Ross Opengear FED-6943, User Manual, Page: 62 / 92

8–2 • FET-6946 Setup Fiber Ethernet Switch Transceivers User Manual (Iss. 04)
FET-6946 Overview
The FET-6946 series includes a dual fiber SFP, three copper (RJ45) ethernet ports, and two
bi-directional SFP transceivers. The bi-directional SFP transceiver operates on different transmit
(Tx) and receive (Rx) wavelengths over a single fiber and contain an internal WDM splitter. This
gives you six links (three fiber and three RJ-45) plus the Internal Link interface. The FET-6946
series requires the
8320AR-057 Full Rear Module.
To make use of the triple fiber bi-directional connection, the cards must be used together in pairs
based on their WDM, ensuring to pair an -A model with a -B model (e.g. pair an FET-6946-20A
with an FET-6946-20B). Refer to
Table 8.1 for details. Alternatively, you could use one
FET-6946 series card connected to a combination of FED-6943 and FES-6941 series cards of the
same WDM. The dual fiber port connection can also connect to a dual fiber connection on a
FES-6942 or FED-6944 card or a generic switch provided that the power levels match.
FET-6946 Functional Block Diagram
This section provides a functional block diagram that outlines the FET-6946 series workflow.
Figure 8.1 FET-6946 Series — Simplified Block Diagram
Table 8.1 FET-6946 Series — Model Pairs
Model Description
FET-6946-20A
Dual bi-directional Fiber 20km WDM 1310nm transmitter and 1550nm
receiver plus 20km 1310nm transmitter and wideband receiver
FET-6946-20B
Dual bi-directional Fiber 20km WDM 1550nm transmitter and 1310nm
receiver plus 20km 1310nm transmitter and wideband receiver
FET-6946-40A
Dual bi-directional Fiber 40km WDM 1310nm transmitter and 1550nm
receiver plus 40km 1310nm transmitter and wideband receiver
FET-6946-40B
Dual bi-directional Fiber 40km WDM 1550nm transmitter and 1310nm
receiver plus 40km 1310nm transmitter and wideband receiver
CARD
CONTROL
AND
MONITORING
10/100/1000
ETHERNET
SWITCH
ETHERNET PORT 3
ETHERNET PORT 2
ETHERNET PORT 1
FIBER IN A
FIBER OUT A
FIBER BI-DIR B
FIBER BI-DIR C
OPTICAL
MODULE
OPTICAL
MODULE
OPTICAL
MODULE
Internal Link
(GigE Connection to
OG3-FR-CN(S)* Midplane)
*Internal GigE connection requires the MFC-8322-N(S) network controller card for the OG3-FR frame.