SIP Delayed Media Calls - Outbound


Before software version 10.5.3, the IMG supports receiving incoming delayed media SIP calls where the incoming INVITE message does not contain an offer SDP. The IMG would then respond with a 200 OK message containing the offer SDP and negotiations would proceed after receiving ACK for INVITE with answer SDP. F-1666 gives the IMG the ability to generate the outbound delayed media SIP call where INVITE generated does not contain offer SDP. Negotiation will proceed once offer SDP is received from far end provisional response or in final response. The IMG will either pass, release, or cancel the call.


Scenario 1:




Scenario 2:




Scenario 3:




Configuration Procedure:

The procedure below explains how to configure the IMG for feature F-1666. Verify the following entities are configured before proceeding:


Configure these initial objects before proceeding to the procedure below.

Create an Signaling Gateway Profile (SGP) for Delayed Media Feature

  1. Right Click on the Profiles object and select New SGP. In the SGP object Enter a Name to identify this object, change the ID to something other than ID:0. Enable the Outbound Delayed Media by selecting ‘Enabled’ from drop down menu. See screen capture below.


    See SIP SGP for more information on configuring the SGP pane.

  2. Right Click on IMG Name and select New Signaling. The Signaling Object is created to allow multiple signaling objects below it. No configuration needs to be accomplished in this object. See Signaling for information on this object

  3. Right Click on Signaling Object just created and select New SIP. Select the SIP Gateway Profile just created from drop down menu in the ‘Remote IMG’s SIP Profile. See screen capture below.


    See Configuring SIP Signaling for more information on this object

Creating SIP Channel Groups:

  1. Right Click on Dialogic IMG EMS and select New Routing Configuration. See Routing Configuration for more information.
  2. Right Click on Routing Configuration and select New Channel Groups. No configuration is needed within the Channel Groups object. This object is configured so that multiple Channel Group objects can be configured below it.
  3. Right Click on Channel Groups object and select New Channel Group. Enter a name to identify this channel group and change the ‘Signaling Type’ to SIP using the drop down menu. See SIP Channel Group for more information on configuring a SIP channel group.


Create an external network element:

An external network element must be created. Configure the external gateway that the SIP channel group will send messages to as the external network element.

  1. Right Click on Dialogic IMG EMS and select New External Network Elements. The External Network Elements object is created to allow multiple external network element objects to be created under it. There is no configuration required in this object. See External Network Elements for more information.
  2. Right Click on External Network Elements object and select New External Gateways. The External Gateways object is created to be able to configure multiple gateways objects to be created under it. There is no configuration required in this object. See External Gateways for more information.
  3. Right Click on External Gateways object and select New External Gateway. Enter a name in the ‘Name’ field to identify this gateway. Select SIP from drop down menu in the Gateway Signaling Type field. External Gateway for more information.





Insert SIP External Network Element into SIP Channel Group:

  1. Right Click on SIP Channel group and select New IP Network Element. Select the Gateway created under the External Network Elements that was just created. See screen capture below.




  1. At this point the feature has been configured. Below is screen capture of the Delayed Media Tree within ClientView.