Cisco ONS 15454 - CHAPTER 1 General Troubleshooting; 1.1 Troubleshooting Circuit Paths with Loopbacks

2-5
Cisco ONS SONET TL1 Command Guide, R6.0
Chapter 2 Procedures and Provisioning
2.2 Test Access
– Bits per second = 9600
– Parity = None
– Stop BITS = 1
– Flow control = None
• If you are using a UNIX workstation, connect from X-windows or the terminal using the tip
command:
tip -9600 /dev/ttyb (or ttya depending on where serial cable is connected)
Step 4 Press Enter. A > prompt appears.
Step 5 At the > prompt, type the Activate User command to open a TL1 session:
ACT-USER:[<TID>]:<UID>:<CTAG>::<PID>;
Note When the semicolon is typed, the TL1 command is executed immediately.
Step 6 Type the Cancel User command to close a TL1 session:
CANC-USER:[<TID>]:<USERID>:<CTAG>;
2.2 Test Access
Note Test access applies to the ONS 15454, ONS 15327 and ONS 15600. Test access does not apply to the
ONS 15310-CL.
Note Refer to the Cisco ONS SONET TL1 Command Guide for complete command and autonomous message
information.
The test access (TACC) feature allows a third-party Broadband Remote Test Unit (BRTU) to create
non-intrusive test access points (TAPs) to monitor the circuits on the ONS 15454, ONS 15327 and
ONS 15600 for errors. The test access feature also allows the circuit to be split (intrusive), so that the
transmission paths can be tested for bit errors via the use of various bit test patterns. The two BRTUs
supported by the ONS 15454, ONS 15327 and ONS 15600 are the Hekimian/Spirent BRTU-93 (6750)
and the TTC/Acterna Centest 650.
The test access functionality provides TL1 commands for creating and deleting TAPs, connecting or
disconnecting TAPs to circuit cross-connects and changing the mode of test access on the ONS 15454,
ONS 15327 and ONS 15600. You can view test access information in CTC; in node view click the
Maintenance > Test Access tabs.
Refer to Telcordia document GR-834-CORE, Network Maintenance: Access and Testing and
GR-1402-CORE, Network Maintenance: Access Testing - DS3 HCDS TSC/RTU and DTAU Functional
Requirements for more information about Test Access.
A TAP provides the capability of connecting the circuit under test to a BRTU. This connection initially
provides in-service monitoring capability to permit the tester to determine that the circuit under test is
idle. The monitor connection should not disturb the circuit under test. The access point and remote test