Produced entirely correct and outstanding seller

Hello,
If you're like me to have to mount a box ([emergency line] in a communication cabinet
with RJ45 input and output line to the wall you necessarily need that kind of accessory.
The spark line (ADSL filter | Phone) allows not to have noise (interference) on the fax line.

Thank you Welcome to IT which is a real seller Professional and not an imitation as many others.

Cdlt,

JMG