Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Circuit Pack Descriptions
7-76 Issue 3 June 2001
General Description of Operation 7
The STS1E circuit pack provides bidirectional transport of one EC-1 signal
through the DDM-2000 OC-3 Multiplexer and has two operating modes, EC-1
low-speed (Figure 7-29a) and EC-1 high-speed (Figure 7-29b).
In the low-speed mode, the STS1E circuit pack interfaces with the OLIU circuit
pack at the STS-1 rate (51.84 Mb/s). In the high-speed mode, the STS1E circuit
pack interfaces with the DS1/DS1PM circuit pack at the VT-G rate (6.192 Mb/s).
The STS1E circuit pack interfaces with the SYSCTL for maintenance,
provisioning, and PM functions and interfaces to the TG circuit pack for timing.
Figure 7-29. STS1E Circuit Pack Low-Speed and High-Speed Modes
Circuit Pack
OC-3
Signal
OLIU Circuit
Pack
STS-1
Signal
EC-1
Signal
Transmit
Direction
Backplane
DS1
Signal
STS1E
(b) High-Speed Application
STS1E
Circuit
Pack
DS1/DS1PM
Circuit Pack
Transmit
Direction
EC-1
Signal
VT-G
Signal
(a) Low-Speed Application
Backplane

Lucent Technologies DDM-2000 OC-3 Specifications

General

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