[Flowchart]An extension user tries to
make a CO line call.
Was the number dialed using
System Speed Dialing?
What is the TRS level?
Is the dialed number found in an
applicable Denied Code Table?
Is the dialed number found in an
applicable Exception Code Table?
The call is denied.
The user hears a reorder tone.
Is TRS Override by
System Speed Dialing enabled?
The call is permitted.
Yes
Level 7 Level 1
Levels 2, 3, 4, 5, 6
Yes
Yes
Yes
No
No
No
No
Checks the TRS level of
the extension's COS for
System Speed Dialing.
Checks the TRS level of
the extension's COS in
the current time mode.
Denied 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 level 2 through 6 users are compared
to at least one Denied Code Table, and when the leading number of a dialed telephone number (not including
the CO Line Access number) matches an entry found in the applicable table, the call is denied.
There are five Denied Code Tables. Each table applies to a corresponding TRS level as well as the level(s)
preceding it, as explained below.
Document Version 2008-11 Feature Manual 315
17.1.6 TRS (Toll Restriction)