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7-34 Feature interaction
Authorization codes
Authorization codes (authcodes) are multidigit codes used to identify a
subscriber, to bill a call to a subscriber, to prevent unauthorized access to the
network, and to indicate class of service and special features available to the
subscriber. The DMS-250 switch supports five, six, and seven digit authcode
numbers. However, to the subscriber, the authcode may be 0–7 digits in
length, depending on how parameters are datafilled. Authcodes can be
entirely dialed by the subscriber, entirely filed in the originating trunk group
data, or partially dialed and partially filed.
On the DMS-250 switch, each call that originates over a PRI is associated
with an authcode. For PRI, this association is performed by table
CALLATTR. In this table, the field VAUTHFLD contains the authcode filed
against the ISA call type. If the originating call contains a call type that is
not datafilled or is not allowed, the call is routed to treatment.
Validation
For each call made over PRI, authcode validation is performed against the
authcode filed in table CALLATTR. The authcode is searched for in the
filed authcode in the network control system database. (For more
information about the network control system, see Chapter 5, "Call control
procedures."
Found in database—If the authcode is found in the database, the status of
the authcode is examined to determine the course of action to take in
handling the call. If the status of the authcode is valid, call processing
proceeds normally on the call, using the data stored against the authcode to
process the address digits received in the CALL SETUP message.
The following information related to the authcode is returned to the original
call processing agency. These parameters help specify how many more digits
to collect and the eligibility of the call.
Not found in database—If the authcode is not found in the database, the
authcode is assumed to be invalid and the treatment INVALID AUTHCODE
(INVA) is applied to the call. If necessary, treatment-to-cause mapping is
297-2521-106 Standard 23.01 March 2001
valid or invalid status
account code
partition number
city code
global authcode indicator
restricted usage by date and time
hotline number (if any)
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