Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Applications
Issue 3 June 2001
2-13
OC-3 Ring with OC-12 Ring Transport 2
If fiber exhaustion is a problem, the 2000 Product Family provides several
alternatives for the network planners to pick from, depending on the specifics of
their application. If fiber is available, multiple DDM-2000 OC-3 Multiplexer rings
can be installed; or if fiber is unavailable or if the administrative ease of a single
ring is desired, a single DDM-2000 OC-12 Multiplexer ring can be installed. Fiber
exhaustion often occurs when customer demand for voice, DS1, and DS3
services grows to fill the OC-3 ring's capacity. If the growth has come from only
one or two sites and there is spare fiber in place, these high demand sites may be
cut to a new OC-3 ring without interrupting service. Alternatively, driven by fiber
exhaustion or evolution to customer DS3 services, the OC-3 ring may be
upgraded in service to an OC-12 ring. In this configuration (Figure 2-8),
DDM-2000 OC-3 Multiplexer equipment is colocated with a DDM-2000 OC-12
Multiplexer shelf to provide a unified VT1.5 path switched ring node with an OC-
12 high-speed interface.
Figure 2-8. OC-3 Ring with OC-12 Ring Transport
OC-12
DDM-2000
OC-12
DDM-2000
OC-12
DDM-2000
OC-12
OC-12
OC-12
OC-12
OC-3 OC-3
DDM-2000
OC-3
0 X 1
Network
Interface
DS1, DS3, EC-1
Network
Interface
DDM-2000
OC-3
DS1, DS3, EC-1
0 X 1
0 X 1
Network
Interface
DS1, DS3, EC-1
Customer
Premises
Customer PremisesCustomer Premises
DS1, EC-1, OC-3, OC-3c
DDM-2000
OC-3
Access Provider Network
OC-3
CO
RT
RT
RT
DDM-2000
OC-3/OC-12

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English