详细资料：
Specs: Fireberd 6000 is the industry standard for transmission testing and frame relay analysis. The "MC" version is in a ruggedized metal case and is equivalent to a model 6000A. Performs BERT, timing, signal, and protocol. Test T1/FT1, T3, E1,G.703/704, DDS, RS232, V.35, RS449, X.21, and HSSI from any 50 bit/s to 52Mbit/s access point.
