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Call Baring (Toll Restriction)
About Call Barring
The Call Barring (or Toll Restriction) feature lets you bar specifi c extensions from calling certain
types of phone numbers (or prefi xes). This feature is most commonly used to bar toll calls, i.e.
long-distance, international, and/or 1-900 number calls. If this is not a concern in your offi ce,
there is no need to program this feature.
When Call Barring is operating, the system consults a Call Barring Disallow Table of phone
number (or prefi xes) each time a call is placed. It scans the table as each digit is entered. If a match
with the Disallow Table is found, the call is denied. If no match is found, the call is permitted.
Most commonly a Disallow Table will include the prefi xes “1” (long-distance calls) and “011”
(overseas calls).
Exception to the Disallow Table are needed to allow users to call “1-800” numbers when all
other numbers beginning with “1” are barred. In this case, you will need to create an Allow Table
and enter the “1-800” prefi x. Similarly, you can enter any other “exceptions” to numbers barred
such as out of town suppliers or clients. Because the system searches the Allow Table(s) fi rst, the
Disallow Table will not bar the call.
The system can store up to three call barring Allow Tables and three Disallow Tables. For most
offi ces, one Disallow Table, or one per call group, is suffi cient. But if you want to have a wide
variety of restriction options, you can use up to three Disallow Tables and three Allow Tables.
Call Barring (Toll Restriction) Details
As an extension dials each digit, the IPS scans the complete sequence of digits dialed to check if
the extension is barred from dialing the sequence. If the extension is restricted from dialing the
number, the outside line is immediately released and the person at the extension will hear the fast
error tone.
A special case can arise if an outgoing call is made from an unrestricted extension and then
transferred to a restricted extension. If the extension were to dial another digit, the unit would
normally examine the complete sequence of digits dialed and determine that the extension is not
allowed to make the call. The extension would be disconnected from the outside line. A special
provision has been made to the operation of the IPS such that it will not check the call barring
restrictions on a transferred call, unless and until the extension fl ashes, in order to place the call
on hold or transfer the call. This allows the caller to enter additional digits (perhaps to a remote
Voice Mail unit) without getting disconnected from the outside line.
Call Baring (Toll Restriction)
Содержание IPS 308
Страница 8: ...1 Introduction Chapter 1 Of IPS System...
Страница 11: ...5 Installation Chapter 2 Guide...
Страница 28: ...23 Functions Of Chapter 3 IPS System...
Страница 107: ...103 IPS System Used With Chapter 4 Ordinary Telephones...
Страница 132: ...129 IPS System Used With Chapter 5 IVT 16 Key Telephone...