[Asterisk-Users] Forklift a 2000 phone PBX

[Richard Lyman]

John Breeden wrote:

> 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 :-)
>
.electrician wired a cluster with reverse ground once, i put cat3 25 
pair cable *near* (it less than 1', connected to nothing on that end), 
then 50' away as i hooked up a 8 port multiplexer it roasted (smoking) 
in my lap.  that was exciting.