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- Path: eng.paradyne.com!dmcallister
- From: dmcallister@eng.paradyne.com (Dan McAllister)
- Newsgroups: comp.dcom.modems
- Subject: Re: modem/cellular phone
- Date: 4 Mar 1996 19:39:39 GMT
- Organization: AT&T Paradyne / Wireless Technology
- Distribution: world
- Message-ID: <4hfgtr$1mj@pdn.eng.paradyne.com>
- Reply-To: dmcallister@eng.paradyne.com
- NNTP-Posting-Host: dgmpc.eng.paradyne.com
-
- av383@FreeNet.Carleton.CA (Brian Gamberg) writes:
-
- > I'm trying to use a modem/cellphone combination to connect to
- > several servers, and I'm getting mixed results. Using a Microcom
- > FAST ES modem, restricted to a carrier of 7200, I can successfully
- > connect to a LINUX based server with USR courier modems. However,
- > the same setup connecting to a LINUX based server with USR Sportster
- > modems fails 9 times out of 10. (the same connection works fine
- > using normal telephone lines). Any ideas on what I'm doing wrong?
- > Do I need a special cellular modem?
-
- Brian,
-
- It sounds like the USR Courier modems you are using support the MNP-10
- protocol (that Microcom uses for cellular calls), whereas the Sportsters (at
- least yours) apparently do not. Restricting your modem to 7200 while using
- MNP-10 (support on both sides required) may not be necessary, depending upon
- your cellular modem and local cellular conditions. Using MNP-10 (again, on
- both ends) 9600 bps can usually be sustained. However, if one end of the
- connection does not support MNP-10, you're outta luck.
-
- You may want to check your USR modems and/or cellular modem setups.
-
- Of course, I could go into how much better "our" ETC protocol is (over
- MNP-10)... but I'll abstain this time.
-
- Hope this helps explain your (possible) performance problems...
-
- Dan
- =================================================
- Dan McAllister, Consultant Firmware Engineer
- AT&T Paradyne / Wireless Technology
- E-Mail: d.mcallister@pdn.paradyne.com
-
-
-