🚀 go-pugleaf

Barry Smith wrote:

Useful stuff about networking.

> I'd advise adhering rigidly to the limits if you anticipate ever running
> the network at speeds > 10MHz.

Absolutely. And even at 10Mbps

> Finally, fibre will handle considerably more than 1km inter-repeater
> distance if you specify monomode fibre. Sorry, but I don't have precise
> figures to hand.

What I have is as follows. I've never actually gone anywhere near 
these limits, so can't comment.

   When a transmission path consists of four repeaters and five segments,
   up to three of the segments may be mixing and the remainder must
   be link segments. When five segments are present, each fiber optic
   link segment (FOIRL, 10BASE-FB, or 10BASE-FL) shall not exceed
   500 m, and each 10BASE-FP segment shall not exceed 300 m.

   When a transmission path consists of three repeater sets and four
   segments, the following restrictions apply:

a. The maximum allowable length of any inter-repeater fiber segment
shall not exceed 1000 m for FOIRL, 10BASE-FB, and 10BASE-FL segments
and shall not exceed 700 m for 10BASE-FP segments.

b. The maximum allowable length of any repeater to DTE fiber segment
shall not exceed 400 m for 10BASE-FL segments and shall not exceed
300 m for 10BASE-FP segments and 400 m for segments terminated
in a 10BASE-FL MAU.

From IEEE 802.3 Standard, Section 13
------------------------------------
Segment      Max    
Type         Length 
--------------------
10BASE5 Coax  500   
10BASE2 Coax  185   
FOIRL        1000   
10BASE-T      100*  
10BASE-FP    1000   
10BASE-FB    2000   
10BASE-FL    2000   
Excess AUI     48   
----------------------------------------------------------------------------
*Actual maximum segment length depends on cable characteristics.

I'm sure there's now enough information to sove the problem 
originally posed, and much more besides.

Best wishes,
-- 
Michael Salem