IMC Networks iMcV-T1 Operation Manual page 14

The iMcV-T1/E1/J1 Repeater can be configured to use the following loopback test
modes:
Local Fiber Loopback Mode
Remote Fiber Loopback Mode
Remote Copper Loopback Mode
The following illustrations show a typical progression of digital loopback tests; this
series allows the user to individually test each segment of the conversion. To test the
copper segment at the remote location requires the PRBS test described in the next
section.
Local Fiber Loopback Mode
To set the loopback testing mode to Local Fiber Loopback Mode, perform the
following:
1. Set the Local iMcV-T1/E1/J1 Repeater module to Remote Loopback
(DIP Switch S3-3=Off and S3-4=Off)
2. Set the Remote iMcV-T1/E1/J1 Repeater module Loopback to None
(DIP Switch S3-3=On and S3-4=On).
This configuration allows the user to test the path from the CO copper port to the
Local iMcV-T1/E1/J1 Repeater module fiber port and loop it back. The transmitted
data is sent unhindered and the received data is ignored.
This setting tests the path from the CO copper
port to the Local iMcV-T1/E1/J1 Repeater
module fiber port and back.
This setting tests the path from the CO copper
port to the Remote iMcV-T1/E1/J1 Repeater
module fiber port and loops it back.
This setting tests the path from the CO copper
port to the Remote iMcV-T1/E1/J1 Repeater
module copper port and loops it back.
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