User manual

Alarm Reporting
DS3 Far-End Alarms and Control (FEAC)
12-4 July 2004 Wide Bank 28 DS3 - Release 2.4
DS3 Far-End Alarms and Control (FEAC)
Far-end alarms are events that occur at a remote location and are reported to the Wide Bank 28 DS3
over the DS3 link. This feature and the associated commands require the DS3 to be set for C-bit framing.
Far-End Alarm Transmission
When there is a far-end alarm condition, code words are transmitted continuously for the duration
of the alarm, or for a minimum of 10 code words, whichever is longer. Only the highest priority
alarm is transmitted. If a high priority alarm occurs while a low priority alarm is active, only the
higher priority alarm will be sent. When no alarm is being transmitted, the far-end alarm signal
contains all ones. Absence of a far-end alarm signal implies no far-end alarm exists.
Far-End Alarm Reporting
The 11 far-end alarms are treated as MINOR alarms but are reported as events in TL1 (see Alarm
and Event Message Parameters on page 9-107). Thus, when an alarm occurs the non-critical alarm
LED goes to YELLOW, the non-critical alarm contact is activated, an automatic TL1 message is
generated, and the alarm is entered in the Event Log. The current far-end alarm will also be
displayed by the alarms and status ds3far commands for DS3 far-end alarms.
TL1 Alarm Reporting
Transaction Language One (TL1) automatic outbound alarm messaging is a standards-based ASCII
management language defined for TL1-based operations and support systems such as the Telcordia
NMA™ network monitoring and fault management system.With this feature, the Wide Bank will
integrate into TL1 alarm-managed networks to provide notification of network and equipment
conditions. See TL1 Automatic Messages on page 9-101.
TL1 Automatic Messages
TL1 automatic messages are used to automatically report alarms and other events detected by the Wide
Bank 28 DS3. The Wide Bank supports the reporting of alarmed and non-alarmed events using the
message formats defined by Telcordia GR-833-CORE, 1996. OSS’s such as Telcordia’s NMA system
are able to use these messages to provide trouble reports to the network operations center. For a detailed
description of the Wide Bank messages, see TL1 Automatic Messages on page 9-101.
You can establish a TL1 session through a TCP connection through TCP port, the Asynchronous RS-
232 TL1 port, or a terminal-to-terminal session when running in C-bit framing mode. See Connecting
and Configuring for TL1 on page 9-9.