director 2/64 service manual

1–20 director 2/64 service manual
General Information
• Shortwave Laser—Shortwave laser transceivers provide connections for
transferring data over short distances (2 to 500 meters) through 50-micron or
62.5-micron multimode fiber.
• Longwave Laser—Longwave laser transceivers provide connections for
transferring data over long distances (up to 10 kilometers) through 9-micron
singlemode fiber.
• Extended-Reach Longwave Laser—Longwave laser transceivers provide
connections for transferring data over extended distances (up to 35 kilometers)
through 9-micron singlemode fiber.
Power Supply
Redundant, load-sharing power supplies step down and rectify facility input power to
provide 48-volt direct current (VDC) power to director FRUs. The power supplies also
provide overvoltage and overcurrent protection. Either power supply can be replaced
while the director is powered on and operational.
Each power supply has a separate backplane connection to allow for different AC
power sources. The power supplies are input rated at 85 to 264 volts alternating
current (VAC). The faceplate of each power supply provides the following status
LEDs:
•A green PWR OK LED illuminates if the power supply is operational and
receiving AC power.
• An amber FAULT LED illuminates if the power supply fails.
• An amber TEMP LED illuminates if the power supply shuts down due to an
overtemperature condition.
•An amber I LIM LED illuminates if the power supply is overloaded and operating
at the current limit (15.6 amperes).
Power Module Assembly
The power module assembly is located at the bottom rear of the director. The module
is a nonconcurrent FRU, and the director must be powered off prior to scheduled
removal and replacement. The module provides:
• Two single-phase AC power connectors. Each connector is input rated at 85 to 264
VA C .