Juniper ACX4000 Hardware Manual page 12

• Installation flexibility with an environmentally hardened design—Most ACX Series routers are
temperature hardened and support passive cooling for outdoor deployments in extreme weather
conditions.
Chassis Description
The ACX Series router is a single-board router with a built-in Routing Engine and one Packet Forwarding
Engine that has two Flexible PIC Concentrators (shown in the CLI as FPC 0 and FPC 1). Because there is no
switching fabric, the single Packet Forwarding Engine takes care of packet forwarding:
• Routing Engine—Provides Layer 3 routing services and network management.
• Packet Forwarding Engine—Performs Layer 2 and Layer 3 packet switching, route lookups, and
packet forwarding.
The ACX Series router is powered by Junos OS, supporting extensive L2 and L3 features, IP/MPLS with
traffic engineering, rich network management, fault management, service monitoring and Operation,
Administration, and Maintenance (OAM) capabilities, and an open software development kit (SDK)
system that allows providers to customize and integrate operations with their own management
systems. For a list of related Junos OS documentation, see
software/junos/.
As part of the mobile backhaul, the ACX Series router at the cell site and the MX Series router at the
aggregation layer provide comprehensive end-to-end Ethernet, MPLS, and OAM features with the one
Junos OS running on both platforms.
The ACX4000 routers are 2.5 rack units (U; that is, 4.375 in., or 11.11 cm) tall. Several routers can be
stacked in a single floor-to-ceiling rack for increased port density per unit of floor space.
The chassis is a rigid sheet metal structure that houses all the other router components (see
page 4, and Figure 2 on page
deep, and 17.5 in. (44.5 cm) wide. The outer edges of the mounting brackets extend the width to
19 in. (48 cm) (from the front-mounting brackets to the rear of the chassis). The chassis installs in
standard 300-mm deep (or larger) enclosed cabinets, 19-in. equipment racks, or telco open-frame racks.
The ACX4000 router contains eight combination Gigabit Ethernet ports, either RJ-45 or SFP ports. Two
of the Gigabit Ethernet RJ-45 ports support PoE. The ACX4000 router also supports installation of two
additional Gigabit Ethernet SFP transceivers and two 10-Gigabit Ethernet SFP+ transceivers. The router
4). The chassis measures 4.375 in. (11.11 cm) high, 9.5 in. (24.13 cm)
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Figure 1 on