Toll Restriction (TRS) can prohibit extension users from making certain CO line calls, based on the 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 of authorization, allowing all CO line calls to be made, and level 7 grants the lowest level of authorization, prohibiting all CO line calls from being made. TRS levels 2 through 6 are used to restrict calls by combining preprogrammed Denied and Exception Code Tables, explained below.
Each COS can also have a separate TRS level applicable to calls made using System Speed Dialing.
A TRS check is applied each time a dialed number is sent to a CO line after an extension user goes off-hook and seizes a line.

Denied Code Tables
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.

Exception Code Tables
Exception Code Tables are preprogrammed lists of leading digits or complete telephone numbers 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 one Exception Code Table. If the dialed number matches an entry found in the applicable Exception Code Table, the call is permitted.
There are five Exception Code Tables. Each table applies to a corresponding TRS level as well as the level(s) preceding it, as explained below.

TRS Override by System Speed Dialing
When TRS Override by System Speed Dialing is enabled for the PBX, each COS has an additional 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 are normally prohibited by the TRS level of their assigned COS. If, for example, a user's TRS level is 7, that user normally cannot make any CO line calls. However, if the same user's TRS level for System Speed Dialing is level 1, the user can make a CO line call to any number stored in System Speed Dialing.

TRS Level
The Denied Code Tables and Exception Code Tables which apply to each TRS level are explained below.
Denied Code Tables^*1
Exception Code Tables^*2
Level 1
Not Programmable
Not Programmable
Level 2
Table for Level 2
Tables for Levels 2 through 6
Level 3
Tables for Levels 2 and 3
Tables for Levels 3 through 6
Level 4
Tables for Levels 2 through 4
Tables for Levels 4 through 6
Level 5
Tables for Levels 2 through 5
Tables for Levels 5 through 6
Level 6
Tables for Levels 2 through 6
Tables for Level 6
Level 7
Not Programmable
Not Programmable
^*1
TRS Denied Code [301]
^*2
TRS Exception Code [302]

[Programming Example: TRS Level]
^*1
TRS Level [501]
^*2
TRS Level for System Speed Dialing [509]
[Flowchart]

WARNING
The software contained in the TRS feature to allow user access to the network must be upgraded to recognize newly established network area codes and exchange codes as they are placed into service.
Failure to upgrade the premises PBXs or peripheral equipment to recognize the new codes as they are established will restrict the customer and the customer's employees from gaining access to the network and to these codes.
KEEP THE SOFTWARE UP-TO-DATE WITH THE LATEST DATA.

•

TRS checks are performed for all calls made by:

—

Any CO line access (Idle Line Access, CO Line Group Access, S-CO Line Access)

—

Automatic Route Selection (ARS)

•

The PBX can also be programmed to perform a TRS check for numbers that contain non-digits (

or #). By default, the PBX ignores ("No Check") any non-digits that are dialed, which is useful in preventing unauthorized calls which could possibly be made using certain telephone company exchanges.

•

TRS can also be programmed to check digits that are dialed after External Feature Access, such as when trying to transfer a call to an outside party. (

1.10.7 External Feature Access (EFA))

•

Host PBX Access Code/Special Carrier Access Code
TRS checks can be carried out on telephone numbers dialed using a Host PBX Access code (

1.5.4.6 Host PBX Access Code (Access Code to the Telephone Company from a Host PBX)) or Special Carrier Access code (

1.5.4.7 Special Carrier Access Code).

Access Code Type

Access Code is stored in the PBX

Access Code is not stored in the PBX

Access Code is dialed

Access Code is not dialed

Host PBX Access Code

TRS ignores the code and checks the remaining digits.

Number dialed is not a CO line call, so TRS does not check the number.

TRS checks the entire number.

Special Carrier Access Code

TRS ignores the code and checks the remaining digits.

TRS checks the entire number.

•

ARS
If ARS is applied to a dialed number, TRS will check the user-dialed number, not the modified number produced by ARS. You do not need to program ARS-modified numbers in any of the TRS Tables. Additionally, when using ARS, TRS will ignore the Host PBX Access code or Special Carrier Access code.

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Dialing Digit Restriction during Conversation
TRS can also limit the number of digits which may be dialed by an extension user while the user is engaged on a received CO line call. If the number of dialed digits exceeds the limit, the line will be disconnected.

•

When one of the following features is used, the TRS level of the extension can be temporarily changed. If two or more of these features are used simultaneously (Dial Tone Transfer is used while the extension is locked, for example), the TRS level of the feature with the highest priority is applied for the duration of the call. The numbers below (1 through 4) indicate the priority of each feature, with 1 having the highest priority, and 4 having the lowest.

1)	Dial Tone Transfer ( 1.8.3 Dial Tone Transfer)
2)	TRS Override by System Speed Dialing
3)	Walking COS/Verified Code Entry ( 1.8.4 Walking COS, 1.8.5 Verified Code Entry)
4)	Extension Lock ( 1.8.2 Extension Lock)

Extension users can lock their telephones to prevent unauthorized use–useful for situations when extension users must leave their desks temporarily.
When Extension Lock is engaged, the extension's Toll Restriction (TRS) level (

1.8.1 Toll Restriction (TRS)) is temporarily changed to another level, thereby determining which CO line calls can be made from the locked extension by another user.
An extension personal identification number (PIN) is required to unlock a locked extension (

1.24.1 Extension Personal Identification Number (PIN)), however, anyone can engage Extension Lock, as no PIN is required.

This feature is also known as Electronic Station Lockout.

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This feature also restricts changing the Call Forwarding (FWD) destination. (

1.3.1.2 Call Forwarding (FWD))

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Remote Extension Lock
Allows an extension assigned as a manager to lock or unlock an extension. When a manager locks an extension remotely, the extension's user cannot unlock it. When a user locks an extension, a manager can override the lock and unlock the extension.
This feature is also known as Remote Station Lock Control.

•

TRS Level
The TRS level of a locked extension is assigned through system programming. (

TRS Level for Extension Lock [510]).

•

Other features can also temporarily change an extension's TRS level, similar to Extension Lock. If an extension is locked, the TRS level determined by the following features takes priority. The numbers below (1 through 3) indicate the priority of each feature, with 1 having the highest priority, and 3 having the lowest.

1)	Dial Tone Transfer ( 1.8.3 Dial Tone Transfer)
2)	TRS Override by System Speed Dialing ( 1.8.1 Toll Restriction (TRS))
3)	Walking COS/Verified Code Entry ( 1.8.4 Walking COS, 1.8.5 Verified Code Entry)

User Manual

Allows an extension assigned as a manager change the Toll Restriction (TRS) level (

1.8.1 Toll Restriction (TRS)) of an extension for the purpose of making a single CO line call. The extension user first calls a manager, who then presses the Toll Restriction button, giving the extension user a dial tone from which the normally unauthorized call can be made.

[Example]
A hotel guest calls the front desk and asks for the telephone's toll restriction to be lifted in order to make an international call.

Toll Restriction Button
A manager extension must store the TRS level granted by the Dial Tone Transfer beforehand, when assigning a flexible button as the Toll Restriction button.

•	Dial Tone Transfer is effective for only one CO line call.

User Manual

2.1.3 Dial Tone Transfer

Extension users can temporarily assign their own Class of Service (COS) to another extension, allowing them to make calls as if from their own telephones.
This feature is useful when a manager or supervisor needs to borrow another employee's telephone to make a call. The superior enters the Walking COS feature number followed by his or her extension number and extension personal identification number (PIN), then makes the call.
Other features can be accessed by Walking COS, such as DND Override (

1.3.1.3 Do Not Disturb (DND)) and Executive Busy Override (

1.7.2 Executive Busy Override). The same privileges and restrictions normally applied to a user are applied when using Walking COS.

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Walking COS is effective for only one CO line call or one operation at a time.

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When making a call with Walking COS:

a)	The extension number of the Walking COS user, not the borrowed extension, is logged by Station Message Detail Recording (SMDR). ( 1.23.1 Station Message Detail Recording (SMDR))
b)	The Walking COS user's Itemized Billing Code for ARS will be used.

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Walking COS through DISA
This feature is also available through Direct Inward System Access (DISA). (

1.15.6 Direct Inward System Access (DISA))

User Manual

1.2.6 Calling without Restrictions

A verified code is a code which is assigned its own Class of Service (COS), and therefore contains a Toll Restriction (TRS) level (

1.8.1 Toll Restriction (TRS)). Using a verified code, a PBX user can use any extension to make CO line calls with his or her own set of privileges and restrictions. You may think of Verified Code Entry as Walking COS for PBX users who do not have their own extensions.
Because a verified code user normally has no extension telephone, the verified code will be logged by Station Message Detail Recording (SMDR) for identification or accounting purposes when making a CO line call.
Other features can be accessed by Verified Code Entry, such as DND Override, Executive Busy Override, etc.
Each verified code can be assigned a user name, COS, verified code, personal identification number (PIN), and Itemized Billing Code for ARS. A verified code PIN is required to use Verified Code Entry.

[Programming Example: Verified Codes]

^*1

Verified Code [120]

^*2

Verified Code Name [121]

^*3

Verified Code Personal Identification Number (PIN) [122]

^*4

Verified Code COS Number [123]

WARNING
When a third party discovers the personal identification number (PIN) (verified code PIN/extension PIN) of the PBX, there will be a risk that they will make fraudulent phone calls using the telephone line, and the cost will be charged to your own account. In order to avoid this problem, we strongly recommend the following points:

a)	Carefully maintain the secrecy of the PIN.
b)	Specify a complicated PIN as long and random as you can make it.
c)	Change the PIN frequently.

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Verified Code Entry is effective for only one CO line call or one operation at a time.

•

When making a call with Verified Code Entry:

a)	The verified code, not the borrowed extension number, is logged by SMDR. ( 1.23.1 Station Message Detail Recording (SMDR)) It will appear as + [the verified code].
b)	The verified code user's Itemized Billing Code for ARS will be used.

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Verified Code PIN
A verified code PIN can also be assigned for each verified code through manager programming as well as through system programming.

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Verified Code Entry through DISA
This feature is also available through Direct Inward System Access (DISA). (

1.15.6 Direct Inward System Access (DISA))

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Verified Code PIN Lock
If the PIN is entered incorrectly three times, the line will be disconnected. If an incorrect PIN is entered a preprogrammed number of times, the PIN will be locked. Only an extension assigned as a manager can unlock a PIN, after which it will be reset.