Technical information

2
6 Ten Basic Commands
7 Log Out of TL1
8 Obtaining Documentation
9 Documentation Feedback
10 Cisco Product Security Overview
11 Obtaining Technical Assistance
12 Obtaining Additional Publications and Information
1 What is TL1?
Transaction Language 1 (TL1) is a set of ASCII (American Standard Code for Information
Interchange)-based instructions, or messages, that an operations support system (OSS) uses to manage
a network element (NE) and its resources. TL1 provides a standard set of messages that can be used
for communicating between operating systems and NEs, and personnel and NEs.
2 TL1 Message Types and Examples
There are two main types of standards-defined TL1 messages: command/responses and autonomous
messages.
1. Command/Responses—These are initiated by a user and provide two parts: a request to the NE
to set or get information, and a response from the NE containing completion or status codes and
requested information. Request, or input messages are used to issue the request portions of
command messages to the NE. Command messages are often referred to as command/response
messages, where the request portion is an input message (OSS to NE) and the response portion is
an output message (NE to OSS).
a. Set information—The simplest type of messages are those that set information or instruct the
NE to perform an action and return only a result with no data in the response:
Example: ENT-CRS-<STS_PATH> to create an STS cross-connection
b. Get information—Some TL1 commands get information or request information be returned
from the NE.
Example: RTRV-ALM-ALL to show the current status of all active alarm conditions
c. Response message—The response portion of a command message correlates to a particular
request message. If a command is successful, the NE sends a response message containing the
COMPLD code.
Example:
SV192-DATA-461 2003-08-05 10:35:17