[BC] Phone System & VOIP Question

[Mike McCarthy]

Not always the case.  Some equipment, older Telos in particular, 
requires some copper....as in a couple K ft.  The algorithm doesn't 
factor in such short pieces of wire.  I tried it once and sure 
enough, the unit would not null correctly.  The locally generated 
house line sounded terrible while the CO based studio lines sounded 
fine on the air.  The in-house line worked fine with a standard phone.

I would tread this bridge very carefully as you don't want to 100% 
commit to something which may or may not work 
satisfactorily.  Especially with some devices which may generate the 
ring voltage and battery, but sure won't look like a CO otherwise on 
the other end.

Been there, done that

MM

At 02:37 AM 5/5/2008 -0400, Dana  Puopolo wrote
>VOIP can work better then POTS with a hybrid, because there's no loop
>involved-just a short piece of phone cable connecting the ATA (analog
>telephone adapter) and the hybrid. The hybrid doesn't have to null out all
>that reactance.  With some ATAs you can also crank up the caller audio volume,
>making the hybrid's job easier.