Nortel Networks OPTera Metro 3500 - Manual (Page 88)

2-50 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
DWDM configurations
The following OMX configurations are supported:
• hubbed-ring
• a meshed-ring
• linear point-to-point
Hubbed-ring configuration
The hubbed-ring configuration is optimized for traffic flows that are
characteristic of access networks. For an example of a hubbed-ring
configuration, see
Figure 2-24 and Figure 2-25 .
Each OPTera Metro 3500 shelf can support one fully protected optical channel
between the OADM shelf and the terminal, or two unprotected channels. More
than one OPTera Metro 3500 shelf can be installed at an OADM site to provide
additional add/drop capacity as required.
Multiple OPTera Metro 3500 shelves are installed at the terminal, one for each
OADM shelf in the hubbed ring. Four wavelengths are grouped into one band.
The same wavelength band is assigned to the terminal shelf and the
corresponding OADM shelf.
Figure 2-24
Physical connections in a hubbed-ring configuration
EX0812t
1 2 3
Terminal site
3
OADM site
2
1
OADM site
OMX
OMX OMX OMX
OMX
OMX