Datasheet

07
Media Converters & Chassis
DMC-920 Media Converter
Media Converter Features
 Auto negotiation of speed and duplex
mode on TX port
 Auto MDI/MDIX on TX port
 One slide switch for configuring fixed
half/full duplex modes
 Store-and-forward mechanism
 Back-pressure & IEEE 802.3x Flow
Control compliant
 Full wire-speed forwarding rate
 Front panel status LEDs
 Can be used as a stand-alone device or
with chassis
 Hot-swappable when used with chassis
 Manageable through Intelligent Chassis
System
This DMC-920 Media Converter combines transmit and receive signals onto one fiber strand by using two
wavelengths. This design avoids the budget losses incurred by single-wavelength single-fiber technology,
and minimizes the possibility of reflections in the system. The units on both ends of a link are different.
One module uses one wavelength to transmit and a second wavelength to receive, while the other module
reverses that relationship. For this reason these units must be used in pairs. A pair of one-channel single
fiber is used for media conversion between 10/100BASE-TX and 100BASE-FX.
- DMC-920R: This media converter implements 1310 micron for TX, 1550 micron for RX.
- DMC-920T: This media converter implements 1550 micron for TX, 1310 micron for RX.
The DMC-920 supports 9/125 um and 10/125 um single mode fiber up to 20 km in length.
Technical Specifications
Physical &
Environmental
LEDs
Per device: Power, Speed (100 Mbps)
Per port: Full Duplex/Collision, LINK/ACT
AC Input
7.5 V 1.5 A external power adapter
Maximum Power
Consumption
7.2 W
Dimensions
120 x 88 x 25mm (4.72 x 3.46 x 0.98 inches)
Weight
305 g (0.67 pounds)
Operating Temperature
0 to 40 ˚C (32 to 104 ˚F)
Storage Temperature
-25 to 70 ˚C (-13 to 158 ˚F)
Operating Humidity
10% to 90% non-condensing
EMI
FCC Class A, CISPR Class A, CE Class A, VCCI Class A
Fiber Wavelength
DMC-920R: Tx 1310 nm, Rx 1550 nm
DMC-920T: Tx 1550 nm, Rx 1310 nm