On Tue, 19 Oct 1999, Rajiv Ghai wrote:
|I am using mgetty for dial-in and I have read through a lot of the
|documentation including that on the setserial command. Finally I came to
|the linux compatible modem lists which show some modems dont work properly
|with linux. Now my questions are:
|1. If Linux ppp compression options do not apply to Win98 clients then how
|does one use a modem with V.34 bis, V.42 bis and all the other bisses to
|provide error control and compress the data so I can speed up my ppp
|connection?.
The CCP compression/decompression is software compression done within the
PPP specification, modem compression and error correction are done in the
modem and are configurable to some extent by internal profile settings.
The internal modem profile settings can be changed with the chat program
using the AT commands but not directly by pppd itself.
|2. Is it normal for modems to have different dial-out and dial-in
|capability. I have read that some serial port adapters have this problem
|but is it normal for modems also ?
Modems can have different profile settings for dial-in and dial-out. It
depends on how the profile is set just prior to dialing in or out with chat
or other program. The modem configurations for dial-in and dial-out are
usually set independently of one another.
|3. Finally can some one recommend a good reliable cheap modem which will
|gives them no problems with dial-in to a Linux box using data compression
|from a Win98 box. My budget is around the $20-30 range. (The only one that
Good luck. That range is, even today, rarely seen except with Winmodems
and relatives.
|worked perfectly on dial-in and dial-out was the Best Data 336F which has
|jumpers for COM ports and IRQ's but it is probably no longer available. I
|dont need a 56K modem because the phone lines can't take it)
A final note, some modems won't work with other modems except at lower
speeds. For instance, the V.90 predecessors, the USR X2 protocol and the
Rockwell K56Flex protocols are incompatible, and, AFAIK, neither is
compatible with V.90. Unless a modem is fairly old it should support V.34
(28.8k/33.6k) though.
---
Clifford Kite Not a guru. (tm)
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