The M20 router supports the Type 1 FPCs listed in Table 2. Inserting a combination of PICs with an aggregate higher than the maximum throughput per FPC is supported, but constitutes oversubscription of the FPC.
Table 2: FPCs Supported by the M20 Router
FPC Name FPC Model Number Maximum Number of PICs Supported per FPC Maximum Throughput per FPC First JUNOS Release Enhanced Plus FPC1 M20-FPC1-EP 4 3.2 Gbps 7.2