Nortel SONET AccessNode Manual page 77

Procedure 3-2 (continued)
Performing optical interface receiver sensitivity tests
Step
Testing using a SONET test set
11
Setting up STS-1 connections
12
Action
If you are testing with a SONET test set, connect the test set to the OC-3
tributary circuit pack as follows:
a. Connect an optical test cord with mVOA to the output of the SONET test
set and connect the other end to the optical power meter.
b. Adjust the mVOA to obtain an output level of − transmit (Out)20 dBm.
c. Disconnect the test cord from the optical power meter and connect it to
the receive connector of the OC-3 tributary circuit pack.
d. Connect a second optical test cord from the transmit (Out) connector of
the OC-3 circuit pack to the input of the SONET test set.
e. Settings on the SONET test set should be as indicated in Procedure 3-1.
Set up STS-1 connections by entering:
↵
csci
↵
slat <p or s>
where
<p> is used if primary optics are being tested.
<s> is used if secondary optics are being tested.
Note 1: Use QTRIB to make sure the tributary being used for testing is
connected to the optic under test. Refer to page 3-2 for information about
CSCI commands.
Note 2: To maintain the STS-1 connections, you must remain in the same
network element user interface screen in which you typed the CI commands.
If you move from one screen to another, the connections are dropped. If you
stay in the same screen you can issue commands from the menu without
affecting traffic.
Note 3: If SLAT is invoked from the NEUI main screen, the connections are
saved as you use the NEUI screens.
Note 4: Make sure traffic is on the optic that you are testing. The green
(active) LED should be lit. On an NWK ring ADM, remove and reinsert the ring
loopback circuit pack if the green LED is not lit. The right circuit pack should
now be active (the optic circuit packs in slot 5 and the ring loopback circuit
pack in slot 7 are paired, and the optic circuit packs in slot 9 and the ring
loopback circuit pack in slot 10 are paired).
—continued—
AccessNode Site Testing Procedures 323-3001-221 Issue 2.0
Tributary and optical tests for VTBM rings 3-15