Technical information
Table Of Contents
- 1 What is TL1?
- 2 TL1 Message Types and Examples
- 3 Connect to TL1
- 4 Log Into TL1
- 5 Command Actions and Categories
- 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

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Input Example:
OPR-LPBK-DS1:PTREYES:DS1-4-1-2-13:203::NEND,,,FACILITY;
RLS-LPBK-T1
Use the RLS-LPBK-T1 command to release a loopback. The RLS-LPBK-T1 command is listed as
RLS-LPBK-<MOD2> in the Cisco ONS SONET TL1 Command Guide. T1 is just one of the options
you can enter. RLS-LPBK-T1 is from the Troubleshooting and Test Access category.
Input Format:
RLS-LPBK-<MOD2>:[<TID>]:<SRC>:<CTAG>::[<LOCATION>],,,[<LPBKTYPE>];
• TID is the name of the node you want to access. If you only want to query the node you connected
to leave the TID blank.
• SRC is an access identifier. Valid values are facility, DS1, and STS.
• CTAG is any non-blank character series that does not have to be unique.
• LOCATION is the location where the operation is to be carried out.
• LPBKTYPE is a loopback type and is optional. LPBKTYPE can be FACILITY or TERMINAL.
Input Example:
RLS-LPBK-DS1:PTREYES:DS1-4-1-2-13:203::NEND,,,FACILITY;
7 Log Out of TL1
When you are finished using TL1, you must log out of the session. Logging out of TL1 only has to be
done once per session.
Step 1 If you logged into TL1 via CTC, you must log out by pressing the Disconnect button or by
issuing the CANC-USER command as shown in the following steps.
If you logged into TL1 via Telnet or craft interface, you must log out by issuing the
CANC-USER command.
Input Format:
CANC-USER:[<TID>]:<USERID>:<CTAG>;
• TID is the name of the node you want to access. If you only want to query the node you
connected to leave the TID blank.
• USERID is your user ID. Maximum of 10 alphanumeric characters.
• CTAG is any non-blank character series that does not have to be unique.