Chapter 1 Introduction
TC8518 Product Description
TC8518 Rev 2.2 User Manual
1-17
1.3.8
Default Unit Alarm Settings
When the TC8518 reports an alarm condition, such as loss of synchronization, the
alarm will cause the ALM LED on the front panel to flash RED . Each alarm can be
individually enabled or disabled. The alarm types are listed in the table below.
Alarm Type
Alarm
Option
Default
System
Loss of Power
Unit Temp >90C
Alarm Cut Off
Dry Contact Relay
Loopback
Disable, Enable
Disable, Enable
Disable, Enable
Disable, Enable
Disable, Enable
Disable
Disable
Disable
Disable
Enable
Optical
LOS
RXBER
RDI
OPT-A LOS
OPT-B LOS
Disable, Enable
Disable, Enable
Disable, Enable
Disable, Enable
Disable, Enable
Enable
Disable
Disable
Disable
Disable
T1/E1
AIS
LOS
BPV
TOCD
TCLE
Disable, Enable
Disable, Enable
Disable, Enable
Disable, Enable
Disable, Enable
Enable
Enable
Enable
Disable
Disable
1.3.9
Optical Redundancy
Figure 3 below, illustrates the function of optical redundancy. Optical redundancy is
used to prevent the loss of data transmission in the event that an optic cable or
transceiver is malfunctioning. Should this occur, the secondary optic link & receiver
"B" is enabled automatically, thereby preserving the integrity of the communication.
In the meantime, the "Alarm" LED will flash and the buzzer will sound to indicate
an optic alarm (depending on Optic alarm settings).
With optical redundancy, the optic transmitter "TxA" and "TxB" both transmit the
same signal to the remote unit. It is up to the remote unit to decide whether "RxA"
or "RxB" should be used as the valid incoming optical signal. By default, "RxA" is
the primary receiver; "RxB" is the standby backup.
Содержание TC8518 T1
Страница 1: ...TC8518 T1 E1 Voice Data 10 100 Base T Ethernet Fiber Optic Multiplexer User Manual MNL 85180 01 22...
Страница 4: ...4 TC8518 Rev 2 2 User Manual...
Страница 8: ...TABLE OF CONTENTS TOC 4 TC8518 Rev 2 2 User Manual...
Страница 13: ...Chapter 1 Introduction TC8518 Product Description TC8518 Rev 2 2 User Manual 1 5 TC8518 Front Panel...
Страница 28: ...Chapter 1 Introduction TC8518 Product Description 1 20 TC8518 Rev 2 2 User Manual 1 3 11 Physical Dimensions...
Страница 88: ...Chapter 6 Troubleshooting Loopback Tests 6 6 TC8518 Rev 2 2 User Manual Figure 6 8 Local Loopback Tests...
Страница 106: ...Glossary 8 TC8518 Rev 2 2 User Manual...
Страница 108: ...Index Index 2 TC8518 Rev 2 2 User Manual...