Autor: Ireneusz Makowski [RENE] (renemawi_at_free.polbox.pl)
Data: Fri 02 May 1997 - 08:56:57 MET DST
Taki sobie cytacik z pliku readme do COMit'a for Windows.
High-Speed Modem Problems
If your high-speed modem will connect only at 2400 baud, it may be an
oldish model that uses a proprietary protocol for speeds faster than 2400
baud. In that case, you can use the higher speeds only when connected to
remote modems that support the same protocol.
Nearly all newer modems support V.42/MNP which allows modems to negotiate
the line speed. Some modems support both a proprietary protocol and the
general standard.
Modem does not work when port speed is set to 14400
This is probably the most common problem reported. And the answer is
simple: Don't set your port speed to 14400; use a setting of 19200.
If your serial port has a 16550 UART then you can set your port speed to
38400. In Windows, the standard COM driver does not work well above 38400
and Receive Overruns will occur. If you do not have a 16550 UART or do not
know what you have then set your port speed to 19200. You can use the
Microsoft utility MSD.EXE included with your Windows system to determine
the type of UART you have. The common ones are 8250, 16450, or 16550 so
look for these numbers under the COM port section.
Receive Overruns are Occurring
You should be using Hardware Flow Control for all DATA communications over
2400 BPS or if you have V42 or MNP enabled in a slower modem.
Jacek Osiecki <joshua2_at_linux.uci.agh.edu.pl> napisał(a) w artykule
<slrn5m7d8a.46.joshua2_at_powercomp.com.pl>...
> Po drugie: Łączy się dziad na 2400 (sic! - pod DOS-owym terminalem łączy
się
> na 14.400 !), Marudzi przez chwilę i się rozłącza. Żadne ustawianie
> parametrów nie pomogło... A - prędkość ustawiona na 115200...
>
To archiwum zostało wygenerowane przez hypermail 2.1.7 : Tue 18 May 2004 - 16:04:43 MET DST