> ISDN TAs connected to a PC's serial port offend my engineer's
> soul. ISDN is
> a synchronous technology. There are no start and stop bits (so 1000 bits
> down an ISDN line = 125 bytes of data, whereas 1000 bits of data down an
> RS-232 cable = 100 bytes of data). So, a PC using a serial TA is busily
> converting an 8 kbyte/s data stream into asynchronous serial
> data, which is
> being re-converted into synchronous data by the TA. This leads to poorer
> latency figures with a serial TA than with a PCI/ISA ISDN card.
Well, to be fair, this conversion should be happening on
a byte-by-byte basis, therefore the additional latency should
be of the order of a byte time, ie (1/11520) = 87uS.
Maintained by the ILUG website team. The aim of Linux.ie is to
support and help commercial and private users of Linux in Ireland. You can
display ILUG news in your own webpages, read backend
information to find out how. Networking services kindly provided by HEAnet, server kindly donated by
Dell. Linux is a trademark of Linus Torvalds,
used with permission. No penguins were harmed in the production or maintenance
of this highly praised website. Looking for the
Indian Linux Users' Group? Try here. If you've read all this and aren't a lawyer: you should be!