OptiX OSN 7500 
Technical Manual - System Description  4 Boards 
 
Huawei Technologies Proprietary 
4-11 
Table 4-9 Data service interface boards and their available slots 
Board  Full name  Slots available  Interface type  Used with 
ETF8  8 x 10/100M Ethernet 
twisted pair interface board 
slot 19–slot 22, slot 35–slot 38  RJ-45  EFS0, EMR0 
EFF8  8 x 10/100M Ethernet 
twisted pair interface board 
slot 19–slot 22, slot 35–slot 38  LC  EFS0, EMR0 
ETS8  8 x 10/100M Ethernet 
interface switching board 
slot 21 and slot 35  RJ-45  EFS0