Connection to the Network
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There is a port specific operation mode that is complementary to the global operation
mode. Both the global and the port specific operation modes are combined to
determine which tests and which capabilities are available at any moment.
Ethernet cable test This is the correct mode to check the UTP / FTP / STP cable
transmission parameters like the wire map, skew and MDI /
MDIX port status. If there is any cable fault like an open or a
short circuit, it is detected and an estimated distance to the
fault is displayed.
If this mode is enabled, port B is forced to a Link status and
port A is set to an special Cable test status that is specifically
used for cable tests.
L1 endpoint This is a mode specifically conceived for physical layer BER
tests. When the equipment is configured in this mode is una-
ble to generate user-configurable frames but it can still gen-
erate and analyse the PCS codes required for BER testing at
L1.
Table 2.2: Port Modes
Mode Description
TX / RX Both transmission and reception are enabled in the port. The
transmitter is connected to the internal test traffic generator.
This is the port mode to be used most of the times for testing
in endpoint mode.
Monitor The port is configured in promiscuous monitoring mode and
the port transmitter is disabled. All kinds of traffic generation
are disabled in Monitor mode but the equipment can still
reply to some ARP and ICMP requests for technical reasons.
Use this mode if you want to get statistics about the network
traffic, including traffic from remote test unit but you don’t
want to disturb the network with any test traffic internally gen-
erated by the unit.
Loopback The port receiver is connected to the transmitter so that part
or all the received frames are sent towards the origin.
This port mode is used guarantee the continuity of the test
payload or pattern to in two-way tests.
Table 2.1: Global Ethernet Operation Modes
Mode Description
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