NEC ASPILA EX Feature Manual page 18

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Port Assignments: How the System Assigns Ports to the PCBs
4 Features
Port Calculation for Trunks:
With the 4COIU-LS1, 8 COIU-LS1, 4COIU-LG1, 8COIU-LG1, 8ESIU-PR2, 16ESIU-PR2,
4DIOPU-A1, 8DIOPU-A1, 2BRIU, 4BRIU, and 8BRIU PCBs, the system detects the type of
PCB (trunk or extension) and assigns the required extension or trunk ports to the slot. The sys-
tem will use the next available port number - it will not reserve any ports.
The PRI PCB assigns the first 32 consecutive trunk ports.
Port Calculation for Extensions:
With the 8/16ESIU or 8SLIU PCBs, the system detects the type of PCB (trunk or extension)
and assigns the required number of extension ports for the PCB to the slot. For example, the
8ESIU will have 8 station ports assigned - the 16ESIU will have 16 ports assigned.
Aspila EX Software Manual