The SR-a Series includes the SR-a4 and the SR-a8. They are a compact version of the e Series products designed to offer a slightly scaled-down version of the same services the e-Series offers.

Known as the ‘compact platform’ the key difference between the a4 and a8 is the system throughput. The SR-a8 can manage up to 400Gb/s whereas the SR-a4 is limited to 200Gb/s.

The SR-a Series includes the SR-a4 and the SR-a8. They are a compact version of the e Series products designed to offer a slightly scaled-down version of the same services the e-Series offers. Known as the ‘compact platform’ the key difference between the a4 and a8 is the system throughput. The SR-a8 can manage up to 400Gb/s whereas the SR-a4 is limited to 200Gb/s.

Quick product comparison:

	SR-a4	SR-a8
System throughput	Up to 400 Gb/s	Up to 200 Gb/s
Number of MDA-a’s and MDA-a XP’s per chassis (max)*	8	4
Number of IOM-a’s per chassis (max)**	2	1
Common equipment redundancy	CPM-a, PSU, fan	CPM-a, PSU, fan
Hot-swappable equipment	IOM-a, MDA-a, MDA-a XP, CPM-a, PSU, fan, fan filter	IOM-a, MDA-a, MDA-a XP, CPM-a, PSU, fan, fan filter
Dimensions	31.12 (H) x 44.5 (W)	22.2 (H) x 44.45 (W)
Weight	38.1kg	26.3kg
Power	AC and DC power 3 PSUs per chassis 2+1 redundancy	AC and DC power 2 PSUs per chassis 1+1 redundancy
Cooling	N+1 internal redundant fans Right-to-left airflow Variable speed for power efficiency	N+1 internal redundant fans Right-to-left airflow Variable speed for power efficiency

*MDA-a/ MDA-a XP = Media Dependent Adapter **IOM-a = Input/Output Module

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