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Cisco BTS 10200 Softswitch ISDN Provisioning and Troubleshooting
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Chapter 1 ISDN Provisioning
ISDN Features and Supplementary Services
Information Digit Feature
The Information Digit feature provides functionality to receive and deliver originating line information
(OLI or II digits) collected from an originating switch (or provisioned in the Cisco BTS 10200
Softswitch for local subscribers) to the far-end. The Nortel DMS variant of the ISDN PRI protocol
supports using the Generic Digits Information element (Type of Digit = 4) to carry information such as
Info Digits.
If Info Digits (Type of Digits = 4) are received from an incoming ISDN trunk group, these digits are
considered as OLI and are used for policy-based routing. The OLI information can also be used for digit
manipulation.
The processing of Generic Digits is controlled using the configurable GENDIGITS-IE-SUPP flag in the
ISDN D-Channel Profile table for an incoming trunk group. If this is configured as N, the
Cisco BTS 10200 Softswitch ignores and drops the Generic Digits parameter in the SETUP message.
If GENDIGIT-IE-SUPP is configured as Y, the Cisco BTS 10200 Softswitch decodes and processes the
Generic Digits IE from any code set if received.
Note
The GENDIGITS-IE-CODESET flag in the ISDN D-Channel Profile table is not applicable to the
receiving trunk group.
The following new ISDN D-Channel Profile table tokens are used to provision Generic Digits:
•
gendigit-ie-supp
•
gendigit-ie-codeset
•
gendigit-tod-infodigit
The following example shows how to provision new generic digit tokens:
add isdn-dchan-profile id=dms-250; type=swv-dms-pri; interface-type=network;
gendigit-ie-supp=y; gendigit-ie-codeset=6; gendigit-tod-infodigit=4;
Because the Info Digits information is associated with a charge number, whether the information is sent
out as Info Digits depends on following factors:
•
If the send-bdn-as-cpn or send-bdn-for-emg tokens are set to Y for the main subscriber entry
configured for an incoming trunk group (which can be CAS, ISDN, H323 or SIP), the
Cisco BTS 10200 Softswitch sends the OLI configured in the incoming Subscriber table entry as
Info Digits.
•
If the billing-dn token is configured for a main subscriber entry for an incoming trunk group (which
can be CAS, ISDN, H323 or SIP), the Cisco BTS 10200 Softswitch sends the OLI configured in the
incoming Subscriber table entry as Info Digits.
•
If the OLI is available in a new call message from an incoming trunk group (which can be received
as Generic Digits in ISDN or OLI in SS7), the Cisco BTS 10200 Softswitch passes the OLI received
in the incoming message to the outgoing SETUP message.
•
If the main Subscriber entry is configured for the incoming trunk group, the Cisco BTS 10200
Softswitch sends the OLI configured in the incoming Subscriber table as Info Digits.
•
If none of the configurations in the above bullets occurred, the Cisco BTS 10200 Softswitch does
not send any Info Digits.