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Section 700 - Operation Appendix A. ARS and TRS Operation
576-13-700 DBS 576 (USA), Revised 6/11/98 309
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 looks 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 route
type and associated pattern # are determined and the system jumps there.
Three route types are available. These include the Routing Table (a direct trunk group selection), the Route List
Table (a route priority consideration), and the Time List Table (selects a route list based on date, day of the
week, and time of day).
The simplest call routing method is the Route Table. This determines a trunk group to use and, if programmed,
a digits modification pattern to use. Up to 24 prefix digits may be deleted, up to 10 prefix digits can be added
and up to 10 suffix digits may be added.
If multiple trunk groups are to be considered for the call, the Route List Table is used. This table consists of up
to 5 possible routes and an associated ARS level required. If the ARS level for the first priority route is equal to
or less than the ARS level associated with the call originator, then the listed route will be tried. If the first listed
Route Table trunk group has no available trunks busy, then the next priority route is considered. If Queuing
Point is set to continue, then the first priority trunks are retried first before trying to a next priority route. If the
Warning Tone is enabled, then before a call is connected to a found trunk, a warning tone is sounded to allow
the caller to hang up before the more expensive trunks are used.
If time of day, day of week and day of the year need be considered in routing the call, then the Time List Table
should be referenced first. The Time List Table allows up to 50 patterns to be entered. Each pattern can specify
up to 5 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).
Example ARS Configuration
As an example of setting up ARS, assume that Atlanta based XYZ Department Store is using the DBS 576
PBX.
Situation
This example installation has the following considerations:
• 75 retail floor store phones
• restricted to local telephone use only except for 1800, 1888 and calls to Birmingham, Alabama
where a sister store and many suppliers are located
• restrict special calling numbers (976, 1900, outside operator, etc.)
• 911 always allowed
• 40 general office phones
• long distance allowed during day mode
• restrict special calling numbers (976, 1900, outside operator, etc.)
• 911 always allowed
• 10 purchaser/buyer telephones
• no time restriction