Setting serial port to the maximum
can optimize a PCs ability to process data to the theoretical maximum...
Windows was not designed for the Internet (WAN) thus, the serial port setting was not optimized for modem to have a higher data byte flow. Users can now can buy cheap serial port cards to overcome the problem.
Since the introduction of the PCs the serial port act as an interface between the PCs and a modem, which are commonly restricted to serial rates of 115,200 bps and with an ISDN line running at 128,000 bps, the serial port becomes a bottleneck.
As modem performance improves, transfer of data at speeds of 28.8Kbps, 33.6Kbps, 56.6Kbps and 128Kbps and above, they can easily reach the serial port theoretical maximum
Data flow between the serial port and the modem is governed by a Universal Asynchronous Receiver Transmitter UART chip, which can contain no data buffers, single-byte data buffers or 16-byte data buffers.
Guaranteed to solve your problems!
Links to a host of experts to answer all your questions
Why can't I get Internet max-speed?
Having slow Internet throughput? How to tweak your PC's for Internet maximum throughput?
Setting serial port to the maximum can optimize a PCs process data to the theoretical maximum data flow between serial port and the modem is governed by UARTStanford Web Credibility Research Guidelines? 10 guidelines compiled for building the credibility of a website based on three years research that included over 4,500 people
Medical Resources on the Internet?
Slow Internet--want to know where the hang-up is? Ping your ISP server or website you are visiting to figure out which is slowing you down
Spam driving you crazy? In a
few minutes time, you will have the easiest
and most powerful way to stop it
All data flows between the serial port
Most of today's desktop PCs and notebook are equipped with either 8250, 16450, 16550A which contain single-byte data buffers.
Since most serial port cannot transmit or receive data at the maximum rate of 115Kbps, today's modem far exceed serial port capacity.
In system with non-buffered UART each byte of data must be processed before the next arrives, to ensure that data bytes are not lost.
If the data byte is not processed before the next one arrives, a data overrun occurs and the data byte is lost. If this occurs the entire data packet containing the lost byte must be retransmitted, resulting in reduced throughput.
Manufacturers sought to overcome serial port limitations by implementing bus-based modems or intelligent serial boards.
Whatever being done,
More info available on why modem rarely
cheap serial port cards to overcome the problem.
First check your PCs to find out if it is using an older UART chip that is build-into the motherboard or a PCI UART serial card.
Plugging in a newer 16650 UART card into the PCI slot will replace the existing ones or can easily be configured to over-ride the existing build-in mother board UART chip.
www.byterunner.com for 16650 UART
www.lavalink.com 16650 UART PCI or ISA
www.turbocom.com for UART 16750
Chip Buffer Space MAX DTE Rate
16650 - 32byte buffers - 460800 b/s
16750 - 64byte buffers - 921600 b/s
and you didn't back-up?
Prepare for disaster with a back-up
How to double or triple your Internet throughput? Dial-up modem, Network, Cable, DSL, ISDN, whatever...
Useful freeware and shareware software's, tools, listings, anti-spam, VoIP, games download
CGI: What the
Heck Is That?
ęCopyright June 2002 Permission to re-print, please click here