Next show in
 d  h  m
13 September 2011

 BTI Systems has announced a simplification to the provisioning and management of optical services in the metro network. The Ottawa-headquartered company has added what it dubs a “dynamic optical layer” to its BTI 7000 packet optical platform to enable metro services without requiring detailed networking planning. The BTI 7000 platform supports 40 DWDM channels and an advanced reconfigurable optical add-drop multiplexer (ROADM).

“We focus on the [metro] edge and aggregation, and a lot of the competitive network builds,” said Glenn Thurston, vice-president of global marketing at BTI Systems. “What we find is these people [customers] don't have the skilled optical planning departments the tier-one operators have.”
Services are becoming more varied in the metro aggregation network with the result that traffic growth is unpredictable, says Thurston. These services include mobile broadband backhaul, Ethernet for enterprises and data centre connectivity. “You are not sure what is coming in the metro – you are going to see 1 Gig, 10 Gig, 100 Gig – and there are going to be all sorts of wavelength requirements,” said Thurston. 
BTI's dynamic optical layer is designed so that operators don't need to pre-plan, yet can adapt to changing capacity requirements. To this aim, the company has developed a compact ROADM-on-a-card and a common amplifier design.  
The ROADM is either a 2-degree or 4-degree design with a flexible spectrum grid to support future light paths at speeds beyond 100Gbps.  The amplifiers used for the ROADM are the same as those used for the optical line. Using a common amplifier design for both avoids the need for complex line planning, says Thurston. The ROADMs share power level information using the optical supervisory channel; the information is fed to the management system as part of the automation prior to channel provisioning. 
Having the dynamic optical layer will also enable operators to reroute traffic away from congested routes or choose links based on certain characteristics such as the shortest path or lowest latency. “You can turn these into service parameters on your control system going forward,” said Thurston.
The dynamic optical layer-enabled BTI system is already with first customers and carrying live traffic.   
By Roy Rubenstein