In a message dated 7/8/99 Daren Allen writes: << I am interested in any information the can be provided concerning NEBS testing on a DSLam line card (which would be installed in a CO type system). >>
Daren: The NEBS requirements (Network Equipment Building Standards) address the full range of requirements for C.O. equipment, including electrical, mechanical, and environmental. It would be a good idea to see if you can narrow the scope to determine which NEBS requirements apply to your particular situation. The NEBS requirements were written by Bellcore for inclusion in the specifications for equipment purchased by Regional Bell Operating Companies (RBOCs). The RBOCs are under no obligation to use any of the NEBS requirements, but they typically include the entire set in their specifications. Sometimes you can negotiate with them to modify the list of NEBS specifications they call out. If your customer is not an RBOC, you have even more flexibility to negotiate regarding which NEBS requirements apply. However, if an independent vendor's DSLAM will be installed in an RBOC central office under the equal access provisions, you may find that the host RBOC will still insist on compliance with certain NEBS safety requirements. One NEBS requirement that you are likely to encounter for a DSLAM application will be GR-1089-CORE. This document contains requirements for immunity to emc, lightning and power cross events. Due to Bellcore's emphasis on reliability and safety of network equipment, these requirements are quite stringent. If you have not worked with these requirements before, you may be surprised to see how difficult they are to meet. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 (voice) 781-721-0582 (fax)
