Perle 10G Media Converter module Installation Guide
8
Test Function (Switch 2
– Test Mode)
Switch Position
Type
Up (default)
Built In Link Test
Down
Loopback
Built In Link Test:
Switch 2 causes the C/CM-10G media
converter module to initiate the Built In Link Tests on the specified
port. Switch 3 determines the specified port for the Built In Link
Tests. If Switch 3 is Up, the tests will be run on Port 1. If the
Switch is Down the tests will be run on Port 2. The other port will
be disabled during these tests.
These tests consist of the media converter module generating test
patterns to be sent out the selected port to the remote media
converter module. If the remote media converter module is a
supported Perle media converter/module, the port will
automatically be put into loopback mode.
Loopback:
If Switch 2 is down, the specified port will be put into
loopback mode. In this mode, the port will be ready to receive the
test patterns generated by another Perle media converter/module
running the Built In Link Test. Switch 3 determines which port with
be put into loopback mode. If the remote device is a supported
Perle media converter/module, this unit does not need to be put
into test mode and there is no need to set the loopback switch.
This will be taken care of by the Auto Loopback Detect feature.
Illustration of the Built In Link Test / Loopback
