Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Maintenance Description
Issue 3 June 2001
9-31
Path Protection - Locked DS3 Cross-Connect 9
Figure 9-15(a) illustrates path-switched protection for a locked DS3 cross-
connect. In this example, full multimedia data services, such as Ethernet, Token
Ring, ATM, etc., are routed around the ring and through each Data Services
Device on STS-1 #1. In the event of a service interruption, as indicated by the “X”
in Figure 9-15(b), Data Services Device A reroutes traffic between itself and Data
Services Devices B and C.
Figure 9-15. Locked DS3 Cross-Connect Path Protection Switching
DDM-2000
DDM-2000
DDM-2000
OC-N
PATH
SWITCHED
RING
DS3DS3
DS3 DS3
STS-1 #1
STS-1 #1
STS-1 #1
STS-1 #1
DATA
SERVICES
DEVICE C
LAN
DATA
SERVICES
DEVICE A
LAN
Re-routes traffic
between Devices
B and C
Re-routes traffic
between Devices
B and C
DATA
SERVICES
DEVICE B
LAN
DDM-2000
DS3
DS3
DDM-2000
DDM-2000
DDM-2000
OC-N
PATH
SWITCHED
RING
DS3
DS3
DS3 DS3
STS-1 #1
STS-1 #1
STS-1 #1
DATA
SERVICES
DEVICE C
LAN
DATA
SERVICES
DEVICE A
LAN
DATA
SERVICES
DEVICE B
LAN
DDM-2000
DS3
DS3
tpa 852267-01
(a) (b)

Lucent Technologies DDM-2000 OC-3 Specifications

General

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