363-206-305
Technical Specifications
10-12
Issue 3 June 2000
— PM features listed above
— Local and remote loopbacks
— Programmable loopback time-out
— Alarm status.
■
Described in
PairGain
Specifications, OEM-HMO-SW1-02
Optical Interfaces
10
The DDM-2000 FiberReach Multiplexer supports either an OC-1 or OC-3 high-
speed interface that is synchronous optical network (SONET) compliant. When
equipped with the 26G2-U OLIU, the companion OLIU at the host node is the
27G-U OLIU. The nominal OC-1 rate is 51.84 Mb/s for these OLIUs. When
equipped with the 28-type OLIU, the OLIU on the neighboring DDM-2000 OC-3
shelf may be any 22-type OLIU, or 21-type on an OC-12 shelf.
Lightguide Jumpers
10
The DDM-2000 FiberReach Multiplexer provides Lucent's universal optical
connector on the OLIU. The universal optical connectors are receptacles on the
faceplate of the OLIU that allow a single OLIU to support either ST, FC-P
, or
SC
connectors as needed. Both 0 dB and attenuating buildouts are supported.
The DDM-2000 OC-1/OC-3 lightguide interface uses single-mode and multimode
jumpers for connecting to and from the outside plant
LGX
panel and the DDM-
2000 OC-3.
When the outside plant lightguide is single-mode, a single-mode jumper must be
used for the transmit side and either single-mode or multimode jumpers can be
used for the receive side of all OLIUs (except the 29-type which requires single-
mode fiber on both the transmit and receive sides due to potential optical path
degradations).
The 29-type OLIU must be used with single mode fiber.
Lightguide jumpers can be ordered from Lucent. See the appropriate
"Miscellaneous Equipment and Tools" section for ordering information in the
363-206-300,
DDM-2000 FiberReach Multiplexer Applications, Planning, and
Ordering Guide
.
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