Slot Numbering

Slot numbering for the routers is similar.

In the E320 router, modules mount vertically in a 15–slot chassis, numbered left to right (0–16). See Figure 16 and Table 4 for slot locations. Because two half-height IOAs can be installed in a slot, the upper bay is designated Adapter 0 and the lower bay is designated Adapter 1. The router does not have slot groups.
Figure 16: E320 Slot Numbering
In the E120 router, modules mount horizontally in a 9–slot chassis, numbered bottom to top (0–10). See Figure 17 and Table 4 for slot locations. Because two half-height IOAs can be installed in a slot, the right bay is designated Adapter 0 and the left bay is designated Adapter 1. The router does not have slot groups.
Figure 17: E120 Slot Numbering

Table 4: Module Slot Locations

Component	Chassis Location	Slot
LM (line module)	Front	E320 router—0–5, 11–16 E120 router—0–5
SRP module	Front	6, 7
Blank filler panel	Front	Non-numbered empty slot between 6 and 7
SFM module	Front	8, 9, 10
IOA	Rear	E320 router—0–5, 11–16 Upper bay: Adapter 0 Lower bay: Adapter 1 E120 router—0–5 Right bay: Adapter 0 Left bay: Adapter 1