On 7 Oct 2000 14:23:15 -0400, whatshakin <[EMAIL PROTECTED]> wrote:
:The physical length of a signal is not inversely proportional to its
:frequency. It differs depending on the line encoding. Again, a bit is the
:term applied to the signal state. Signal
:states occupy line space.
Point taken. This is the "bits vs. baud" issue. For straight
serial signals where one bit = one baud such as Ethernet and T-1,
they are equivalent. Ethernet relies on this for its collision
detection mechanism. Perlman covers this quite well in Interconnections,
Second Edition. See "Issues in 802.3" starting on page 35.
:Your formula is correct, however, it does not apply very well to finding
:delay propogation over a wire because of the numerous other factors which
:need to be applied additionally. IE: The properties of the wire medium,
:EMF, block coding, IFG, protocol overhead...
The only property of the wire medium which is going to affect it is the
propagation velocity factor. EMF is what makes it work at all. Protocol
overhead won't affect the physical length of a signal element (bit on
ethernet) within the medium. I don't know what IFG is but don't think
that it's likely to change the laws of physics.
--
Jay Hennigan - Network Administration - [EMAIL PROTECTED]
NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/
WestNet: Connecting you to the planet. 805 884-6323
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