User's Manual

Table Of Contents
single mode with LC connectorFibre
with RJ45 connectorCopper
There can be one of the following scenarios:
messagescenario
The SFP vendor string read out of SFP module. The vendor,
model, connector (RJ45/LC) and wavelength values are shown.
SFP OK
Separate window with more detailed information can be opened
by clicking the more... link.
No SFP moduleNo SFP
n/aread error
no SFP
option
Port enable
The port can be enabled or disabled.
WARNING: When the port is disabled, no communication is possible through
this port.
Auto negotiation
Auto-Negotiation is an Ethernet procedure by which two connected devices choose
common transmission parameters, such as speed, duplex mode and flow control.
In this process, the connected devices first share their capabilities regarding these
parameters and then choose the highest performance transmission mode they
both support.
The device supports three types of Auto-Negotiation:
10/100/1000BASE-T Copper Auto-Negotiation. (IEEE 802.3 Clauses 28 and
40)
1000BASE-X Fiber Auto-Negotiation (IEEE 802.3 Clause 37)
SGMII Auto-Negotiation (Cisco specification)
Auto-Negotiation provides a mechanism for transferring information from the local
unit to the link partner to establish speed, duplex and Master/Slave preference
during a link session.
Auto-Negotiation is initiated upon any of the following conditions:
Power up reset
Hardware reset
Software reset
Restart Auto-Negotiation
Transition from power down to power up
The link goes down
The 10/100/1000BASE-T Auto-Negotiation is based on Clause 28 and 40 of the
IEEE 802.3 specification. It is used to negotiate speed, duplex and flow control
over CAT5 (or higher) UTP cable. Once Auto-Negotiation is initiated, the device
determines whether or not the remote device has Auto-Negotiation capability. If
so, the device and the remote device negotiate the speed and duplex with which
to operate.
If the remote device does not have Auto-Negotiation capability, the device uses
the parallel detect function to determine the speed of the remote device for
100BASE-TX and 10BASE-T modes. If a link is established based on the parallel
93© RACOM s.r.o. RAy2 Microwave Link
Configuration