In a message dated 2/28/2002, Alex McNeil writes:
> I am not too familiar with the North American requrements: > Our customer has requested Surge Protection testing to the Bellcore LATA > Switching General Requirements. 600 Vpk metallic, and 2500 Vpk > longitudinal. > > 1. Are you familiar with this spec? > 2. Are these requirements covered in any of the Regulatory Telecomms or > Safety specs or is our Customer wanting something beyond the regulatory > requirements? > 3. How can I get a copy of this standard? > Hi Alex: These requirements are described in Telcordia (formerly Bellcore) document GR-1089 CORE, "Electromagnetic Compatibility and Electrical Safety - Generic Criteria for Network Telecommunications Equipment." It can be purchased from the Telcordia web site at http://www.telcordia.com/. GR-1089 is not a regulatory requirement. It is simply an industry specification that can be called out on a customer specification. In the USA, compliance with GR-1089 is typically required by the major network operators for equipment that will be used in their central offices. Anyone else can also call out GR-1089 on a purchase specification if they choose to do so. In general, the lightning requirements in GR-1089 are more severe than those ITU K.20 or EN 300 386. Even more significant is the difference in power cross tests, which are much more severe in GR-1089 than the tests called out in K.20 or EN 300 386. While compliance with GR-1089 can be challenging and may add slightly to the cost of your interface circuits, it does provide a reasonable guarantee that the equipment will have very few field failures due to lightning and power induction. This makes it an attractive specification for customers to call out on a purchase specification. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 http://www.randolph-telecom.com
