Cisco AS5850 Panduan Pemasangan Perangkat Keras - Halaman 19
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Halaman Cetak
Chapter 1
Cisco AS5850 Product Overview
Table 1-6
Function
ACO YES/NO
ALARM:
HIST CLEAR
RSC STOP/START
Figure 1-7
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
Warning
telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits and WAN ports contain
TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting
cables. To see translations of the warnings that appear in this publication, refer to the Regulatory
Compliance and Safety Information document that accompanied this device.
Connect the alarm port only to a safety extra-low voltage (SELV) source using 22 AWG, or thicker, copper
Note
wire. SELV ratings are maximum 30 Volts AC (RMS), maximum 60 Volts DC, and maximum
50 VA power. The alarm port is rated for 2.0 Amp maximum current.
Table 1-7
Port
CONSOLE
AUX
10/100BT
NETWORK CLOCK
ALARM
Common Logic Interface
Each RSC card contains a block of logic referred to as the common logic and system clocks. This block
generates the backplane Stratum compliant 4-MHz and 8-kHz clocks used for interface timing and for
the TDM bus data movement. The common logic can use a variety of sources to generate this system
timing, including a T1 or E1 signal input from the BNC connector on the RSC front panel.
78-10573-06 0A
RSC Push Button Options
Definition
ALARM CUTOFF—When selected (YES), software should turn off any active
external alarm relay control bits. If any subsequent (new) alarm condition
occurs, ACO status should revert to NO.
When selected, turns off the HIST LED (if it is on), but only if there is no
current Major or Minor alarm condition.
Select this before removing the RSC card.
shows the RSC front panel ports, and
RSC Front Panel Ports
Description
Provides primary RJ-45 connection to system
management.
Provides secondary RJ-45 connection to system
management.
Provides Fast Ethernet connection to backbone
network.
Provides BNC connection for a BITS clock.
Provides a three-point terminal block
connection to an external audible or visual alarm
source.
Table 1-7
describes the port functions.
Cisco AS5850 Universal Gateway Hardware Installation Guide
Field-Replaceable Units
1-19