Nortel Networks OPTera Metro 3500 - Manual (Page 87)

Operation, administration, and maintenance (OAM) features 2-49
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Additional OMX modules are required for each DWDM band. The DWDM
bands can be multiplexed onto one optical fiber to daisy-chain the OMX
modules together.
OMX modules can be interconnected within the OMX shelf to provide a
working and protection traffic path. A single OMX module supports
unprotected traffic.
Figure 2-23
OPTera Metro 3500 and OMX interconnect
EX0783p
Note: Site Manager and Preside Network Manager do not support
wavelength and OMX module visibility in Release 12.1.
Network sites
There are two types of sites in an OPTera Metro 3500 network:
• terminal sites
• optical add/drop multiplexer sites (OADM)
Terminal sites consist of OPTera Metro 3500 shelves that are provisioned as
terminal shelves. At a terminal site, there must be a terminal shelf for every
wavelength channel used in the network. Wavelengths must be added or
dropped at a terminal location. Terminal sites are sometimes called hub sites
when used in hubbed-ring configurations.
At an OADM site, single or multiple OPTera Metro 3500 shelves are placed to
gain access to specific wavelengths in the system, so that some wavelengths
are terminated, and some are optically passed through at that location. OADM
sites are sometimes called remote sites.
OMX
shelf
λ1 λ3 λ4 λ2
Single
patch fiber
Single fiber
3500
shelf 3500
shelf 3500
shelf 3500
shelf
OMX
shelf
λ5 λ7 λ8 λ6
3500
shelf 3500
shelf 3500
shelf 3500
shelf