Adam, I will look into the reed relays. For reference, the Ethernet voltages are standard GR1089 spec 1.5kV 1.2/50 OC waveform, 2 Ohm series resistance, common mode. Thanks, Ken ----- Original Message ----- From: "M. Adam Davis" To: "Microcontroller discussion list - Public." Sent: Thursday, September 17, 2009 9:40 AM Subject: Re: [EE] Need surge injection port for testing telco, ethernet and coax interfaces What are the surge levels? You can get high voltage relays from common electronics suppliers, such as Digikey - they have up to 10kV reed relays, such as DAT70510 or H24-1A69. You'll have to go to power company suppliers if you want to switch higher voltages. Alternately, it's not hard to make a high voltage, low current contactor yourself with a servo or solenoid. Remove the tab from the RJ45 connector, and let the solenoid or servo attach and detach the cable. A little bit of mechanical work is good for the engineering mind anyway. -Adam -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist