Configure H.323 without GateKeeper
The H.323 Configuration procedure configures an H.323 signaling stack, H.323 Profile, an H.323 channel group, and connects to an external H.323 gateway. The procedure describes the configuration needed to accept a call coming from a network utilizing H.323 as its signaling protocol. Below is a Quick Start diagram displaying the objects. In addition, the objects that are displayed as blue font, are links to the topics.
Initial Configuration
Before proceeding, verify that the functionality in the Basic Configurations topic has been completed. The Basic Configurations topic configures objects such as VoIP Interfaces and IP Bearer ports needed prior to starting the Configure H.323 topic.
Configure H.323 Profile (SGP)
When communicating with an external gateway there are various attributes/features that need to be associated with that particular gateway. Within the H323 Profile object the attributes/features can be configured and then linked to the External H.323 Gateway object. The H.323 Profiles configured can be selected from a drop down menu in the object described above.
The first section below may have already been configured if the Basic Configuration topic has been completed. Skip the Configure H.323 Signaling Stack if the H.323 Profile objects have already been configured.
Right click on the Profiles object and select New H323 Profiles. The H323 Profiles object is a container object and no configuration is needed here. Refer to the H.323 Profiles topic for more information on this object.
Right click on the H323 Profiles object and select New H323 Profile. The first H.323 Profile created is the default H.323 Profile and all the fields will be shaded green. In the default profile, the fields cannot be modified. Disregard this profile.
Right click on the H323 Profiles object again and select New H323 Profile again. In the H.323 Profile object that appears, either enter a name that identifies this Profile or accept the default name already entered. In this example the default name H323_Profile_1 was accepted. Refer to the H.323 Profile topic for more information on configuring the remaining fields in this object.
OPTIONAL: Right click on the H323 Profile object just created and select New H323 Profile Timers. Within this object, the various timers utilized in the H.323 protocol can be modified as required. Refer to the H.323 Profile Timers topic for more information on this object.
Configure H.323 Signaling Stack
Configure the H.323 Signaling stack that will be used by IMG 2020. The H.323 stack must be created for each IMG 2020.
Right click on the IMG 2020 object and select New Signaling. In the Signaling object that appears, there is no configuration needed. Refer to the Signaling topic for more information on this object.
Right click on the Signaling object and select New H323. An H.323 signaling object gets created. In this procedure, a Gatekeeper will not be used so the Gatekeeper Support field must be left in the Disable state. Refer to the IMG 1010 - H.323 Signaling Object topic for information on configuring the remaining fields in this object.
Right click on the H323 object and select New H323 IP Address. In the H323 Signaling IP Address field, select from the drop down menu the IP address that will be given to the H.323 stack. The default IP address displayed in the H323 Signaling IP Address field is the IP address configured to the CTRL 0 interface during the bootup process. This can be modified as required. Refer to the H.323 IP Address topic for more information on this topic.
Configure H.323 External Gateway
The IMG 2020 will be communicating with a remote external H.323 gateway. Configure the External Gateway object to be able to communicate with this remote H.323 gateway.
Right click on the Dialogic object and select New External Network Elements. The External Network Elements object is a container object and no configuration is needed here. For more information on this object refer to the External Network Elements topic.
Right click on External Network Elements and select New External Gateways. The External Gateways object is a container object also and no configuration is needed here. For more information on this object refer to the External Gateways topic.
Right Click on External Gateways object and select New External Gateway. In the Name field, enter a name that identifies this gateway. In this procedure the name Ext_H323_Gateway1 was entered.
Select H323 from drop down menu in Protocol field.
In the IP Address field, enter the IP address needed to be able to communicate with the remote H.323 gateway.
In the Profile field, select the H.323 Profile that was created earlier in this procedure. The profile added has the attributes/features needed to communicate with this gateway. For more information on configuring the External Gateway object, refer to the External Gateway topic.
Configure Channel Group and External Network Element
Configure an H.323 Channel Group. The H.323 channel group will communicate with the external H.323 gateway created above. Once the channel group is configured, the external network element that the channel group will communicate with can be configured. Refer to information below.
Right click on the Dialogic object and select New Routing Configuration. The Routing Configuration object is a container object and no configuration is needed here. For more information on this object refer to the Routing Configuration topic.
Right click on the Routing Configuration object and select New Channel Groups. The Channel Groups object is a container object for multiple channel groups. No configuration is needed here. For more information refer to the Channel Groups topic.
Right click on the Channel Groups object and select New Channel Group. In the Name field, either except the default name or enter a name that identifies the Channel Group being configured. In this procedure, the name entered was ChGrp1_H323_GW.
Select H323 from the drop down menu in the Signaling Type field.
Select the Incoming and Outgoing IP Profile from drop down menu. The IP Profile was initially created in the Basic Configurations topic. For more information on configuring the remaining fields in the channel group object, refer to the Channel Group topic.
Right click on the H.323 Channel Group just created and select New IP Network Element. Select from drop down menu the gateway configured in the Configure H.323 External Gateway section above. Refer to the IP Network Element topic for more information on this object.
Configure a Packet Facility for Channel Group
The remote external gateway will need a group of IP Channels to pass the RTP between the remote gateway and the channel group just created. The RTP is passed on IP Channels called Packet Facilities. Configure the packet facility.
The Packet Facilities should already have been configured if the Basic Configurations topic was initially followed. If the Packet Facilities have not already been created, refer to the IMG 1010 - Basic Configuration and/or Configure Packet Facilities topic for information on how to complete this configuration.
Link the Packet Facility to the H.323 Signaling stack IP address
After the Packet Facility and H.323 IP Address objects have been configured, the H.323 IP Address needs to be associated with the packet facility created. The Node Associations object is used to achieve this.
External Gateway
Go back to the IP Network Element object that was created off the H.323 Channel Group that has the Gateway configured under it. Right click on the IP Network Element and select New Node Association. In the Node field, select from the drop down menu the node that the H.323 Signaling and Packet facility are configured on.
In the Media Packet Facility field, select the Packet Facility or group of IP Channels that will be used to process the media data going between the remote gateway and the IMG 2020.
Select the IP address from the drop down menu of the Service IP Address field. This is the signaling IP for the packet facility chosen above. Refer to the Node Association topic for more information on this object.
Click on the Channel Groups object again. At this point, a yellow exclamation point will be displayed in the Icon. Click on the Download Resource Tables button and the updated Channel Group configuration will be sent to the IMG 2020.
The External Gateway along with the associated channel groups have been configured. Refer to the Routing and Translation sections for information on routing and translating an incoming/outgoing call.