Dear friend!
Are you talking about the EMS2 board?
Port working modes supported by an EMS2 board on an OSN 3500:
1. GE electrical ports: auto-negotiation, 1000M full-duplex, 100M full-duplex, and 10M full-duplex
2. GE optical ports: auto-negotiation and 1000M full-duplex
3. FE electrical ports: auto-negotiation, 100M full-duplex, 100M half-duplex, 10M full-duplex, and 10M half-duplex (An EMS2 board supports FE electrical ports when it works with an ETF8 board.)
4. FE optical ports: 100M full-duplex (An EMS2 board supports FE optical ports when it works with an EFF8 board.)
For more information,please click the following link:
https://support.huawei.com/hedex/hdx.do?docid=EDOC1000177952&id=tc_osn_hd_1309&lang=en
Thanks!