Telephone wiring is the single most common application of lightning protection in the low voltage industry. While there are new technologies being created every day, there are some technologies that don't change. DITEK's "P" series is available in 1-8 pair models, and is most commonly found punched down on 66 blocks for incoming telco and building-to-building runs. Each pair of protection is represented by a red and a green lead. Simply terminate a set of leads for each pair of wiring on any punch block, and provide a ground to dissipate excess energy.