Page 58 of 906 Overview553-3001-211 Standard 3.00 August 2005Nortel has tested line protection devices from three manufacturers. SeeTable 6. Each manufacturer offers devices for protection of digital as well asanalog telephone lines.These devices are compatible with 66 type M1-50 split blocks or equivalent.Consult the device manufacturer if more specific compatibility information isrequired.Line protection groundingIn conjunction with line protectors, proper system (PBX) grounding isessential to minimize equipment damage. Nortel recommends following theTable 6Line protection device ordering informationDevice order codeAnalogLineDigitalLine ManufacturerUP2S-235 UP2S-75 ITW Linx Communication201 Scott StreetElk Grove Village, IL 60007(708) 952-8844 or (800) 336-54696AP 6DP Oneac Corporation27944 North Bradley RoadLibertyville, IL 60048-9700(800) 553-7166 or (800) 327-8801 x555ESP-200 ESP-050 EDCO Inc. of Florida1805 N.E. 19th AvenueP.O. Box 1778Ocala, FL 34478(904) 732-3029 or (800) 648-4076