1. The pre-processing card and the rear adapter card of the same network interface module must be installed on the corresponding card slots of the same universal interface unit pre-processing card and rear adapter card. If the system startup does not satisfy the corresponding relationship (the front and rear boards do not match), the LOG alarm information will be output. The
2. The rear panel of VIU (VIU4) can be 3FEMK and VIEU. If 3FEMK is used, three FE interfaces (x/2/0, x/2/1, x/2/2; x is the slot number) can be used, but only PMC1 can be used. If VIEU is used, only one FE interface (x/2/0) can be used, and both PMC0 and PMC1 can be used.