Modular Slots: 2 SIC (Smart Interface Card) slots and 1 MIM (Multi-channel Interface Module) slot.
Fixed Interfaces: 1 x 10/100Mbps Ethernet interface, 1 x Synchronous/Asynchronous Serial Interface, 1 x AUX port, 1 x Console port.
Memory: 128MB Default SDRAM (up to 256MB supported, based on similar AR28-31 models).
Flash: 32MB.
Power Supply: AC: 100V-240V, 50/60Hz (Max power 50W).
Dimensions & Weight: 376.2 x 79.4 x 287.9 mm (including rubber feet), 2.5 kg.
Operating Temperature: 0 to 40°C