From the Avaya Administrators Guide:
"Loss plans determine the amount of loss (quieter) or gain (louder) applied on calls. Usually, your system uses a pre-defined loss plan that is base on the administered country code. In some circumstances, you may be able to change the loss plan used by your system on a per trunk or per phone basis.
CAUTION: The values in the loss plan can significantly affect the quality of service that your users experience. Therefore, in order to change the loss plan you must thoroughly understand loss plans and your particular configuration. We recommend that you seek technical assistance from Avaya before making any modifications to the loss plan."
Susan
"'I wish life was not so short,' he thought. 'Languages take such a time, and so do all the things one wants to know about.'"
- J. R. R. Tolkien, The Lost Road