+ Leonard Rosenthol | GEnie : MACgician Lazerware, inc. | MacNet: MACgician UUCP: svc@well.UUCP | ALink : D0025
Zeff.Wheelock@p1.f450.n101.z1.FIDONET.ORG (Zeff Wheelock) (03/09/90)
>ZTerm does everything I need, except really good vt100. I'm hoping...
The programmer has stated to tell him what you want in VT100 emulation and he
will see what he can do.
Zeff Wheelock
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