Nortel RLC Installation And Administration Manual page 240

Configuring the RLC
Quality of Service field descriptions
Field
Status
Threshold: Signal
Degrade
Threshold: Signal Recover
Duration: Signal Degrade
Duration: Signal Recover
Number of Switches
before Lockout
214
Description
Click on the Enable option button to allow QoS
transitions to occur when the QoS on the IP network
degrades.
Click on the Disable option button if you do not want
to use the QoS Transitioning Technology.
The default is Enable.
Move the indicator to the appropriate point on the sliding
scale, a relative value between poor and superior.
Move the indicator to the appropriate point on the sliding
scale, a relative value between poor and superior.
Enter a value, in seconds, between 1 and 60.
If poor voice quality lasts for the specified duration, then
calls are moved from the IP network to the PSTN.
The default is 15 seconds.
Enter a value, in minutes, between 1 and 10.
When the improved voice quality lasts for the duration
value chosen (in minutes), then calls are moved back to the
IP network.
The default is 10 minutes.
Enter the number of transitions between the IP network
and PSTN in any 24-hour period that causes the RLC to
stop making the transition.
The default is NC (Not Configured).
RLC Installation and Administration Guide
Standard 4.0