Black Box FX160A manual Call Barring Toll Restriction, About Call Barring

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PHONE LINE MANAGER 16 X 4

14.Call Barring (Toll Restriction)

14.1About Call Barring

The Call Barring (or Toll Restriction) feature lets you bar specific extensions from calling certain types of phone numbers (or prefixes). This feature is most commonly used to bar toll calls, (long-distance, international, and/or 1-900 number calls). If this is not a concern in your office, there is no need to program this feature.

When Call Barring is operating, the system consults a Call Barring Disallow Table of phone numbers (or prefixes) 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 prefixes “1” (long-distance calls) and “011” (overseas calls).

Exceptions 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” prefix. 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) first, the Disallow Table will not bar the call.

Creating toll restrictions requires two steps. First you will need to create one or more Disallow and Allow Tables. Then you will need to assign individual extensions to the appropriate table(s).

The system can store up to three call-barring Allow Tables and three Disallow Tables. For most offices, one Disallow Table, or one per call group, is sufficient. But if you want to have a wide variety of restriction options, you can use up to three Disallow Tables and three Allow Tables.

14.2 Call-Barring (Toll-Restriction) Details

As an extension dials each digit, the Phone Line Manager 16 x 4 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 Phone Line Manager 16 x 4 such that the it will not check the call barring restrictions on a transferred call unless and until the extension flashes 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.

A second special case can arise if the outside lines are configured to allow a switchhook (flash) to be sent to the outside line. A switchhook to an outside line may be needed to affect certain features like Call Waiting. However, some Central Office switches may give a new dial tone in response to the switchhook. In this case, the caller could possibly dial an allowed number, send the switchhook, and then dial a restricted number. The Phone Line Manager 16 x 4 is only able to examine the digits dialed starting at the beginning of the sequence and the call would not be barred. If this is a concern, you may want to prohibit the switchhook from being sent to an outside line (see Section 6.3).

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Contents Phone Line Manager 16 x Mexicanas Electrical Safety Statement Phone Line Manager 16 X Contents Contents Phone Line Manager 16 X Specifications Introduction Preparing to Program Choosing the Programming Mode-Automatic or PasswordDesignate an Extension for System Manager Programming Tips Factory-Default SettingsBasic Features Advanced System FeaturesExtension Features for all extensions Outside Line FeaturesWhen You Reset the System to Default Values Entering the Programming-Mode PasswordChanging the Programming-Mode Password Resetting the System to Default ValuesWhat type of phone will be connected to the extension? Configuring the ExtensionsChoices When Programming the Extensions Which special features do you want to allow the extension?Programming the Extensions Automatic Outside Door-Phone-Operation Details To require a * to be entered before a 4 or a To disable the Call Follow Me functionCall Forwarding/Call Follow Me Require Star Key Before User ProgrammingIntroduction Central Office Lines Incoming CallsChoices in Handling Incoming Calls Defining the Standard Incoming Line Extension Numbers Entering the Private Incoming Lists Day Night Central Office Lines Programming Choices in Configuring Central Office CO LinesProgramming Outside Lines Dialing 9 to Access Outside LinesDo you want to dial 9 or 0 to access an outside line ? To access an outside line by dialingEnter Enter Line # Code Fax Extn 1xx About Disa and Direct Caller Access to ExtensionsAuto-Attendant Disa Recording a Voice AnnouncementEnabling the Voice Announcement Setting the Length of the Disa Input TimeWhat Happens after the Disa Entry To ring the fax extension if there is No Disa entry What Happens If There is No Disa EntryMultiple Fax Extensions To ring the Operator if there is No Disa entryDefining Outgoing Call Groups About Outgoing Call GroupsAssigning Extensions to an Outgoing Call Group Enable Direct Outward Station Access Dosa Direct Outward Station Access DosaEntering the Dosa Password Hunt Groups To Enable the Use of the Four Different Hunt GroupsTo Enable Hunt Groups To Disable Hunt GroupsThen dial 00 00 00 Then dial 01 03 04Then dial 05 06 06 Then dial 12 13 14To disable automatic switching between modes Automatic Day/Night Mode SwitchingAutomatic Day/Night Mode Switching Times To enable automatic switching between modesPhone Line Manager 16 X Tone- or Pulse-Dialing Details Central Office Lines Advanced TopicsTo Disable Clear Forward Detection To Enable Polarity Reversal DetectionTo Disable Polarity Reversal Detection To Enable Clear Forward DetectionMetering Pulse Frequency Metering Pulse DetectionCaller ID Phone Line Manager 16 X Exclusive Answering Machine Privilege Rollover Extensions Advanced TopicsRollover of Unattached Calls Rollover of Intercom CallsTo transfer unattached calls to the Operator Simplified Voice-Mail Interface Voice-Mail Unit InterfaceMSG Button on a Key Phone About Call Barring Call Barring Toll RestrictionCall-Barring Toll-Restriction Details Sample Disallow Table Filling the Call-Barring Allow and Disallow TablesTo fill a Call-Barring Allow or Disallow Table Assigning Extensions to Tables Sample Allow TableRestrict Calls at Night Password to Override Call BarringTo enter a speed-dial number Assigning Speed-Dial NumbersDial-Tone Detection Clear Speed-Dialing and Call-Barring TablesSystem Clock Date and Time Setting the System ClockTo display the time in the 12-hour mode To display the time in the 24-hour modeOutgoing-Call Records and Histories Automatic Call-History Retrieval Program Output the Call History After Each Outgoing CallFormats for the Call-History Records Connection to a Computer or a Printer Interfacing the Phone Line Manager 16 x 4 to a Computer 18.1 RS-232C Port-Choosing the Operating ModeTo enable the System Mode of the RS-232C Port To enable the Features Mode of the RS-232C PortPhone Line Manager 16 x 4 Configuration Program To report incoming Disa digits to the CAT Application To enable the normal mode of Disa operationComputer Aided Telephony CAT Software Report Disa Digits to the CAT ApplicationAbout System Timing Parameters Delay After Each RS-232C CharacterDelay After Each RS232C Line System Timing ParametersReminder Feature Timing Switchhook Flash TimingPulse-Dialing Timing Outside Line Guard TimeTone Dtmf Dialing Timing Switchhook Timing to Outside Line Rollover After Call to Extension Rollover on Standard Incoming Calls TimingOn Hook Time Multiple Ringing Time Speed-Dialing Delay TimeParked Calls Timing Park Drive Lawrence, PA 15055-1018 724-746-5500 Fax
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