EDM01-36v10 DAG_9.2X2_Card_User_Guide - Introduction
©2010 - 2012 Endace Technology Ltd. Confidential - Version 10 - May 2012
5
Card architecture
Serial optical data received by the SFP+ optical interfaces flows in to the Field Programmable Gate Array
(FPGA).
The FPGA contains the packet processor and the DAG Universal Clock Kit (DUCK) timestamp engine. The
DUCK provides high resolution per-packet timestamps which can be accurately synchronized to an
external Pulse Per Second (PPS) source.
Note:
For further information on the DUCK and time synchronization see
Synchronizing Clock Time
(page 51).
Line types
It is important that you understand the physical characteristics of the network to which you want to
connect. If your configuration settings do not match your network, the DAG 9.2X2 card will not function
as expected.
There are various Ethernet line speeds and corresponding protocols which are identified using the IEEE
naming convention. Each line speed has a set of requirements associated with it relating to the type of
cable, maximum allowable distance, etc.
Note:
If you are unsure about which of the following options listed to apply to your network, contact your
Network Administrator for further information.
Supported Line Types
The line types supported by the DAG 9.2X2 card are described below.
Type
Description
1000Base-T
1000Mbps over four pairs of balanced Cat5 or Cat6 copper cable.
1000Base-SX 1000Mbps over single mode or multi mode fiber optic cable with short wavelength laser
driver (850nm).
1000Base-LX 1000Mbps over single mode or multi mode fiber optic cable with long wavelength laser
driver (1310nm).
10GBase-SR
10 Gigabit per second over Ethernet multi mode fiber optic cable with short wavelength
laser driver (850nm).
10GBase-LR
10 Gigabit per second over Ethernet single mode fiber optic cable with long wavelength
laser driver (1310nm).
10GBase-ER
10 Gigabit per second over Ethernet single mode fiber optic cable with extended
wavelength laser driver (1550nm).
Note:
For more detailed information regarding Ethernet line types and speeds, please refer to IEEE Standard
802.3AE available from the IEEE website at
www.ieee.org
.
