Chapter 3. Operation
14
Quad Nx 56/64 Module User Manual
61200.184L1-1
Test
This menu item is used to activate testing of specific data ports. It also con-
trols the activation of loopbacks and the initiation of data test patterns.
Test results are displayed on the ATLAS 800 front panel.
The execution of Port Tests disrupts normal data flow in the port being tested.
Loopbk
Write security: 4; Read security: 5
Controls the activation and deactivation of loopbacks.
Loopback Status
Read security: 5
This read-only option indicates a port’s current loopback status by dis-
playing any of the following status messages:
• No loopback active
• Looping up remote unit
• Remote unit looped back
• Looping down remote unit
• Remote loopup failed
• Port looped from remote source
• Port loopback active
511 (511 Test Pattern)
Write security: 4; Read security: 5
Controls the activation of the 511 test pattern generator and detector.
511 Result
Read security: 5
Displays the results of the 511 test. This option is read-only.The results are
in the form of the number of errored seconds.
No Loopback
The loop is deactivated.
Local Loopback
The Nx port activates both a local loopback (back to-
ward the DTE) and a port loopback when invoked.
Remote Loopback
The remote loopback causes a V.54 loopback code to
be sent to the far end. If the device at the far end sup-
ports V.54, the device activates a loopback on detec-
tion of the V.54 code.
Off
Turns off the 511 test pattern generator and detector.
On
Turns on the 511 test pattern generator and detector.
Sync
Y (yes), N (no)
ES
Errored seconds. Indicates the number of seconds (after
pattern sync) that have contained at least one error.
