[Asterisk-Users] Forklift a 2000 phone PBX

[John Breeden]

tmassey at obscorp.com wrote:

>asterisk-users-bounces at lists.digium.com wrote on 03/24/2005 06:42:24 PM:
>  
>

>Now, how do you know if the wiring is truly Cat3?  Just because the raw 
>wire is Cat3 means nothing if they wrapped it around a few fluroescent 
>lights...  ;)
>  
>
Acually, the first demo of 10baseT at Interop after the standard was 
passed was 100 meters of DIW (now cat3) wrapped around a fluroescent 
lamp and a 5 horsepower electric motor.

I can verify from experience it won't work in the presence of electric 
arc welders :-)

The original ieee 10baseT standard stated DIW (now cat3) wiring, 
fluroescent lights had no effect on the ber (unlike, at the time token 
ring). Originally, 110 blocks were used for termination, at least by 
ATT  (ATT SystemMax wiring). The original standard assumed voice/data in 
the same bundle, (ie: ring voltage also had no effect on the ber).

BTW: You could bring down token ring over unshielded wire with a radar 
gun (we used to do it to IBM at Interop :-)