NTT-AT to sell intelligent optical switchers with an automatic switching function

The new optical switchers will form a part of ASW Series of small, all-in-one, optical switchers, which have been sold by NTT-AT since November 2001. They provide all the features of the existing ASW Series switchers, such as high-speed switchover, taking less than 10 ms, low insertion loss, a self-holding function to guard against power supply outage, and 10-Base-T/RS-232C control interfaces. In addition, the new switchers now monitor the input light level constantly, and, when an interruption in the input light is detected, optical fiber transmission links are switched automatically.

As broadband services, such as access services using optical fiber, increasingly find their way into businesses and homes, optical switchers have become important elements in various applications, such as building and efficiently operating a reliable network, switching optical transmission links from the active system to a standby system, and updating network devices without any interruption to service. Under these circumstances, the ASW-Series small optical switchers have been well accepted not only because they are small in size, but also because they are easy to use.

The new intelligent optical switchers, ASW-122A/123A, now provide the long-awaited function of automatically switching optical fiber links. Conforming to Telcordia standards, they are highly reliable, and, unlike competitive products, they can be monitored and managed and have logs recorded via an Ethernet using a Web browser. ASW-122A/123A enable the user not only to enhance his or her system but also to reduce the overall system management cost.
Starting the end of February 2003, NTT-AT will sell the ASW-122A (4-ch version) at 1650,000 yen (consumption tax not included), with communications carriers and system integrators both in Japan and abroad as target customers. For the price of the ASW-123A (2-ch version), please contact us.

Prior to the start of sales in February, the new switchers will be exhibited at the Fiber-Optics EXPO to be held at Tokyo Big Sight from January 22 to 24, 2003.

Features

1. Input light level is monitored constantly to detect any interruption to the input light signal and to switch optical transmission links when an interruption is detected.
2. Web-based remote monitoring, management and log recording;
3. Highly reliable optical switch conforming to Telcordia standards;
4. High-speed switchover, low insertion loss and low crosstalk;
5. All-in-one functions, including controller, in a small package;
6. Self-holding function and low power consumption.

Specifications

Type name	ASW-122A	ASW-123A
Switch configuration	(1×2)×4	(1×2)×2
Switchover time	10ms or less
Insertion loss	2dB or less
Return loss	45dB or more
Crosstalk	-65dB or less
Disconnection detection level	-20 to -40dBm (in steps of 5dB)
Switchover protection time	0, 20, up to 2000ms (in 10 steps)
Optical connector	SC type and MU type
Control interface	10BASE-T, RS-232C
Dimensions	483(W) × 380(D) × 44(H)mm
Power supply	AC100V to 240V
Ambient temperature	0-55 degrees centigrade

Price (provisional)

ASW-122A: 1,650,000 yen (consumption tax not included)
ASW-123A: Prices on application

Start of sales

February 2003