(Ethernet issues) RE: [Asterisk-Users] Survey: Grandstream improvements.........

[Jon Pounder]

Personally, I just wire every jack the same way back to the patch panels, 
4pr cat5 or better, terminated in an rj45. Back at the panel wire the blue 
pair to your analog telephony stuff, and the org/grn to your networking. 
Then if you plug in an rj11 you get a phone line, if you plug in a network 
cable that works too. Some would say this is wasteful of wire, but in 
reality the wire is the least part of the cost of a cabling installation. 
Labour far outweighs it.

If you want a physical 10mb/sec subnet for your phones, easy, just patch 
the relevant jacks into that hub/switch, separated from the jacks used from 
your data network.


There are also some ways to stretch this distance limit if you are careful, 
and limit the branching topology of the lan segment.


>This is the same reason why an ethernet cable cannot be over 300 feet.
>The first bit of the ethernet frame must get to the farthest node in
>an ethernet segment before the last bit is transmitted by the originating
>station.  This length is based on speed one bit takes to span the distance
>and the minimum ethernet frame size (64 bytes).
>
>Currently the limit is 5 non-"store and forward" switches/hubs.
>
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