Gigabit network protection scheme

一、 Application environment
1. The thunderstorm weather frequently
2. Vulnerable to electromagnetic interference environment
3. The network communications equipment after the lightning strike damage is serious
4. The high grade of surge protection
 
二、 The scheme in this paper
2. After the transformer with low capacitance, fast reaction of TVS do differential mode.
3. Meet IEC61000-4-5 surge test standard, etc.
4. By ITU. K. 21 10/700 mu mu s 40 s - 5/320 Ω DM: 2 kv CM: 6 kv surge test.