363-206-305
System Introduction
Issue 3 June 2000
1-7
DDM-2000 FiberReach Releases
1
NOTE:
DDM-2000 FiberReach Release 3.0, 3.1, and 4.0 are
NOT
compatible with
previous releases of DDM-2000 FiberReach, OC-3, OC-12 and FT-2000
that do not support TARP, thus care should be taken to avoid isolating NEs
that have not yet been upgraded to Release 3.0 or later when upgrading a
subnetwork.
Release Descriptions
1
The following paragraphs provide a brief description of available DDM-2000
FiberReach Multiplexer releases.
Release 2.2
provides the following:
â–
New OC-3 OLIU (28G-U/28G2-U) for OC-1 Shelf. The new 28G-U/28G2-U
OLIU provides OC-3 optics directly from the DDM-2000 OC-1 Shelf. This
allows the FiberReach shelf to support an OC-3 ring, with the low-speed
input capacity of the 28 VT1.5 shelf. The 28G-U/28G2-U OLIU provides
visibility to the full STS-3 bandwidth and allows for selection of any 28
VT1.5s within the 3 STS-1s on the OC-3 ring for drop at the FiberReach
shelf. Remaining traffic can be passed-through on the OC-3 ring.
â–
New Secured-Area Telecommunications Applications Cabinet (STAC)
System — FRC 2000. This small, integrated modular indoor cabinet
offering enables the provisioning of electronic controls, terminals, and
instruments quickly at the point of need with minimal investment and real
estate. The enclosure optimizes equipment density, heat transfer,
environmental protection, and ease of installation and maintenance. It is
designed to maximize public and installation safety.
â–
The HDSL circuit pack (BBF8) provides for HDSL interface capability on
the DDM-2000 FiberReach shelf. It allows the transport of DS1 rate
payloads, for up to 12,000 feet, over two metallic 24 AWG twisted-pair lines.
Data is transported over each pair bidirectionally using echo cancellation
techniques.
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