Nortel Networks NTRN10AN, 3500 manual Dense wavelength division multiplexing Dwdm

2-46Operation, administration, and maintenance (OAM) features

Note 2: Switching from SONET mode to Superset mode results in a warm restart of the shelf processor.

Dense wavelength division multiplexing (DWDM)

OPTera Metro 3500 supports dense wavelength division multiplexing (DWDM) technology. Information is multiplexed over specific wavelengths called optical channels. Users can combine the supported wavelengths (listed in Table 2-7 on page 2-47) over a single optical fiber using passive optical couplers.

OPTera Metro 3500 Release 12.1 supports:

•nine OC-48 extended reach (ER) DWDM circuit packs operating in the C-Band, with a dispersion of up to 360km.

•sixteen OC-48 long reach (LR) DWDM circuit packs operating in the C-Band

•sixteen OC-48 long reach (LR) DWDM circuit packs operating in the L-Band.

Note: Additional wavelengths for OC-48 DWDM extended and long reach circuit packs may be introduced in the future. See OC-48 DWDM circuit pack on page 3-71.

•nine OC-192 long reach (LR) DWDM circuit packs operating in the C-Band.

Note 1: Additional wavelengths for OC-192 DWDM long reach circuit packs may be introduced in the future. See OC-192 DWDM G.709 FEC optical interface circuit pack on page 3-64.

Note 2: There are four wavelengths (channels) in each band. Each OMX accommodates one band. Combined, the 8 OMX’s can accommodate 32 wavelengths on a single fiber.

Note 3: The OPTera Metro OMX does not support OC-48 DWDM 1535.04 nm, OC-48 DWDM 1555.75 nm, OC-48 DWDM 1596.34 nm, or OC-48 DWDM 1578.69 nm wavelengths.

Note 4: Wavelengths and tolerances of the DWDM circuit packs are in compliance with ITU-T G.692 and ITU-T G.694 specifications.

The channels follow ITU-T G.692 and ITU-T G.694 recommendations. The wavelength grid is identical to the wavelength grid that is used for the Nortel Networks OPTera Metro 5200 Multiservice Platform and Nortel Networks TransportNode OC-48 products. See Figure 2-22for ITU-T grid details.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004