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Initiating Communication Path Loopbacks
564 Avidia System Configuration and Management User Manual
The following table lists supported loopbacks.
Initiate loopbacks from the
OC3 Configuration, DS1 Configuration or DS3 Configuration window,
depending on the type of card. To open the configuration window for the card:
1 Do one of the following to open the Port Configuration - Slot/Port Selection window:
• In the
Site Map Navigation window, click Port Configuration.
• In the
Tree Navigation window, click Configuration Management, Service Provisioning, Port
Configuration
.
Loopback
Type
Card(s)
Supported
Description
Local OC3
DS1
DS3
For this loopback, the signal is looped back within the line card at the
transceiver.
Line OC3
DS1/DSX-1
DS3
For this loopback, the signal is received at the line interface and is looped
back through the transmitter. The near-end interface receives the
loopback from the far-end device. You can activate this test either from
the near-end or far-end.
A line loopback tests the complete signal for the port, including channels
that are blocked by the user.
Payload DS1/DSX-1 For this loopback, framing for the DS1/DSX-1 port must be set to ESF.
The DS1/DSX-1 card loops the payload (192 bits) through the receive
section (including the framer) and to the transmit section, returning the
payload and the newly generated ESF framing.
Remote DS1/DSX-1
DS3
For this loopback, the signal is sent to the far-end where it is looped
back. This loopback tests the entire data path to the far-end.