The towerMAX® CO/4 features superior line protection for CO lines. Protects 4 lines, RJ-11/45 jacks. Two lines protected per connection (pins 3,4,5,6 on each jack). Two 7ft phone cords included. Includes Panamax's auto-resetting technology. Unlike other surge protectors, the PTC resistors open when surge occurs and close themselves again after the surge is over.
Avaya Merlin Magix Installation R2.2 and Earlier.pdf