Thread: real competition to VM???
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Old 11-11-2007, 16:02   #13
on in an hour!
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on in an hour! has reached the bronze age
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Re: real competition to VM???
Quote:
Originally Posted by Sirius View Post
OK here we go Cable 101 "Ex C&W"

DN

A DN is the Distribution Node and is where the Fibre from the Exchange terminates. There is normally 4 in a ring configuration allowing for diversity via a A route and a B route fibre. The DN contains the power supplies, CATV, And Telco equipment. There is also battery backup for that cabinet. Some areas now have a extra DN to allow for expansion.

BN

A BN is the block node and is fed from the Dn's via 50 pair cables and coax cables. This is where your DROP cable from your house is terminated. Each block node is capable of feeding upto 50 customers and is normally no more than 300 meters from your house.

I will try to put a drawing together to show this.
48 for CATV
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