In software 10.5.2 a feature was added to allow the IMG to accept a SIP message which originally had no ISUP information in it and create a SIP-T message which has the ISUP information embedded in its SIP body. The information below will explain how to configure the IMG to accept the incoming SIP message and send it out a SIP-T message.
Dialogic IMG EMS -> Profiles -> SIP SGP -> SIP to SIP-T Interworking
1 per individual SIP SGP Profile
Configuring Interworking between SIP and SIP-T
Select from a drop down menu whether the SIP to SIP-T Interworking is Disabled or Enabled. When enabled SIP-T Entity field can now be modified.
Note: To Enable SIP-T, the "Enable SIP-T" field in the SIP Signaling object must be set to 'Yes'. Verify that this field is configured correctly. SIP Signaling
When 'SIP To SIP-T Interworking' field above is enabled, the SIP-T Entity field will display a drop down menu which includes all the SIP Entities created under the SIP Signaling object.
Note: For each of the ISUP Parameters described below the individual fields are initially filled-in with f's. A field that has all f's in it will send a Default value for that parameter. Each parameter explained below will have a link set up. The links refer to a table which includes values for that parameter (binary form). Where applicable the Default value is marked in red text. If the default value marked in red is not going to be Interworked, the user must enter a hex value corresponding to the value that will be used.
The Nature of Connection Indicator is sent in the forward direction to provide information regarding the circuit connection specified in the CIC parameter of the message. This message is one byte. Click on the following link to display a table of the Nature of Connection Indicators. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Nature of Connection Indicators Table
Contain information that specifies both the preferences about the call setup in the forward direction and the conditions encountered so far in setting up the call. This message is two bytes. Click on the following link to display a table of the Forward Call Indicators (Octets 1 and 2). Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Information sent in the forward direction indicating the category of the calling party and, in case of semi-automatic calls, the service language to be spoken by the incoming, delay and assistance operators. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
The transmission medium used in a call setup is sent in the backward direction in the event that the original circuit requested could not be used.. This parameter then identifies the circuit type and is carried in the ANM, ACM, and CPG messages. Click on the following link to display a table of the Transmission Medium Requirements Table (Octets 1 and 2). Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Transmission Medium Requirement Table
Used when the subscriber is requesting data transmission on the voice facility without the use of a modem. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
User Service Information Table
The destination number that the calling party dials. Click on the following link below to display a table of the Called Party Number (Octets 1 and 2). The fields in red are the default fields that the IMG will Interwork when feature is enabled. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Sent in the "backward" direction to indicate that the remote end of a trunk circuit has been reserved. Information relating to the characteristics of the connection, signaling path and called party sent in the backward direction. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Backward Call Indicators Table
Sent in the "backward" direction to indicate that the remote end of a trunk circuit has been reserved. Information relating to the characteristics of the connection, signaling path and called party sent in the backward direction. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Backward Call Indicators Table
Information indicating the type of event which caused a call progress message to be sent. Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.
Information sent in either direction indicating the reason for sending the message (e.g. release message). Where applicable, the default values are displayed in red. These are the default values that the IMG will Interwork when feature is enabled.