Mitel Sx 50 Dpabx Instructions Guide

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Automatic Route Selection and Toll Control 
INDICATES LINES RENTED 
----- SYCARRIERCOMPANY 
FROM TELEPHONE COMPANIES 
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Figure 3-3 Typical OCC Arrangement 
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							4 
’ ARS FEATURES DESCRIPTION 
General 
4.1 The ARS feature is an integrated software package of the SX-50 system. When a 
trunk call is made, ARS automatically selects one of a programmed list of Trunk 
Routes, governed by route availability, cost (when more than one route exists) and 
the user’s toll restriction. The process is transparent to. the caller; the system 
automatically analyzes the dialed digits and modifies them to the requirements of the 
different routes. No special access codes are required. 
The complete ARS package provides the following: 
l Alternative Routing 
l Selective Routing by Class of Service 
l Least Cost Routing 
l Toll Control 
l Overlap Outpulsing 
l Expensive Route Warning 
l Return Dial Tone 
l ARS Callback. 
Alternative Routing 
4.2 Alternative Routing is the automatic selection of an alternative trunk Route when the 
first choice is busy. Routes (e.g., CO Trunks, Tie Trunks or WATS Trunks) are defined 
in the Route Table. Routes are accessed via Route Lists. Each list contains the first 
choice route number and up to three alternative route numbers. 
Selective Routing by Class of Service 
4.3 Each user is assigned to one of three Routing Classes of Service. The Routing Class 
of Service determines which routes the user can access and at what times during the 
day. See TOLL CONTROL. 
Every station capable of accessing an outgoing trunk is assigned a Routing Class of 
Service (RCS) in Station Programming. Inward Dial Trunks are assigned an RCS in 
Trunk Programming. The Attendant Console is assigned its RCS in the ARS part of 
System Options programming. 
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Least Cost Routing 
4.4 Least Cost Routing automatically selects the lowest cost route available for the time 
of day and call destination. This is achieved through Alternative Routing and 
.Time-of-Day Programming. 
Route Numbers appear in the Route List in the order in which the SX-50 system 
attempts to access the routes. (See ALTERNATIVE ROUTING). Ttie routes need only 
be programmed in ascending order of cost to achieve Least Cost Routing. 
Route lists are accessed via Time-of-Day Tables. The Time-of-Day Tables can be 
programmed for up to six daily time periods. Each table defines the Route List each 
RCS must use for each time period. A number of different Route Lists can be defined 
to reflect the variation in the relative cost of the routes at different times of day. 
Toll Control 
4.5 Toll Control is an integral part of the ARS feature package. With it, the customer can 
restrict user access to specific Trunk Routes and/or specific directory numbers. 
The ARS Routing Class of Service (RCS) of a station is analogous to its Class of 
Service (COS); it identifies the station as a member of a group of stations with specific 
trunk access and long-distance calling privileges. 
Access by each RCS to Route Lists is controlled in the Time-of-Day Table. Route List 
000 can be entered in the table to deny an RCS access to a particular location or 
directory number during a particular time period. Reorder tone will be returned to the 
restricted users. 
An RCS also can be denied access to particular Trunk Routes. The RCS to be restricted 
can be referred, via the Time-of-Day Tables, to different Route Lists than the others. 
These Route Lists will contain only the permitted Trunk Routes for that RCS. 
Trunks are seized only after the ARS process has determined the validity of the call. 
Because of this, false traffic,is not generated at the CO (or distant PBX) by aborted 
seizures. 
Overlap Outpulsing 
4.6 Overlap outpulsing minimizes the post-dialing delay the user experiences on a rotary 
dial trunk. (Post-dialing delay is the time between the completion of station dialing 
and the receipt of ringback). Outpulsing begins as soon as sufficient digits have been 
received to identify the route. The route is identified when the dialed digits uniquely 
match an entry in the Digit Comparison Table. The dialed digits are subject to digit 
modification prior to outpulsing. The system collects subsequent digits and outpulses 
them. 
Post-dialing delay is minimal when using a DTMF trunk. 
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ARS Features Description 
Expensive Route Warning Tone 
4.7 The Expensive Route Warning Tone is returned if only the most expensive route is 
available. If a SUPERSET’” 4 or SUPERSET 420 telephone is used, the message 
EXPENSIVE ROUTE appears on the LCD. To avoid incurring the additional cost, the 
user can hang up. Refer to the paragraphs covering the ARS Route List Table in Part 
5, ARS Tables in this Section for programming information. 
Return Dial Tone 
4.8 ARS Return Dial Tone is a programmable option (refer to-Part‘6 of this Section). 
When enabled, the SX-50 system returns dial tone after the Trunk Group Access 
Code is dialed. This feature is reassuring to users accustomed to key systems that 
return Central Office dial tone when an external call is made. 
ARS Callback 
4.9 When Automatic Route Selection indicates that all routes are busy, users can dial the 
callback code (6) within 10 seconds to invoke a callback. A SUPERSET user can 
press the CALLBACK softkey to invoke a callback. 
When one of the trunks in the ARS Route List becomes available, the SX-50 PABX 
notifies the user with Distinctive Callback Ringing (see Section 9104-091-l 05-NA, 
DISTINCTIVE CALLBACK RINGING for more information). In addition to ringing, the 
CALLBACK message is displayed for SUPERSET users. Once the SUPERSET user 
answers the ARS Callback, the originally dialed destination number is shown on the 
display. 
The system automatically redials the destination number after the user answers the 
callback. Note that ARS Callbacks can be placed on routes only, not on busy or no 
answer destinations. 
l A maximum of one ARS Callback is allowed per extension at any given time. Submit- 
ting a new Callback cancels the previous one. 
l If more than one callback is active on a given route, callbacks are queued and serv- 
iced on a first in, first out basis. 
l To cancel Callbacks, dial the Clear All Features access code (default is 444). 
l If a Callback is activated, the callback utilizes the least expensive route. 
l ARS Callback is available only to those users with Automatic Callback enabled in 
their Class of Service (Commands 121 - 129, Register 3, fields b and j). 
. If ARS programming is modified while ARS Callbacks are in progress, incorrect rout- 
ing of the call may occur. 
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							5 
’ ARS TABLES 
General 
5.1 The ARS package contains a network of tables that control the routing of trunk calls 
and access to trunk routes. There are five ARS tables. They are, in order of 
programming: 
l Digit Comparison Table (800 entries) 
l Time-of-Day List Table (45 entries, 6 time periods each) 
l Route List Table (200 entries) 
l Route Table (100 entries) 
l Digit Modification Table (100 entries) 
Each of the above tables refers to an entry in the next table. The flow of information 
through the ARS system is shown in Figure 5-l. 
DIALED DIGITS -71 
ARS ROUTE LIST 
TABLE 
Figure 5-l ARS Table Hierarchy 
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ARS Digit Comparison Table (Command 700) 
Entry Number Time-of-Day List Comparison Digit String 
(001 + 800) (01 + 45) Field Field 
Fields a - c Fields d & e f 
Fields g -+ I m 
001 03 
[ 95922122 1 
002 45 
1 91416 1 
003 05 
[ 95557964 1 
. . . . . 
[ . . . . . . . 
1 
800 
[ 1 
Note: The display shows Fields g - I. By scrolling, it can display up to 32 digits. 
There is a maximum of 800 entries. The Register Number is the Entry Number. Each 
entry pairs a Time-of-Day List Number and a Comparison Digit String. When the dialed 
digit string .matches one of the Comparison Digit Strings, the processing proceeds to 
the corresponding Time-of-Day List entry. If the dialed digit string does not match any 
of the Comparison Digit Strings, ARS does not handle the call; the call is routed 
according to the Trunk Group Access code the user dialed. 
The fields which comprise the Digit Comparison Table are described below. 
Entry Number: This is the Register Number and is not programmable. Valid entries are 
001 to 800. 
Time-of-Day List Number: This field links to the Command Numbers of the 
Time-of-Day Table. Valid entries are 01 to 45. 
Comparison Digit String: This field lists the digits the system compares against the 
dialed digits prior to outpulsing. The digit string must begin with the Trunk Group Access 
Code. 
Associated with this form are softkeys that perform special functions: 
l VIEW: Pressing the VIEW softkey scrolls the digit string display one digit to the left. 
By repeated presses of this key, the user can view the entire 32-digit string. 
l DELETE: Pressing the DELETE softkey deletes the digit string digits from the cur- 
rent position to the end of the digit string. 
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							ARS Tables 
ARS Time-of-Day Table (Commands 701 to 745) 
Commands 701 - 745 correspond to Time-of-Day List Numbers 01 - 45. These are 
referenced from the Digit Comparison Table. 
TimePeriod 
(1 - 
6) 
Field a 
1 
2 
3 
4 
5 
6 
Time 
(Hours) 
(00 - 
23) 
Fields b,c 
01 
08 
‘9 
18 
20 
00 Time Route List Numbers 
(Minutes) - 
(00 + 59) RCSl Rix 
2 RCS 3 
Fields d,e Fields fgh Fields ijk 
Fields Imn 
00 001 
003 005 
00 002 -003. 002 
30 002 003 002 
00 000 003 004 
00 000 003 004 
00 000 000 000 
The fields which comprise the Time-of-Day Table are as follows: _ 
Time Period: This nonprogrammable field represents the six possible time periods in 
1 day. 
Time 
(Hours and Minutes): These fields list the starting time for each Time Period. 
Valid entries are 00 to 23 and 00 to 59 for the Hours and Minutes respectively. A single 
entry indicates one time period for the day. Also, the system automatically forms a time 
period from the last entry to the first entry. 
Route List Numbers: These fields list the Route List Numbers, which link this table to. 
the next one in the hierarchy; the ARS Route List Table. Each field grouping represents 
the available Route List Numbers for each Routing Class of Service (RCS). Valid 
entries are 001 to 200 and a Route List Number defined as 000 indicates that access 
is denied. 
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ARS Route List Table (Command 750) 
Route Selections 
Route List 1 st Choice 
Number 
Route No. 
Fields a,b,c 
Fields d,e,f 
001 001 
2nd Choice 
Route No. 
Fields g,h,i 
002 3rd Choice 4th Choice 
Route No. 
Route No. 
Fields j,k,l Fields m,n,o 
000 
000 
002 
001 000 000 000 
003 004 003 005 000 
. . . _ 
. . . . . . . . . 
. . . 
I I I I 
I 200 
000 000 000 
000 
This table contains a maximum of 200 one-line entries, each of which lists up to four 
Route Numbers. Valid entries are 001 to 100 and an entry of 000 indicates a 
nonprogrammed route. The Route Numbers are listed in the order in which they are to 
be tried; i.e., least expensive route to the most expensive route. The Expensive Route 
Warning option (enabled in Command 100, System Options, Register 13), activates 
when the fourth route is selected. This feature can be used even when there are fewer 
‘than four routes programmed. The expensive route is placed in the fourth column. 
Nonprogrammed routes (000 entries) in any of the other columns are ignored. 
Route 
Number Trunk Group Number (1 - 6) DMT Entry Number (001 - 100) Toll Calls 
0 = Not Programmed 000 = Not Programmed 0 = Non-Toll 
Fields a,b,c 
Field d Fields e,f,g Field h 
001 
0 000 
0 
002 1 003 
0 
003 
1 004 
0 
004 
1 089 
0 
005 
2 057 
0 
i 
J i 
i 
100 
There is a maximum of 100 entries. The Register Number is the Route Number, which 
is referenced from the Route List Table. A route is described by a Trunk Group and a 
Digit Modification Table Entry Number. 
The fields which comprise the Route table are described below. 
Route (Register) Numbers: This nonprogrammable field lists the Route Number 
which is referenced from the Route List Table. 
Trunk Group Number: This field lists the selected Trunk Group for the Route. Valid 
entries are 1 to 6; 0 indicates a nonprogrammed route. 
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							ARS Tables 
Digit Modification Table Entry: These fields list the DMT Entry Number for the Route. 
Valid entries are 001 to 100. An entry of 000 indicates a nonprogrammed route. 
Toll Calls: This field is used by the Account Code Bypass feature to determine whether 
a call is a toll or non-toll call. Valid entries are 0 (Non-Toll Calls) or 1 (Toll Calls). Default 
is 0. 
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