Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 2093 / 2536

DLP-505
: Detailed Level Procedure 363-206-285
Page 7 of 8 Issue 2, February 2000
DDM-2000 OC-3 M
ULTIPLEXER
8. Use lightguide jumpers to loop the IN and OUT connectors of the MAIN 1 or
FUNCTION UNITS-( )-1 OLIU(s) (Tables D and E).
Response: FAULT LED stops flashing.
ACTIVE LED remains on.
(If flashing, FAULT LED on OHCTL goes off after all
number one OLIUs are looped.)
If responses are not correct, check connections and
looping fibers. Clean connectors and repeat Step 8. If
responses are still not correct, replace OLIU.
Comment: In ring releases, the lighted major (MJ) or minor (MN) LED
remains lighted.
It may take 1 minute or more for LEDs and alarms to sta-
bilize after the OLIU(s) are looped.
9. For the 22D-U , 22G-U, 24G-U/24H-U, 26G2-U, 27G-U/27G2-U, or
29G-U/29H-U OLIUs, replace the 0 dB LBO on the OUT buildout block(s) with
the required 10 dB LBO on the MAIN 2 or FUNCTION
UNITS-( )-2(P) OLIUs (Table C).
10. Use lightguide jumpers to loop the IN and OUT connectors of the MAIN 2 or
FUNCTION UNITS-( )-2(P) OLIU(s) (Tables D and E).
Response: FAULT LED stops flashing.
In ring releases, ACTIVE LED remains on.
Minor (MN) [major/minor (MJ/MN), if rings] alarm goes off.
If responses are not correct, check connections and
looping fibers. Clean connectors and repeat Step 10. If
responses are still not correct, replace OLIU.
It may take 1 minute or more for LEDs and alarms to
stabilize after the OLIU(s) are looped.
11. STOP. YOU HAVE COMPLETED THIS PROCEDURE.