Before installing media modules in Branch Gateway chassis and EM200 expansion modules, it is considered that each media module type can be housed in a certain slot.

G430 Branch Gateway chassis has three media module slots, marked V1, V2, and V3. Each of the two optional EM200 expansion modules has two media module slots each. The slots of the EM200 expansion module connected to the EXPANSION OUT 1 connector on the rear of G430 Branch Gateway are slots V5 and V6. The slots of the EM200 expansion module connected to the EXPANSION OUT 2 connector on the rear of G430 Branch Gateway are slots V7 and V8.