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

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363-206-285
Circuit Pack Descriptions
Issue 3 June 2001 7-99
Maintenance Signal Functions 7
The BBG20 TMUX detects the following DS3 signal failures from the DSX-3:
■
LOS
■
OOF
■
AIS
■
BER.
The BBG20 TMUX inserts DS1 AIS on all DS1 outputs (toward fiber) upon
detection of DS3 LOS, OOF, and AIS, and DS2 OOF.
Transmission - Optical Interface 7
Universal Optical Connector 7
Circuit packs having a "-U" after their designation indicate that these circuit packs
have a universal optical connector.
The following circuit packs are available with the connector:
■
22D-U OLIU
■
22G-U/22G2-U/22G3-U
/22G4-U*
OLIU
■
24G-U
/24H-U
OLIU
■
22F-U/22F2-U
■
26G2-U OLIU
■
27G-U/27G2-U OLIU
■
29G-U/29H-U*
*Ship with SC buildout and ST shiped loose with each pack.
This connector, 29G-U/29H-U (Figure 7-38), is a two-part connector consisting of
a faceplate-mounted block and an optical buildout. The faceplate block optionally
supports an
ST
®
, SC, or FC-type optical buildout.
A 0 dB SC -type connector is shipped as standard with each OLIU. Optional ST 0
dB buildouts are shipped loose with each OLIU. Optional SC, ST, or FC-PC 0 dB
or attenuated buildouts can be ordered separately. See Chapter 10, "Technical
Specifications," for a list of universal buildout attenuators. All OLIU’s will phase to
SC buildout mountd and ST shipped loose.