Applications
Issue 8.0 July 2002
2-43
Figure 2-21 shows two subnetworks with DCC connectivity within the subnetwork.
The OC-3 path-switched rings use part of the bandwidth of the OC-48
bidirectional line-switched rings.
Operations interworking is available among systems that are connected through
an optical interface. The following systems support operations interworking
applications:
■ FT-2000 OC-48 Add/Drop-Rings Terminal (Release 6 and later)
■ DDM-2000 OC-3 Multiplexer (Releases 7.2 and 9 — Rings)
■ DDM-2000 OC-3 Multiplexer (Release 8 — Linear)
■ DDM-2000 OC-12 Multiplexer (Release 5 and later)
■ DDM-2000 FiberReach (Release 1 and later).
For operations interworking between the FT-2000 OC-48 Add/Drop-Ring Terminal
(Releases 6 and 7) and the DDM-2000 OC-3 Multiplexer, the routing domain and
area fields of the network service access point (NSAP) code at the DDM-2000
OC-3 Multiplexer must be 0 (default value). In Releases 6 and 7, the routing
domain and area fields of the FT-2000 OC-48 Add/Drop-Rings Terminal have a
fixed value (0) and cannot be user provisioned. For any operations interworking
application to work, the network elements (NE) participating in the application
must have the same routing domain and area fields.
If the routing domain and area fields of the DDM-2000 OC-3 Multiplexer are
provisioned to some value other than the default (0), the DDM-2000 OC-3
Multiplexers will not show up in the CONFIGURATION-Retrieve-Map-Network
report and no FT-2000 OC-48 Add/Drop-Rings Terminal can be used as a TL1
gateway network element (GNE) for the DDM-2000 OC-3 Multiplexers.
Operations interworking applications allow users to access, operate, provision,
and administer remote network elements (NE) from any site in a network or from a
centralized operations system through the OC-3 DCC. This reduces the number
of dispatches required to perform operation, administration, maintenance, and
provisioning functions at remote NE. In Release 6 and later releases, the
operations interworking application supports the following single-ended
operations:
■ Remote login: A user logged in locally to an FT-2000 OC-48
Add/Drop-Rings Terminal can log in remotely to a DDM-2000 Multiplexer
via the OC-3 DCC. A user logged in locally to a DDM-2000 Multiplexer can
also log in remotely to any other DDM-2000 Multiplexer within the same
subnetwork via the OC-3 and OC-48 DCC. However, a user logged in
locally to a DDM-2000 Multiplexer cannot log in remotely to the FT-2000
OC-48 Add/Drop-Ring Terminal. For more information about remote
access using the DCC, refer to Volume I, Section 6, “Operations
Interfaces”.
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