Lucent Technologies DDM-2000 OC-12 User Manual

363-206-295
Applications
Issue 1 December 1997 2-25
Like the loop feeder point-to-point applications, the interoffice DDM-2000 OC-3
point-to-point Multiplexer application supports smooth in-service capacity
upgrades using the DDM-2000 OC-12 Multiplexer (Figure 2-15). The initial
DDM-2000 OC-3 Multiplexer shelf is connected in service to the DDM-2000
OC-12 Multiplexer, allowing high-speed interconnection between offices. The
DDM-2000 OC-12 Multiplexer is also well suited for stand-alone interoffice
transport of high-capacity DS3, EC-1, and OC-3c signals. The DDM-2000 OC-12
Multiplexer offers two high-speed optical interfaces: at a wavelength of 1310 nm, it
supports a 51 kilometer (32 miles) span length; and at a wavelength of 1550 nm, it
supports a 100 kilometer (61 miles) span length.
Like the DDM-2000 OC-3 Multiplexers, the DDM-2000 OC-12 Multiplexers allow
independent synchronization of each site from its own office clock and disabling
single-ended operations when the application crosses a maintenance boundary.
Timing can be passed from one office clock to another with a DS1 timing output
derived from an incoming OC-12 signal.
Figure 2-15. OC-12 Point-to-Point Interoffice Configuration (Folded Ring)
OC-12
DDM-2000
Central Office
5ESS
OC-12
DS1
DDM-2000
OC-3
R
Switch
DACS IV-
2000
Maintenance
Boundary
(Disabled SEO)
DDM-2000
Central Office
5ESS
OC-12
DS1
DDM-2000
OC-3
Switch
DACS IV-
2000
FT-2000
System
OC-48
DS3/
EC-1
DS3/
EC-1
DS3/EC-1

Lucent Technologies DDM-2000 OC-12 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-12
Category	Multiplexer
Language	English