Medias Mediatrix 1204, Справочное руководство

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Chapter 3 - Web Interface – Management Network Settings
36 Mediatrix 1204
A half-duplex connection refers to a transmission using two separate channels for transmission and
reception, while a full-duplex connection refers to a transmission using the same channel for both
transmission and reception.
If unknown, select Auto detect so that the Mediatrix 1204 can automatically detect the network
speed.
3. Click Submit if you do not need to set other parameters.
Speed and Duplex Detection Issues
There are two protocols for detecting the Ethernet link speed:
An older protocol called parallel detection.
A more recent protocol called auto-negotiation (IEEE 802.3u).
The auto-negotiation protocol allows to detect the connection speed and duplex mode. It exchanges
capabilities and establishes the most efficient connection. When both endpoints support the auto-negotiation,
there are no problems. However, when only one endpoint supports auto-negotiation, the parallel detection
protocol is used. This protocol can only detect the connection speed; the duplex mode cannot be detected. In
this case, the connection may not be established.
The Mediatrix 1204 has the possibility to force the desired Ethernet link speed and duplex mode by disabling
the auto-negotiation and selecting the proper setting. When forcing a link speed at one end, be sure that the
other end (a hub, switch, etc.) has the same configuration. To avoid any problems, the link speed and duplex
mode of the other endpoint must be exactly the same.
Caution:
Whenever you force a connection speed / duplex mode, be sure that the other device and all
other intermediary nodes used in the communication between the two devices have the same configuration.
See
“Speed and Duplex Detection Issues” on page 36 for more details.