1.8 Toll Restriction (TRS) Features68 Feature Guide1.8 Toll Restriction (TRS) Features1.8.1 Toll Restriction (TRS)DescriptionToll Restriction (TRS) can prohibit extension users from making certain CO line calls, based onthe Class of Service (COS) assigned to them ( Class of Service [602]).Each COS is assigned a TRS level for each time mode; level 1 grants the highest level ofauthorization, allowing all CO line calls to be made, and level 7 grants the lowest level ofauthorization, prohibiting all CO line calls from being made. TRS levels 2 through 6 are usedto restrict calls by combining preprogrammed Denied and Exception Code Tables, explainedbelow.Each COS can also have a separate TRS level applicable to calls made using System SpeedDialing.A TRS check is applied each time a dialed number is sent to a CO line after an extension usergoes off-hook and seizes a line.Denied Code TablesDenied Code Tables are preprogrammed lists containing the first few digits (leading number)of telephone numbers which may not be called. All outgoing CO line calls made by TRS level2 through 6 users are compared to at least one Denied Code Table, and when the leadingnumber of a dialed telephone number (not including the CO Line Access number) matches anentry found in the applicable table, the call is denied.There are five Denied Code Tables. Each table applies to a corresponding TRS level as wellas the level(s) preceding it, as explained below.Exception Code TablesException Code Tables are preprogrammed lists of leading digits or complete telephonenumbers which are checked against every dialed number prohibited by a Denied Code Table.When a user dials a number prohibited by a Denied Code Table, it is compared to at least oneException Code Table. If the dialed number matches an entry found in the applicable ExceptionCode Table, the call is permitted.There are five Exception Code Tables. Each table applies to a corresponding TRS level as wellas the level(s) preceding it, as explained below.TRS Override by System Speed DialingWhen TRS Override by System Speed Dialing is enabled for the PBX, each COS has anadditional TRS level applicable only to calls made using System Speed Dialing.This allows extension users to use System Speed Dialing to make CO line calls which arenormally prohibited by the TRS level of their assigned COS. If, for example, a user’s TRS levelis 7, that user normally cannot make any CO line calls. However, if the same user’s TRS levelfor System Speed Dialing is level 1, the user can make a CO line call to any number stored inSystem Speed Dialing.TRS LevelThe Denied Code Tables and Exception Code Tables which apply to each TRS level areexplained below.
