Panasonic DBS 576 Technical Manual

							Section 700 - Operation
576-50-700 DBS 576 (USA) issued September 2001 A-3
Leading Digits Table
The leading digits table considers the initial dialed digits in determining the restriction TRS level. 
Up to 10 digits can be considered. The digits may be any number 0, 1-9. In addition a wild card (*) may be used 
to occupy any digit position. For instance *11 would consider the numbers 011, 111, 211, 311, 411, 511, 611, 
711, 811, 911. 
When considering the prefix string, the system will always consider the longest exact match first. For instance, 
the prefix string 404 match would be followed before 40.
A wild card is always considered last. For instance if 911 were dialed and both 911 and *11 were prefix strings, 
the 911 would be followed.
If additional digits need to be considered, a prefix ID can be used to cross-reference the Analyze Digits Table.
Once the system determines an exact match, the system will determine from this table the  number of digits that 
are to be  dialed and the restriction TRS level. (There are two other entries in the Leading Digits Table - Route 
Type and Route Number. These are not used for TRS-only operation.)
Note that TRS operation is a match then restrict feature. If there is no match, there is no restriction. Make 
certain that there is a match. As a catch all, use the * wild card.
Note:With TRS is used in a system behind another PBX, the PBX access code does not have to be processed 
by TRS 
Analyze Digits Table
If the Leading Digits Table contains a Prefix ID, the system will consider all appearances of this Prefix ID to 
look for an exact match. Up to 8 digits are considered (in addition to the prefix dial digits).
Once the system determines an exact match, the system determines from this table the number of digits that can 
are expected to be dialed and the restriction TRS level. (There are two other entries in the Analyze Digits Table 
- Route Type and Route Number. There are not used for TRS-only operation.)
ARS/TRS Features
When ARS is used in the DBS 576, TRS also operates. 
TRS Class Features
These are the same features as for TRS (see above).  
 TRS Class - ARS Routing
TRS Level
For each of the 50 TRS classes, a TRS Level of 0-9 may be assigned. (This is not done on a Trunk group basis 
since the ARS system determines the trunk group used.)  
When a call is originated, this TRS value is used to determine the originator’s TRS level. From the dialed 
digits, a restriction TRS level (0-8) is determined. If the originator’s TRS level does not exceed the restriction 
TRS level, the call is restricted. The higher the originator’s TRS level, the less the restriction. If the originator’s 
TRS level is 0, no outside calls are allowed. If the originator’s TRS level is 9, all outside calls are allowed since 
this will always exceed the restriction TRS value (maximum of 8). 
						

							A-4 DBS 576 (USA) issued September 2001 576-50-700
Section 700 - Operation
ARS Level
An ARS level is also assigned to each of the 50 TRS classes. This originator’s ARS value is used to determine 
if the caller can proceed to use a particular priority route based on the associated ARS requirement in the Route 
List (described later). The originator’s ARS value may be 0-9 where the higher number allows more calling 
access.
Queuing Point
The Route List provides up to 5 route possibilities for handling a call. Each route is considered in a sequential 
order. When the Queuing Point is set to operate, the system will search all previously considered routes and 
then the current route for an available trunk for the Queuing time period.  
Dialing Analysis
When ARS is active, the dialed digits can be analyzed to determine if the call is toll restricted and what type of 
routing the call will follow. 
Leading Digits Table
The leading digits table considers the initial dialed digits in determining the restriction TRS level and ARS 
routing. 
Up to 10 digits can be considered. The digits may be any number 0, 1-9. In addition a wild card (*) may be used 
to occupy any digit position. For instance *11 would consider the numbers 011, 111, 211, 311, 411, 511, 611, 
711, 811, 911. 
When considering the prefix string, the system  considers the longest exact match first. For instance, the prefix 
string 404 match would be followed before 40.
A wild card is always considered last. For instance if 911 were dialed and both 911 and *11 were prefix strings, 
the 911 would be followed.
If additional digits need to be considered, a prefix ID can be used to cross-reference the Analyze Digits Table.
Once the system determines an exact match, the system will determine from this table the  number of digits that 
are expected to be dialed and the restriction TRS level. 
If the TRS level allows the call to proceed, then the route type and its associated pattern number (entry index 
number) are followed. There are three possible route types; the Route Table, the Route List Table and the Time 
List Table. 
Analyze Digits Table
If the Leading Digits Table contains a Prefix ID, the system considers all appearances of this Prefix ID to look 
for an exact match. Up to 8 digits are considered (in addition to the prefix dial digits).
Once the system determines an exact match, the system determines from this table the number of digits 
expected to be dialed and the restriction TRS level.
If the TRS level allows the call to proceed, then the route type and its associated pattern number (entry index 
number) are followed. There are three possible route types; the Route Table, the Route List Table and the Time 
List Table.  
						

							Section 700 - Operation
576-50-700 DBS 576 (USA) issued September 2001 A-5
Time List Table
Time List Table is used when the time of day, the day of week or the date affects the desired route. The Time 
List Table allows up to 50 patterns to be entered. Each pattern may specify up to five Route List patterns to 
used based on the current time of day.
Up to four Time List tables may be used. The referenced time list table is determined by the Special Day Table 
or the Day of Week Table. This is useful when rates change for certain days (such as weekend rates versus 
weekday rates).
Route List Table
The Route List Table is used when there are multiple route possibilities. Up to 5 possible route table patterns 
may be considered in sequential priority when attempting to find an available trunk. Before a route is tried, the 
system compares the route ARS to the originator’s ARS level. If the route ARS exceeds the originator’s ARS, 
the call processing will stop and the caller will receive busy tone.
When the call is first presented, the first priority route is tried. If there is no available trunk in the first route and 
queuing point is not enabled the system continues to the next priority route, compares the ARS levels and if 
acceptable checks for an available trunk. If no trunk is available, it will continue to the next priority trunk, and 
so forth until all routes have been attempted. 
If an available trunk is found and warning tone is enable, the system will first issue a warning tone to the caller 
to allow the caller the opportunity to hang up before using a more expensive trunk.
If the queuing point is enabled, the system will wait for an available trunk (beginning with the first priority 
trunk) until the queuing point timer expires before moving to the next possible route.
Route Table
The Route Table provides a simple trunk group selection and selects any digit dialing modification needed. 
This table is directly referenced when there is only one route to use. It is also indirectly reference from the 
Route List Table.
Digit Modify Table
Once a route is selected, the actual dialed digits can be changed based on the Digit Modify Table. Digits can be 
deleted from the beginning of the number (such as removing an unneeded area code), digits can be added to the 
beginning of the number (such as adding an area code or equal access number) and digits can be added to the 
end of a number.
TRS Configuration and Operation
This section provides the following:
• An overview of the TRS operation.
• An example TRS configuration - This is a simple example intended to introduce TRS planning and 
implementation. Example worksheets are included.
• Worksheets for planning and implementing a TRS plan.  
						

							A-6 DBS 576 (USA) issued September 2001 576-50-700
Section 700 - Operation
TRS Programming/Operation Overview
The purpose of TRS is to restrict outside call origination based on the number dialed and the originator.
As shown in Figure A-4 TRS Operation (Non-ARS) at the end of this appendix, up to 50 TRS Classes settings 
are assigned. When a call is originated, several general settings for the originator are always considered:
•Digit Restriction - This is the maximum number of digits that can be dialed.
•Incoming Dialing Restriction - If this is enabled, an outside call cannot be originated during an 
incoming call.
•Outgoing SSD Dialing Restriction - This determines if SSD dialing is allowed or not.
•Star (*) and Pound (#) Dialing Restriction - This determines if the * and # digits can be outdialed.
When a call is originated, the system determines the TRS class for the originator from either the Trunk Class 
Assignments or the Extension Class Assignments. It then determines the originator TRS level for the trunk 
group selected.
When the call is dialed, the system collects the digits and compares the leading digits to the leading digits table 
entry. The system will look for the longest available exact match. A * may be entered as a wild card for any 
digit position. 
If an exact match is found, the system will look to see if there is a Prefix ID. If so, it will jump to the analyze 
digits table. If not, the system will compare the entered TRS Restriction value to the call originator’s assigned 
TRS level. If the originator’s TRS level is not greater than the Restriction TRS level, the call is denied. 
Otherwise, the call is allowed to proceed. 
						

							Section 700 - Operation
576-50-700 DBS 576 (USA) issued September 2001 A-7
Figure A-1.  TRS Flowchart
Extension or trunk
accesses trunk
User dials digit
Wait for user to
dial additional digit
System outdials digit(s)
on trunk
System collects
additional digit
and outdials System checks Restriction
TRS Level in Analyze Digit
TableSystem checks Restriction
TRS Level in Leading Digit
TableSystem checks originating
ext. or trunk TRS Class
System compares
dialed digit(s) to
Leading Digits
Table Prefix Dial
entries
System compares
additional digit(s) to
Analyze Digits Table
Prefix Dial entries
Is Origination TRS
Level greater than
Restriction TRS Level?Is there a Prefix ID
entry in Leading
Digits Table?System checks class
assignment for TRS level
for this trunk group
Origination
TRS Level
Are additional
digits required
for match?
Are additional
digits required
for match?
Has the Max. # of
Following Digits been
outdialed? Ye s
Ye s
No exact
match
No Match
Match Match
Ye sNo
Allow call
Allow call
Restrict callNo
No
No
NoYe s 
						

							A-8 DBS 576 (USA) issued September 2001 576-50-700
Section 700 - Operation
If the analyze digits table is referenced by a Prefix ID, the system will consider at all entries with the Prefix ID 
and analyze any additional digits dialed. The system will look for the longest exact match. If there is an exact 
match, the system compares the entered TRS Restriction value to the call originator’s assigned TRS level. If the 
Restriction value is equal to or greater than the originator’s TRS level, the call is denied. Otherwise, the call is 
allowed to proceed.
Example TRS Configuration
As an example of setting up TRS, assume that XYZ Department Store is using the DBS 576 PBX.
Situation 
This example installation has the following considerations:
• Only one tenant (one MCO tenant group operation)
• 75 retail floor store phones
•  restricted to local telephone use only except for 1800, 1888 and calls to a city where a sister 
store and many suppliers are located
•  restrict special calling numbers (976, 1900, outside operator, etc.)
•  public emergency numbers always allowed
• 40 general office phones
•  long distance allowed during day mode
•  restrict special calling numbers (976, 1900, outside operator, etc.)
•  public emergency numbers always allowed
• 10 purchaser/buyer telephones
•  no time restriction
•  restrict special calling numbers (976, 1900, outside operator, etc.)
•  public emergency numbers always allowed
• 25 executive office telephones
•  no time restriction
•  no calling restrictions
• 2 attendant group phones
•  no restrictions during the day
•  local calls only at night to prevent abuse
• 7 warehouse phones
•  extension and public emergency numbers only
• Trunks 1-24 are in Trunk Group 1 and are to the local CO (exchange line) for local calls. In addition, 
long distance carriers are accessed using these trunks. 
						

							Section 700 - Operation
576-50-700 DBS 576 (USA) issued September 2001 A-9
Implementation
The configuration of this system is described in the following steps: 
1.  The system needs are listed in Table 1, “Example - User Needs Worksheet,” on page 10.
Most of the information is straight forward. The Day TRS and Night TRS classes are determined by 
assigning consecutive Class numbers to each unique calling need. When a duplicate need is encountered, 
the same class number is assigned.
The system trunk equipment is listed in Table 2, “Example - MCO Tenant/Trunk Groups Worksheet,” on 
page 11. 
						

							A-10 DBS 576 (USA) issued September 2001 576-50-700
Section 700 - Operation
Table A-1.   Example - User Needs Worksheet
Tenant Name XYZ Department Stores     Tenant #   1   (1-72)
User Type
(office,  
executive, lobby)User Extension 
(or Trunk) Ports 
(BSSC) and 
NumbersDay Calling Needs
(Long Distance, 411, 
specific number, etc.)Night Calling Needs
(Long Distance, 411, 
specific number, etc.)Day TRS 
Classa
(1-50)
a. After all user data has been entered, then assign class numbers. Night TRS 
Class
a 
(1-50)
Executive 1101-1125 No Restrictions No Restrictions 1 1
Buyers 1166 - 1175 No Restrictions except 
special numbers (976, 1900, 
411, operator access, collect 
calls, etc.)No Restrictions except 
special numbers (976, 1900, 
411, operator access, collect 
calls, etc.)22
General Office 1126-1165 Long Distance Allowed
No special numbers (976, 
1900, 411, operator access, 
collect calls, etc.)Local calls only
No special numbers (976, 
1900, 411, operator access, 
collect calls, etc.)
Allowed to call City B34
Attendant Group 1176-1177 No Restriction Local calls only
No special numbers (976, 
1900, 411, operator access, 
collect calls, etc.)
Allowed to call City B14
Retail floor 1178-1253 Local calls only
No special numbers (976, 
1900, 411, operator access, 
collect calls, etc.)
Allowed to call City BLocal calls only
No special numbers (976, 
1900, 411, operator access, 
collect calls, etc.)
Allowed to call City B44
Warehouse 1254-1260 Extension calling and 
emergency calling onlyExtension calling and 
emergency calling only55 
						

							Section 700 - Operation
576-50-700 DBS 576 (USA) issued September 2001 A-11
Table A-2.   Example -  MCO Tenant/Trunk Groups Worksheet
Tenant Name    XYZ Department Stores       Tenant Number    1   
Trunk Group 
Number (0-99)Description
(Two-Way CO LS, Tie Line, FX, 
etc.)Trunks in Trunk Group (Number/BSSC) Usage (MCO1 - Dial “9”, 
MCO2 - dial “81”, Direct 
Access Only, etc.)
 
1 Two-Way CO (Exchange Line) 
Loop Start1-24 MCO 1 - Dial “9” 
						

							A-12 DBS 576 (USA) issued September 2001 576-50-700
Section 700 - Operation
2.  From the User Needs and Tenant Trunk Groups Worksheets, TRS levels are determined. This list is 
created by reviewing the different calling needs and assigning the most restrictions to the lowest TRS level 
and working up to the least restriction level.
Table A-3.   Example - Origination TRS Level Plan
Originator 
TRS LevelTRS Level Properties
9
No Restriction
8
7
6
5
4 All long distance calls allowed except special numbers (976, 1900, 411, 
operator access, collect calls, etc.)
Allow public emergency numbers
3 North America long distance calls allowed except special numbers (976, 
1900, 411, operator access, collect calls, etc.)
Allow public emergency numbers
2 Local Calls Allowed
No long distance or special numbers (976, 1900, 411, operator access, 
collect calls, etc.)
Allow calls to (205) 555-XXXX, (205) 556-XXXX, and (205) 557-XXXX 
Allow public emergency numbers
1
Public emergency numbers only
0
No Outside Calling/PBX Centrex & Extension only