Chapter 2 Hardware Description
AC 60 System Hardware Specifications
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Access Concentrator 60 User Guide
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clock signal. The port is not intended to be directly connected to a
network interface as outside plant.
Central Processing Unit Component
The Central Processing Unit (CPU) component provides the processing,
switching, and storage functions for the AC 60 system. The RISC-based
microprocessor has the processing power to maintain data flow, perform
numerical calculations, and manage the DMA interfaces. While the interface-
specific physical and link layer protocol functions, in addition to the queuing
and traffic management functions, are performed on each of the various I/O
modules, the CPU module has 64 MB of memory for routing and signalling
functions, forward error correction, processing of SVC connections, and
network management capabilities.
AC 60 System Hardware Specifications
Table 2-1 describes the physical specifications for the hardware components
that make up the AC 60 system.
AC 60 System Environmental Specifications
Maintaining the proper temperature and humidity in the room where the
AC 60 system is located helps control many static charge problems.
Maintaining proper room climate is especially important when heat is turned
on during the winter months. To avoid damage to the AC 60 system, do not
allow the humidity to increase to the level where water droplets would
Table 2-1. AC 60 Chassis Hardware Specifications
Slot configuration:
Two I/O and server modules
Height:
8.9 cm (3.5 in)
Width:
44.04 cm (17.34 in)
Depth:
33 cm (13 in)
Weight:
5.9 kg (13.1 lb)
Material:
Aluminum
Color:
Black
Cooling method:
Three fans and one filter kit on right side
Power source requirements: Any power source input from
90 to 264 V ac power supply
Clock synchronization:
Built-in (factory-installed) Stratum 3–4
clocking