Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Transmission and Synchronization Interfaces
5-24 Issue 3 June 2001
OC-1/OC-1 Function Unit Hairpin Ring 5
The OC-1/OC-1 Function Unit Hairpin Ring is the interconnection of two OC-1
rings terminated in function units. Figure 5-15 through Figure 5-18 show four
configurations of OC-1/OC-1 function unit hairpin rings. Each OC-1 ring
terminates on 0x1 protected 27G2-U OLIUs. In the single homing cases, both
rotations of an OC-1 ring terminate on a pair of 27G2-U OLIUs in the same
function unit. In the dual homing cases, each rotation of an OC-1 ring terminates
on a 27G2-U OLIU in a function unit in a different OC-3 shelf.
Figure 5-15. OC-1/OC-1 Function Unit Hairpin Ring—Inter-Function Unit
Single Homing
O
L
I
U
O
L
I
U
Main-1
Main-2
FN ( )-1
FN ( )-2
OC-1
OC-1
DDM-2000
OC-3 Shelf
26-type
OLIU
26-type
OLIU
Main-1
Main-2
FN ( )-1
FN ( )-2
OC-1
OC-1
26-type
OLIU
26-type
OLIU
FN ( )-2
tpa 851668/01
DS1/T1 DS1/T1
DDM-2000
FiberReach
Shelf
DDM-2000
FiberReach
Shelf
* Main -1
* Main -2
* Main OLIUs required for hairpin cross-connects
26G2-U
or
27G2-U
OLIUs
26G2-U
or
27G2-U
OLIUs

Lucent Technologies DDM-2000 OC-3 Specifications

General

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