With these links, it is imperative you place the probe at the first physical point where the circuit enters your network.This ensures that you capture actual traffic on the link before it is terminated in the network DSU/CSU.

• 对于这些链路，你必须把探头放在电路进入网络的第一个物理点，这就确保了在网络DSU/CSU处结束前捕获链路上实际的流量。