Interwork CPG message to SIP INFO after ANM
After a call is connected if the IMG receives a Call Progress (CPG)
message with the Generic Notification Indicator parameter embedded, it
will interwork the parameter into a SIP INFO message on the SIP side.
The interworked parameter will be of the format: Generic-Notification:
XY (The variables XY would be the hexadecimal representation of
the generic indicator). When configured, this functionality would only
apply to the CPG message received after the ANM (after call is connected).
See information below.
Call Flow

Configuration
Below are instructions
on how to configure the IMG to interwork the Generic Notification parameter
into a SIP INFO message that is sent after the call has been connected.
Verify the following entities are configured before proceeding:
Configure these initial
objects before proceeding to the procedure below.
Create SIP Channel Group
- Right click on Channel Groups object and select New
Channel Group. Set the Signaling
Type field to SIP and enter a name for this channel group.
Refer to Channel Group topic for more
information on configuring a SIP Channel Group.
Create SIP SGP and SIP Headers objects
- Right Click on the Profiles object and select New
SIP SGP. Once SIP SGP pane is created, change the SIP Profile
ID to something other than '0' by selecting a different ID from the
drop down menu. This will allow user to edit the SIP SGP Profile.
Refer to SIP SGP topic for more information
on configuring this object.
- Right Click on the SIP SGP object and select New
SIP Headers. In the SIP Headers object that appears enable
the Generic Notification field. See screen capture below.

Create External SIP Gateway
- Right click on IMG EMS and select New
External Network Elements. No configuration is accomplished
here. The External Network Element pane is a parent object to multiple
external entities in the network. Refer to External
Network Elements topic for more information.
- Right click on the External Network Elements object and select
New External Gateways. Again,
no configuration is accomplished here. Refer to External
Gateways object for more information.
- Right click on External Gateways object and select New
External Gateway. Enter a name to identify this gateway, modify
the Gateway Signaling Protocol field to display SIP, and enter an
IP address in the Gateway IP Address field.
- Within the SIP Profile field select the SIP SGP created above for
the Generic Notification feature. See screen capture below.

Right click on the SIP channel group
created earlier and select New IP
Network Element. Select the gateway created above that has
the Generic Notification SIP SGP associated with it.
At this point the feature has been configured.
Routing and translations can now be accomplished.
Additional Information
- If multiple CPG messages are received from SS7 side, each CPG would
be mapped to a SIP INFO message.
- If the Generic Notification, which is an optional parameter, is
not received in the CPG THEN NO sip info will be sent.
- This functionality would only apply to messages received after
the ANM (Call is answered).
- The feature is configurable in the SIP Headers object and is disabled
by default.