NEC Univerge SV9100 - Figure 4-25 GCD-4 DIOPA Blade

Issue 3.0
4-72 Installing the SV9100 Blades
5.5 GCD-4DIOPA (DID/OPX Interface)
5.5.1 Description
The GCD-4DIOPA supports the analog DID and single line telephone
interface functions (such as Off-Premise Extension). The function type is
assigned in programming for each port. The circuit types, however, should
be grouped together. For example, with three DID circuits and one OPX
circuit, they should be grouped as DID, DID, DID and OPX and not DID,
DID, OPX and DID.
Figure 4-25 GCD-4DIOPA Blade