The SSN1EFF8 board can be inserted in slots 19, 21, 23, 25, 29, 31, 33, and 35 of the subrack as the interface board of the EFT8/EFS0/EMR0 single boards; it can be inserted in slots 19 to 26 and 29 to 36 of the subrack as the interface board of the SSN1EMS4/SSN1EMS2/SSN1EFS0A single boards.

The slots of SSN2EFT8/SSN5EFS0/SSN2EMR0 single boards and the corresponding slots of EFF8 single boards are shown in Table 1.

The slots of the EMS4/EMS2/EFS0A boards and the corresponding slots of the EFF8 board are shown in Table 2.