We are honored to have been selected as the supplier of the APG system and firmly believe that once completed, APG will have a significant impact and NEC's state of the art advanced Digital Coherent 40G SLTE's and OADM
Branching Units will contribute to the economies of Asia and its surrounding countries," said Mr.
An OADM may be considered to be a specific type of optical cross-connect.
All the light paths that directly pass an OADM are termed cut-through lightpaths, while those that are added or dropped at the OADM node are termed added/dropped lightpaths.
For transmitting data, these OADMs take in various optical input sources (Fibre Channel, ESCON, HCON, GigE, etc.
OADMs are bit-rate and protocol independent, enabling multiple channels with different data formats and different data rates to be transmitted together as separate wavelengths.
Global consumption of OADMs
was $101 million in 2001 and will surge to $1.
Drop & Add" and "Drop & Pass" OADM
modules provide the ability to terminate ("Drop") one or more of the wavelengths from the fiber locally and allow the other wavelengths to continue ("Pass") to other nodes.
One is a simplified ROADM that can be added to an OADM
network with nominal incremental costs.
The new switch is expected to enable the development of Dynamic OADMs
essential for next-generation optical transmission networks.
A series of programmable OADMs
in 4x4, 8x8, 16x16 and 20x20 configurations are available, with 50 GHz, 100 GHz, 200 GHz ITU grid spacing for both C- and L-Bands.
In particular, express traffic transmitted very long distances can be shared with the same common equipment that supports segmented traffic that is added and dropped frequently at the OADMs
The A1020M is a 1RU device that can be used with Avvio Networks' A15XX family of passive OADMs
and EDFAs for a complete end-to-end solution.