Nortel DMS-100 Circuit Digit Table (CKTDIGIT) |
Table Name
Circuit Digit Table
Functional Description of Table CKTDIGIT
Table CKTDIGIT allows the end-office to map a particular 0ZZ (Domestic - 0ZZ-XXX number format), 1NX (International - 1NX-XXX-CCC number format) code (in field CKTDIGS) into a Transit Network Selector (TNS) (in field CKT_CODE) when originating an Equal Access (EA) call to an Access Tandem (AT) over Signaling System #7 (SS7) trunking. This table is also used to allow the AT to map the received TNS into a particular 0ZZ or 1NX code. The AT extracts field CARRIER_NAMES from table OCCINFO (Equal Access Other Common Carrier Information) using the XXX digits received in the TNS.
Calls arriving at an AT on SS7 trunks are identified as EA calls by the presence of the TNS parameter. The TNS parameter contains the equivalent of the Multifrequency (MF) EA 0ZZ-XXX or 1N/NZ-XXX digits.
In the AT switch, the combination of the resultant 0ZZ or 1NX with the XXX digits (and CCC or 01R for international carrier calls) from the TNS is provided to pretranslations. The pretranslation either results in an Interexchange Carrier (IEC) route selection or the activation of a Service Switching Point (SSP) function such as an Enhanced 800 Service (E800) database query.
Datafill Sequence & Size
The following tables must be datafilled before table CKTDIGIT:
An entry can be deleted from table CKTDIGIT at any time without special requirements. If the carrier is deleted from table OCCINFO without deleting it from table CKTDIGITS first, the entry in table CKTDIGIT is automatically deleted. Table size is 0 to 1,780 tuples.
Datafill
The following table describes datafill for table CKTDIGIT:
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Table CKTDIGIT Field Descriptions
Field Subfield Entry Explanation and Action
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KEY See Subfields Key
This field consists of subfields
CARRIER_NAMES and CKT_CODE.
CARRIER_NAMES Alphanumeric Carrier Names
(1 to 16 characters) Enter the name of the carrier for equal
access calls. See table OCCNAME.
CKT_CODE 1, 2, 8 to 15 Circuit Code
At the end-office, enter the circuit code
to be included in the TNS optional
parameter in an Initial Address Message
(IAM).
At the AT, enter the circuit code expected
in the TNS optional parameter in an IAM
received at the switching unit for an EA
call from an EA end-office.
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CKTDIGS 000 to 999 Circuit Digits
Enter the first three digits in the EA
signaling digit sequences 0ZZ-XXX,
1N/NX-XXX-CCC, or 1N/NX-XXX-01R transmitted
on MF trunks. In the AT, these digits are
used to single out one of the outgoing
circuits in the carrier group identified by
the XXX digits.
Note: The first digit must be 0 or 1.
The remaining two digits can be any value
from 00 to 99.
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-End-
Datafill Example
The following example MAP display shows sample datafill for table CKTDIGIT.
KEY CKTDIGS _______________ GTE 1 179 GTE 11 099 ITT 1 179 ITT 11 099 SSP 8 088 |