Automatic Routing and PBX System Integration

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The FaxPress Enterprise Redundant is easily integrated with most PBXs, providing automatic delivery of incoming faxes to recipients. To enable automatic inbound fax routing, FaxPress Enterprise Redundant user mailboxes must be assigned mailbox IDs that map recipient fax numbers to the corresponding FaxPress Enterprise Redundant mailbox.

Mailbox IDs will consist of up to seven digits, with three or four digits the most common. The mailbox ID is determined by the number of DNIS digits the digital line or PBX is passing to the Enterprise Redundant. If you don’t know how many digits are being passed, and are not able to acquire this information from the phone company, use the Enterprise Redundant’s dtmf.log file described in Determining DNIS Digit String/Mailbox ID Information to determine the number of digits being passed to the Enterprise Redundant.

The Enterprise Redundant’s Routing Type settings allow you to configure the FaxPress Enterprise Redundant to extract only the necessary DNIS digits identifying the users’ mailbox IDs from the complete string passed by the PBX.

Configuration Requirements

To configure the FaxPress Enterprise Redundant’s Routing Type settings (see Select the Routing Type tab.) for integration with your PBX system and for automatic routing, you’ll need to know the complete digit string passed by the PBX to the Enterprise Redundant, and where in the string the mailbox-identifying DNIS digits begin and end. If necessary, use the Determining DNIS Digit String/Mailbox ID Information to determine the number of digits the PBX system is passing to the FaxPress Enterprise Redundant.

For automatic routing and PBX integration, DNIS digit string information must be entered in the Enterprise Redundant’s:

Digit Strings and FaxPress Enterprise Redundant Parsing Capability

Digit strings are a combination of numeric and alphanumeric digits generated either by the PBX system or by the line carrier. DNIS (Dialed Number Identification Service) digits identify for the call recipient the number the caller dialed by passing the dialed digits from the line carrier. To use the Enterprise Redundant’s automatic inbound fax routing feature, DNIS string information is required. This includes number of DNIS digits, total length of the string including ANI digits (if any), and other characters.

The FaxPress Enterprise Redundant’s configurable digit filter, part of the Routing Type interface (see Select the Routing Type tab.) allows the FaxPress Enterprise Redundant to support every possible digit string and most PBX systems. The digit filter can be configured to strip non-essential, garbage information and retain only the digit information required to identify the recipient’s mailbox ID. If, as an example, the dialed number is 408-852-7081, the call may be sent as1188 408 852708199 while it is being routed through the central office or PBX system. Since the Enterprise Redundant only requires the last three or four digits to identify the recipient, any unnecessary digits are parsed off the number, e.g. xxxxxx7081.

Preparing your PBX System for Automatic Fax Routing

FaxPress Enterprise Redundant and PBX system integration may require you to make some program changes to your PBX. The majority of PBXs can be programmed to integrate with a variety of voicemail systems. Your PBX will see the FaxPress Enterprise Redundant as a kind of secondary voicemail system. For more information on specific PBX systems, see the Castelle PBX documentation library.  

Configuring the FaxPress Enterprise Redundant for Automatic Routing

Both the Enterprise Redundant’s Server Properties and User Properties must be configured with DNIS and mailbox ID information to support automatic routing. The Server Properties configuration is described here. The User Properties configuration is described in Configuring the User Properties: Mailbox IDs. Following the configuration, send a test fax from an external fax machine through your digital line and PBX system to the FaxPress Enterprise Redundant to confirm the automatic routing/PBX system integration is successful.

To configure the Server Properties for PBX and/or automatic routing integration, follow these steps:

If the trunk or lines provided by your phone company are inbound only lines, make sure the Line Direction section’s Input Only radio button is selected. Otherwise, select Bi-Directional.

Although this is not specifically required for automatic routing, if you’re using your Enterprise Redundant with a PBX, make sure any prefix your PBX system requires for accessing Local, Long Distance, and International outside phone lines is entered in the PBX Pre-dial section. The Enterprise Redundant automatically inserts a 3 second pause after the PBX pre-dial code. Inserting a comma after the PBX digits is unnecessary.

Select the Disabled radio button for unused fax channels. The Disabled radio button must be selected if your T1 line uses ISDN rather than CAS E&M Signaling Protocol. See FaxPress Enterprise Redundant T1for more information.

Select Assign Line to User only if automatic inbound routing will not used for the current fax line. In this case, select UNADDRESSED as the user. The UNADDRESSED mailbox allows users with Operator, Router, or Administrator privileges to route faxes from the Unaddressed mailbox to any other mailbox.

In the Total String Length field, enter the total number of digits, including both mailbox ID digits and garbage digits, passed to the Enterprise Redundant.

Use the Number of DNIS Digits field to enter the number of digits used in the mailbox ID. The FaxPress Enterprise Redundant supports up to 7 digits for the mailbox ID, although mailbox IDs are more commonly 3 or 4 digits. Use the Starting Position field to indicate where in the total string the mailbox ID digits begin, i.e. whether it’s positioned at the beginning, in the middle, or at the end of the string.

Use the Number of ANI Digits field to enter the number of ANI digits, if any, that occur in the string. ANI digits are used for Caller ID purposes outside the United States. Use the Starting Position field to indicate where in the total string the ANI digits begin.

Use the Mask Value field to enter the entire digit string. Use D to represent the digits the Enterprise Redundant will use for the Mailbox ID, and X to represent the unnecessary digits the Enterprise Redundant will strip. The Enterprise Redundant supports up to 7 digits for the mailbox ID, although mailbox IDs are more commonly 3 or 4 digits.

In the Incoming Faxes section, the Administrator and Unaddressed radio buttons allow you to specify the destination for incoming faxes that are either misaddressed or without a recognizable mailbox ID.

Configuring the User Properties: Mailbox IDs

For automatic inbound routing and PBX integration, FaxPress Enterprise Redundant user accounts must be assigned mailbox IDs that associate them with their corresponding fax numbers. Mailbox IDs are three or four digits, depending on how many digits your digital line or PBX is passing to the FaxPress Enterprise Redundant.

To configure the User Properties with mailbox IDs, follow these steps:

In the User Properties, with the User Account tab selected, enter an identifier number in the Mailbox ID field. The identifier number may contain up to 7 DNIS digits, although more commonly the Mailbox ID will be 3 or 4 digits. If necessary, enter a PBX access code in the PBX Access Code field.

See Creating and Configuring User Accounts for more information on configuring the other User Properties.

Determining DNIS Digit String/Mailbox ID Information

If you’re not sure how many digits your line carrier or PBX is passing to the Enterprise Redundant, and have not been able to acquire this information from the telephone company, use the To enable DID receiving diagnostic mode to record, in a dtmf.log file, the mailbox IDs of all fax recipients, the time of the incoming faxes, and the number of DTMF digits passed by the PBX.

To enable the DID receiving diagnostic mode, follow these steps:

Infrequently, synchronization issues between the Enterprise and the central office will cause issues with sending and receiving multiple page faxes. See Troubleshooting the FaxPress Enterprise/Enterprise Redundant T1’s Dialogic Fax Board for help.

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