In my experience (which is quite a bit) the intent of the standard allows for the replacement of components upon completion of each discrete test.
Example: upon completing the 25 positive and 25 negative 10x1000, 1000V, 100A surges between tip and ring with ring grounded, you could choose to use a new sample or replace any component you so desire before moving on to the next test configuration. Of course when performing 2nd level tests it is OK to change components. There is one component that I feel should never be changed during 2nd level testing unless it fails open or the card is damaged to the extent it will require repair. That component is a PTC in line with Tip, Ring, Tip1, or Ring1. If you do not change them out after each test you will almost surely have a fire that looks like a roadside flare on your circuit board. In other words, in my opinion, they should never be used in network interfaces unless they can be improved vastly beyond the current technology. Hopefully Bellcore will address these PTC's in future revisions of GR-1089-CORE. Jim Wiese ADTRAN, INC. ---------- From: treg-approval To: 'TREG' Subject: Bellcore 1089 List-Post: [email protected] Date: Wednesday, June 04, 1997 3:40PM Hello Treggers, I have been told by one of our parts vendors that it is acceptable to = replace components between the different surge waveforms when doing = testing to sec.4 table 4-2 for first level lightning surges. Their = rationale is that the components are being stressed by the previous = tests. I am not convinced. I thought that each test sample should = withstand all of the surges. I don't want to take the vendor's word = alone because it is their parts that are failing. Any similar experiences or comments would be appreciated. Rich Kalian [email protected]
