SIP CIC and DAI codes

The 2020 IMG supports the Interworking of the ISUP IAM Carrier Identification Code (CIC) RFC 4694 and Dial Around Indicator (DAI) parameter draft-yu-tel-dai-00 into the R-URI of the SIP INVITE. The CIC and DAI parameter is enabled through the SIP SGP Profile object. 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.

 

Call Flows

SS7 to SIP

This call flow demonstrates that when the 2020 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 2020 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 2020 IMG receives a SIP INVITE R-URI containing the ‘cic’ tag, that the 2020 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 2020 IMG is doing something like transcoding that the 'cic' and 'dai' values are passed through the 2020 IMG transparently.

 

CF_SIP_Car_ID_CODE_SIP_SIP.png

 

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

 

The 2020 IMG interworks the ISUP Carrier Selection Information into SIP dai parameter

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

 

Configuration

To configure whether the CIC and/or DAI codes will be interworked, the configuration is accomplished in the SIP SGP object. Follow procedure below to configure.

 

Initial Configuration

Before configuring, the 2020 IMG must have an initial configuration created on it. Follow the Basic Configurations procedure before proceeding onto configuring the SIP Session Timer feature.

 

Create SIP Profile (SGP) and enable ISUB Encoding

  1. Right click on Profiles object created earlier and select New SIP SGP. A SIP object will appear. Change the ID from the first field to something other than ID:0. ID:0 is the default SIP profile and the SIP isub encoding field cannot be configured within this default object.

  2. Click in the field labeled R-URI Header Tags and a Select multiple items box will appear. Select CIC and DAI from list and select OK. See screen capture below

SC_CIC_DAI_SGP_Config.png

 

Create SIP signaling stack

  1. Right Click on 2020 IMG Name and select New Signaling. The Signaling Object allows multiple signaling objects to be configured below it. No configuration is needed in this object.

  2. Select the SIP SGP created above from drop down menu in the Remote 2020 IMG's SIP Profile field. For more Information refer to SIP Signaling.

 

Create an External Network Element

Create an external gateway through the external network element object. This will be the gateway that the 2020 IMG will communicate with.

  1. Right click on Dialogic 2020 IMG EMS and select New External Network Elements. An External Network Elements pane will appear. No configuration is accomplished in this pane. This pane is a placeholder for multiple Network Elements to be created beneath it. See External Network Elements object for more information.

  2. Right Click on External Network Elements object created and select New External Gateways. An External Gateways pane will appear. again this pane is a placeholder from multiple External Gateways. No configuration is needed. See External Gateways for more information.

  3. Right Click on the External Gateways object and select New External Gateway. A screen like below will appear.

SC_CIC_DAI_GW_Config.png

 

Additional Information

Troubleshooting

If experiencing problems with this feature, verify the following:

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