Nortel SONET AccessNode Manual page 67

Procedure 3-1 (continued)
Verifying OC-3 tributary SONET test set performance
Step
4
5
Verify test set performance
6
7
8
9
Action
Set the receive settings to match the transmit settings. Also set the Results
parameter as follows:
Results: Error counts
DANGER
Risk of personal injury
Avoid direct exposure to laser beams or fiber. Follow the
precautions listed in Chapter 1 when handling optical
fibers.
Connect the optical patch cord between input and output.
Press Restart on the test set.
The test set displays zero errors and alarms.
Press the Single Bit Error Inject button three times.
Verify that the STS path CVs is equal to 3.
CAUTION
Risk of damage to the optical receiver
For the NT7E02 OC-12 long-reach (LR) interface unit,
received optical power must not exceed the following safe
level: − 6.0 dBm. Refer to Site Installation Planning and
Engineering , 323-3001-200, in the Engineering,
Configuration, and Ordering Guide , Volume 1.
There are no damage levels for NT7E01 IR and LR, NT7E02
IR, and NT7E05 IR and LR optical interfaces.
If you did not obtain the required results, check the settings and repeat the
test. If necessary, clean the optical connectors, make sure the connectors are
correctly attached and repeat the test. If necessary, replace the test set, the
optical patch cords, or both and repeat the test.
Disconnect the optical patch cord.
—continued—
AccessNode Site Testing Procedures 323-3001-221 Issue 2.0
Tributary and optical tests for VTBM rings 3-5