OTM was introduced because TDM Time Division Multiplexing couldn't be use for Optical Links
OPTICAL TDM NETWORKS
1.Transparent DWM Network
A network which doesn't require any OEO Optical-Electric-Optical conversion
2.OPAQUE DWM Network
A network which completely blocks a signal
3.Translucent DWM Network
A network which doesn't block the signal, signal is sent using optical bypass
OPTICAL TDM NETWORKS
- OTDM requires the use of very short optical pulse because these network operates at a rate of 100 Gbps & above
- At such high rates transmission properties of the optical fiber interact with optical signal
- In particular , dispersion has a great impact on distance bandwidth product OR BL product
- OTDM is synchronization dependent
- To maintain synchronization at rate of 100 Gbps & above is challenging
- Lack of synchronization may result in collision on the channel
- TDM frame structure dictates the transmissions & reception of client traffic & thereby destroy the transparency against different protocol
- Protocol transparency is a problem in OTDM network
1.Transparent DWM Network
A network which doesn't require any OEO Optical-Electric-Optical conversion
2.OPAQUE DWM Network
A network which completely blocks a signal
3.Translucent DWM Network
A network which doesn't block the signal, signal is sent using optical bypass
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