DMS-100 Toll-Free Service Screening Table (TFSSCRN)

Table Name

Toll-Free Service Screening Table

Functional Description of Table TFSSCRN

Table TFSSCRN lists the toll-free numbers subject to Bellcore/Telcordia GR-2892 (Switching and Signaling Generic Requirements for Toll-Free Service Using AIN) processing.  When a number encounters the Number Service Code (NSC) selector, a check is made to determine whether or not it is on the list.  When the number is on the list, it bypasses Bellcore/Telcordia TR-533 (Database Services Service Switching Points - Toll-Free Service [E800]) processing and proceeds as an Advanced Intelligent Network (AIN) call.

Datafill Sequence & Implications

Table TRIGDIG (Trigger Digits) is datafilled before table TFSSCRN.

When a corresponding AIN trigger is not present in table TRIGDIG, the results are as follows:

Table Size

The minimum table size for table TFSSCRN is 0 tuples, and the maximum table size is 32,000 tuples.  A restart is not required to increase table size.

Datafill

The following table describes datafill for table TFSSCRN:

----------------------------------------------------------------------------------------------
Table TFSSCRN Field Descriptions

Field       Subfield       Entry               Explanation and Action
----------------------------------------------------------------------------------------------
TFSCODE                    800, 888, 877,      TFSCODE describes the toll-free code (SAC)
                           866, 855, 844,      in use.
			   833, 822
----------------------------------------------------------------------------------------------
FROMNXX                    000 to 999          FROMNXX describes the lower-bound of the range
                                               of the numbers in this SAC, that are processed
					       by GR-2892.
----------------------------------------------------------------------------------------------
TONXX                      000 to 999          TONXX describes the upper-bound of the range of
                                               the numbers belonging to GR-2892.

                                               Note: The numbers belonging to GR-2892 must be 
					             greater than or equal to FROMNXX.
----------------------------------------------------------------------------------------------
-End-

Datafill Example

The following example MAP display shows sample datafill for table TFSSCRN:


TFSCODE     FROMNXX     TONXX
_____________________________
800         622         733