SIP Carrier Identification Code (CIC) and Dial Around Indicator Code (DAI)

Overview

The IMG supports the Interworking of the ISUP IAM Carrier Identification Code (CIC) and Dial Around Indicator (DAI) parameter to the R-URI of the SIP INVITE. The CIC and DAI parameter is enabled through the SIP SGP Profile Pane in Clientview. See the R-URI Header Tags description in the SIP SGP Profile pane for more information.

 

Carrier Identification Code: CIC

The CIC parameter consists of a three or four digit code which identifies information sent in the forward direction to a transit network. This parameter indicates the specific transit network selected by the originating subscriber. The CIC parameter is carried in the SIP INVITE request R-URI and maps to the Carrier Identification Parameter (CIP) or Transit Network Selection (TNS) Parameter in the ISUP IAM and vice-versa.

 

Dial Around Indicator: DAI

The DAI is included in the SIP INVITE request R-URI which identifies how the carrier in the Carrier Identification Code is chosen. The DAI parameter is carried in the SIP R-URI and maps to the Carrier Selection Information (CSI) Parameter in the ISUP IAM and vice-versa. Below is a table of the ISUP CSI and its corresponding value in SIP DAI.

 

Note: If the presubUnkwn-da or operator DAI are received they will be mapped to ISUP CSI 0x00 (No Indication)

 

ISUP CSI Value (Hex)

SIP 'DAI' Parameter

0x00

no-ind

0x01

presub

0x02

presub-da

0x03

presub-daUnkwn

0x04

da

0x05

CIC-chrgPty

0x06

altCIC-chrgPty

0x07

verbal-clgPty

0x08

verbal-chrgPty

0x09

emergency

n/a

presubUnkwn-da

n/a

operator

 

 

 

Example: (SIP INVITE with CIC and DAI information)

 

INVITE sip:044;cic=6789 ;dai=presub @10.129.39.60:5060 SIP/2.0

 

 

Call Flows

SS7 to SIP

This call flow demonstrates that when the IMG receives an ISUP IAM request from the PSTN/SS7 which has the Carrier Identification (CIP) and Carrier Selection Information (CSI) Parameters included in the IAM message. These will be interworked to the cic and dai parameters of the SIP URI of the INVITE request.

 

CF_SIP_Car_ID_CODE_SS7_SIP.png

 

 

SIP to SS7 ANSI

This call flow demonstrates that when the IMG receives a SIP INVITE R-URI containing the ‘cic’ and 'dai' parameters, it will be interworked to the CIP and CSI of the ISUP IAM.

 

CF_SIP_Car_ID_Code_SIP_SS7ANSI.png

 

 

SIP to SS7 ITU

This call flow demonstrates that when the IMG receives a SIP INVITE R-URI containing the ‘cic’ tag, that the IMG will interwork an IAM ISUP request to the SS7 ITU side with the Transit Network Selection.

CF_SIP_Car_ID_Code_SIP_SS7ITU.png

 

SIP to SIP

The call flow below demonstrates that when the IMG is doing something like transcoding that the 'cic' and 'dai' values are passed through the IMG transparently.

 

CF_SIP_Car_ID_Code_SIP_SIP.png

 

 

Troubleshooting

If experiencing problems with this feature, verify the following:

 

INVITE sip:044;cic=6789@10.129.39.60:5060 SIP/2.0