Surge Suppressors from TelephoneStuff.com

Allen Tel Surge Protector -- ATSP25MF

 
 
Allen Tel Surge Protector -- ATSP25MF -- View Larger Image
Allen Tel Surge Protector -- ATSP25MF-Image

Protects RS232 ports against voltage surges caused by lightning, electrical interference and static bursts. Unit incorporates a metal oxide varister (MOV) to protect pins 2, 3 and 7. Plugs into the data circuit between the RS232 port and the data circuit or modem.