Chapter 2
Hardware Components
Services Gateway Chassis
Services Gateway Chassis on page 5
Midplane on page 7
I/O Cards on page 8
Flex I/O Cards and Port Modules on page 11
Services Processing Cards on page 14
Host Subsystem on page 17
Switch Control Board on page 17
Routing Engine on page 19
Cable Management System on page 22
Craft Interface on page 23
Power Supplies on page 27
Cooling System on page 32
The services gateway chassis is a rigid sheet metal structure that houses all the other
components (see Figure 1 on page 6, Figure 2 on page 6, and Figure 3 on page
7). The chassis measures 14.0 in. (35.6 cm) high, 17.45 in. (44.3 cm) wide, and
24.5 in. (62.2 cm) deep (from the frontto the rear of the chassis). The chassis installs
in standard 800-mm (or larger) enclosed cabinets, 19-in. equipment racks, or telco
open-frame racks. Up to five services gateways can be installed in one standard
(48-U) rack if the rack can handle their combined weight, which can be greater than
818 lb (371.0 kg); see Table 28 on page 181.
Services Gateway Chassis
5