I'm back after a 5 years usage of Cal-Lab.

Before that I fried 2xmodem, 1xfax.

Ever since I bought the Cal-lab telephone line with 2 ports (not sure which code, i only use 1 port each time, swap to the other port whenever it burnts).

RMA 2x. Hassle free exchange on the spot , no questions ask.


Technically speaking it protected my modem 4x every since I purchased from GKL83.



Highly recommended!