ADC AVIDIA SWD4573I1 - Manual (Page 590)

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.