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You can use this screen to perform loop back testing on a digital trunk.
Information Displayed
-
Loopback Status
You can use this drop-down to show and set the type of loopback applied to the currently selected channel or channels. The options are
None
,
Payload
,
Line
and
Line (Anti Jitter)
.
-
Admin State
You can use this drop-down to show and set the
Admin State
of the currently selected channel or channels.
-
Changes made using System Status only apply to the channel whilst running System Status. They do not override the system configuration settings.
-
To perform loopback testing, select
Whole Line
and set the
Admin State
to
Out of Service
. The changes applies to all channels.
-
Selecting
Whole Line
and setting the
Admin State
back to
In Service
returns the status of each channel back to their current configuration settings.
-
Test Type
You can use this drop-down to select the type of loopback testing used. The options are
Pseudo-random 15 bit
or
Pseudo-random 20-bit
.
The table lists the individual channels provided by the trunk. Selecting a particular channel allows you to change the change the settings of the channel and perform loopback testing on that channel. The Whole Line row allows you to perform the same action on all the channels at the same time.
-
Channel Number
The individual channel number.
-
Call Ref
The call reference of the current call on the channel.
-
Admin State
The admin status of the individual channel. See above.
-
Loopback Status
The loopback status of the individual channel. See above.
Buttons
The following buttons can appear on this screen:
-
Call Details
Displays
call details
for the selected call, trunk or trunk channel.
-
Disconnect
Clears the current call. The button cannot stop alerting calls on Loop Start, T1 Loop Start and T1 Ground Start lines.
-
Inject Error
Insert an error into the digital trunk during a loopback test.
-
Reset Trunk
Reset the selected digital trunk.
-
Start Test
Start loopback testing on the trunk. You can only start testing when the
Whole Line
is set to
Out of Service
. When testing starts, the test results appear below the list of channels. During the test, the button label and function changes to
Stop Test
.
-
Stop Test
Stopt loopback testing on the selected trunk. The button label and function changes to
Start Test
.
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