ZETRON 748, Technical Manual

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Operation
36 025-9368H
ENHANCED TOLL RESTRICTION
The Model 748 incorporates toll restrictions at two levels, system wide and on a per user (radio)
basis. At the system level a the rules by which the dialed digits are monitored is set. At the user
(radio) level, the degree to which those restrictions apply to a specific user is set. You should
become familiar with how toll calls are determined by the phone company in the area where the
interconnect will be installed. You will need this knowledge to help you determine what method of
toll restriction best fits your needs.
At the system level there are three different Toll restriction plans supported, (“NA Original”, “NA
Standard” and “Universal”). The first two (“NA Original” and “NA Standard”) directly support
dialing plans as defined in North America. A third plan (“Universal”) is designed to support
installations outside of North America, or where additional customization is desired. Each plan
provides a set of rules used in determining the types of calls a mobile can place.
In addition to the defined toll restriction plans, an Emergency Prefix number and two Toll free prefix
numbers can be defined. These special numbers allow calls (999 or 0800) to be placed regardless of
the degree of restriction for that user (radio). Support for PBX connections by making a distinction
between inside and outside calls (toll restricts apply to outside calls only) is also provided.
The two North American plans (“NA Original” and “NA Standard”) are similar in function but differ
in implementation. Both monitor the digits as they are dialed by the mobile, looking for 1+ and 0+
toll calls, 7 digit toll calls (non 1+) and 10 digit local calls. Based on the digits received from the
mobile, the Model 748 knows how many digits are required to place the phone call, and when to
enable mobile to phone audio. This eliminates the need for timers or termination digits at the end of
dialing.
The “Universal” plan allows the system operator to define or customize the toll restriction rules to fit
the local dialing plan. It works by using two user defined tables of prefixes. Each table can have up
to 10 entries. Each entry can be 2 to 4 digits long and include wild cards (“*”) anywhere. The digits
are monitored as they are dialed by the mobile. Once it receives the minimum required digits, it then
scans the tables for a matching prefix (just like a wild ANI search). The call is then either allowed or
disallowed based on the result of the search. Minimum (default = 4) and Maximum (default = 15)
number of regenerated digits also defined. Timers and/or termination digit (“*”) is used in
determining when to terminate regenerated dialing and enable mobile to phone audio.
At the user (radio) level, Toll restrict type has 8 degrees or types of restriction. Four are common to
all plans and four are plan specific. “None thru”, “None blap”, “AutoDial” and “PBX inside” are
common to all plans. The “thru” and “blap” qualifiers indicate if DTMF is passed through after
dropping out of regeneration. “AutoDial” disables all manual dialing, “PBX inside” limits calls to
internal only with thru enabled. Under North American plans, “0+” and “Local” allow calling card
calls and/or local call only. Under the Universal plan, “TblA” restricts calls to the Allow table and
“TblB” restricts calls in the Restrict table.