QUOTE(cyanide @ Jul 26 2010, 02:00 PM)
One question here,
Why we need those ADSL or RJ45 for protection.
Aint that if the phoneline (RJ11) protected, those after the phoneline all protected?
Thanks!
RJ11 is just a registered jack type as market standard...
there may have different data type go passing thru RJ11 jack...
example: telephone / fax = analog; broadband = digital
usually RJ11 only used Pin 2 & 3 for voice... but as your information KeyPhone system used Pin 2 & 3 for voice call, but Pin 1 & Pin 4 for data (display the extension status, direct line usage, etc), for this kind of KeyPhone system u may use other model for 99.9% compatibility and 99.9% protection...
It is not about "wire to wire" direct connection... As broadband is a "sensitive" application, any interruption in between will cause the disconnection, that the reasons need to design a specialized model to suit with broadband and able to support higher speed (4mb+ speed)...
assumed RJ11 can cater up to 4mb, then dial up modem (56kbps) should able to support 4mb too since is the same RJ11... why dial up modem cant support the speed & reinvent the wheel? bcos dial up modem only support analog interface, and the telecommunication provider reuse the market standard (RJ11) for broadband (digital interface) as concerned cost efficiency, reduce the lowest cost and bring the best functionality...
FYI, as heard may have "broadband over power cable" in the future, and replace RJ11 due to costly copper wire, so Cal-Lab may come out another model to support such technology too... FYI, Aztech have such product "local network over power cable" and Cal-Lab built another new model for 3 pin power socket interface to support it without interrupting the power and networking speed...
This post has been edited by gkl83: Jul 26 2010, 02:58 PM