Optical Switch Unit NSW Series

• Optical Switch Unit NSW provides you with high reliability for optical network facilities, including core, edge and access networks, by switching optical fiber circuits between main and standby automatically with optical power level monitoring
• Optical Switch Unit NSW is highly flexible in customization, provides protection to various optical network paths and devices, and provides swiftness, safety and stability in operation and maintenance

• With plug-in module design, optimum configuration can be selected to suit the scale of your application. (Selectable modules: 1×2/2×4/2×2 switches, single-mode/multi-mode fibers, with/without optical power detection, SC/SC-APC/LC/MU connectors)
• Up to 4 plug-in modules for max. 8 optical switches (1×2, 2×4 or 2×2) can be accommodated in 1U chassis
• Switching time of 10ms (max.) minimizes the video frame drops when hot switching video signals
• Highly reliable optical switching devices conforming to Telcordia GR-1221 and GR-1073 are employed. (FIT=60)
• Self-latching optical switching devices maintain switching status in case of power shutdown or reconnection
• Multiple optical switches can be grouped together for interlocking operation in response to Link Aggregation environment.
• Web-based control panel, SNMP-based management and telnet/SSH operations are available for response to various operating conditions

Optical Switch Module Configurations

1. 1×2 Optical Switch Module
   
   
2. 2×4 Optical Switch Module
   2 optical paths are switched together in a single switching device.
   
   
3. 2×2 Optical Switch Module
   Inter-exchanges 2 optical fibers and 2 network equipment ports.
   
   

Notes :

Each module contains 2 optical switches Both SM and MM switch modules are available

Application 1
Additional Security in Network Equipment Systems

• Redundant Routers for Backup



• Redundant ATM Switches for Backup

Application 2
Automatic Switching of Transmission Paths

• Redundancy in Backbone

Application 3
Applicable to Link Aggregation Environment

• Redundancy in Link Aggregation



• Max. 8 optical switches can be interlocked
• By selecting the majority switching logic, it is possible to switch to the side where more channels are available with present optical power as shown in the table on the right
• 2 optical channels trunked together by link aggregation can be connected to 2 interlocked optical switches. When optical power drop in one active port is detected, interlocked 2 optical switches are switched together maintaining the total bandwidth of 2 optical channels.

ACT		STBY		transition
CH1	CH2	CH1	CH2
				None
				ACT→STBY
				None
				STBY→ACT
				None
				ACT→STBY
				None
				None

Application 4

Reference Example, Internet Multifeed Co.
Internet Multifeed Co., one of the largest Internet Exchange providers in Japan, offers a successful service called "JPNAP" which utilizes NTT-AT's NSW series optical switching units to improve network availability by instantaneously switching network equipment.

*	Use of NTT-AT's Optical Switch Unit NSW Series is introduced as "Intelligent Optical Switch" on the linked page given above.

The following management interfaces are available.

• 10/100Base-T LAN interface for Web, Telnet, SNMP and TFTP controls
• RS-232C for Console Command

• Web-based control panel indicating the optical switch status
  
  

• Optical power level can also be monitored remotely
  
  

Number of Slots	Max. 4 plug-in modules / 1U Base Unit
Number of Channels	Max. 8 switching channels / 1U Base Unit
Optical Fiber Types	SM, MM
Optical Switch Types	1×2, 2×2 and 2×4
Dimensions	Rack mountable 1U height : 480(W) × 380(D) × 44(H) mm
Weight	Approx. 8kg including 4 plug-in modules
Power Supply	AC85 ~ 265V (DC36 ~ 76V optional)
Power Consumption	20W (max.)

*	Design and specifications are subject to change without prior notice.