Configure SS7 Redundant Nodes
- Kelli Higdon
The procedure below configures SS7 Redundancy/ High Availability onto a Primary and Secondary IMG 2020 node. The quick start diagram below displays the objects required to configure SS7 redundancy. Before starting the SS7 Redundancy procedure, verify the Basic Configurations topic has been completed on each of the two nodes being configured
Configure SS7 Network
When configuring the SS7 network, any of the configured BN 2020 nodes can be used as a Primary SS7 server, Secondary SS7 server, or SS7 remote node. The node functionality is assigned under the SS7 Network. Follow instructions below.
Right click on the Dialogic object and select New SS7. The SS7 object is a parent or container object and no configuration is required within this object. Refer to the SS7 - Signaling topic for more information on this object.
Right click on the SS7 object and select New SS7 Network. Select a Network ID from the drop down menu. Up to four separate SS7 networks can be created. Refer to the SS7 - Network topic for more information on this object.
Right click on the SS7 Network object and select New SS7 Nodes. The SS7 Nodes object is a parent or container object also and no configuration is required in this object. Refer to the SS7 - Nodes topic for more information on this object.
Right click on the SS7 Nodes object and select New Primary Node. Within the Primary Node object select from the drop down menu of the Node Name field which node will be assigned as the Primary SS7 server node. Refer to the SS7 - Nodes - Primary Node topic for more information on this object.
Right click on the SS7 Nodes object again and select New Secondary. Within the Secondary Node object select from the drop down menu of the Node Name field which node will be assigned as the Primary SS7 server node. Refer to the SS7 - Nodes - Secondary Node topic for more information on this object.
Optional: If configuring remote CICs, right click on the SS7 Nodes object again and select New Remote. In the remote node object, select the node from the drop down menu of the Node Name field that will have the remote CICs configured on it. In this procedure, the SS7 signaling that controls the CICs on the remote node will be processed on the Primary and Secondary nodes created above. Refer to the SS7 - Nodes - Remote Node topic for more information on this object.
Configure the SS7 Stack
Configure the SS7 signaling stack and enter its Originating Point Code.
Right click on the SS7 Network object again and select New SS7 Stack. The Stack ID is automatically populated with next available Stack ID number. In the OPC field, enter the OPC (Originating Point Code) of the SS7 stack being created. Refer to the SS7 - Stack topic for more information on configuring the remaining fields in the SS7 stack object.
Configure Link Sets
A "signaling link set" is an abstract path between the IMG 2020 and an APC (Adjacent Point Code). Within each link set, numerous physical signaling links can be added. All links in a link set must be controlled by the same SS7 signaling stack. A typical configuration consists of two link sets. Signaling links in a link set are “load sharing” that is, signaling traffic is distributed equally on the links to optimize efficiency. When configuring more than one SS7 stack, the Link Set ID's that are assigned to each signaling stack must not match. For example, if Link Set ID is assigned to SS7 stack 1, that Link Set ID cannot also be assigned to SS7 stack 2. Follow the procedure below to configure the SS7 Link Set.
Right click on the desired SS7 Stack and select New SS7 Link Set. The SS7 Link Set pane appears. The Link Set ID field is automatically populated with the next available ID. To modify, select another ID from the drop down menu.
In the APC (Adjacent Point Code) field, enter the point code of the SS7 stack of the adjacent node to which this link set will be communicating with. The format of the APC will follow the same rules as that of the SS7 stack. For example if the OPC is ITU 97, which follows the format 3-8-3, the APC should also be running ITU 97 and follow the 3-8-3 format. For more information on configuring the remaining fields of the Link Set object pane refer to the SS7 - Link Set topic.
Configure SS7 Link
An SS7 Signaling Link is a point-to-point connection between two SS7 point codes (For example: A IMG 2020 and an STP). The SS7 Signaling Link is configured under the Signaling Link Set object. When configuring more than one SS7 stack, the Link ID's assigned to each signaling stack must be distinct. For example, if Link ID:1 is assigned to SS7 stack 1, it cannot also be assigned to SS7 stack 2.
Right click on the desired SS7 Link Set and select New SS7 Link. The Link ID field is automatically populated with the next available ID. The ID can be modified by selecting a different ID from the drop down menu.
In the BDN Node field, select from the drop down menu which node the link will be configured on. The nodes displayed in the drop down menu are the nodes initially created under the SS7 nodes object. In this example, the node that the first SS7 link will be configured on will be the Primary SS7 node configured above.
The Span: and Channel: fields will display all the DS-1's and DS-0's available on the node selected. Select from the drop down menu the DS-1/DS-0 that the link will be created on. By default the first available DS-1/DS-0 is displayed. For more information on configuring the remaining fields in this object, refer to SS7 - Link Set - Link topic.
Right click on the SS7 Link Set again and select New SS7 Link. Assign a second SS7 link to the node configured as the Secondary SS7 Node. At this point, there will be a link on each SS7 server node.
Configure the Destination
The SS7 Destination object communicates to the stack what the Destination Point Code of the SS7 endpoint is. The SS7 Destination is termed as the endpoint in an SS7 network and is not considered any of the signaling transfer points the SS7 signaling passes through. Follow procedure below.
Right click on the SS7 Stack and select New Destination. The Destination ID is automatically populated and cannot be modified.
Enter the point code of the endpoint in the DPC field.
ITU - Point codes range from 0-0-0 to 7-255-7.
ANSI - Point codes range from 0-0-0 to 255-255-255.
Refer to the M3UA SS7 Destination topic for more information on this object.
Configure SS7 Route
The path the SS7 signaling messages pass going from the OPC (Originating Point Code) to the DPC (Destination Point Code) is the SS7 Route. When configuring multiple SS7 stacks, the Route ID's assigned to each signaling stack must be different. For example, if Route ID:1 is assigned to Stack 1, it cannot also be assigned to Stack 2.
Right click on the Destination object and select New SS7 Route. The SS7 Route pane appears. The Route ID field is automatically populated with the next available ID.
Select from the drop down menu of the Linkset field the Linkset that will be utilized.
In the Priority field, configure the priority that will be assigned to the route being configured. This is applicable when there are multiple routes going to the same destination. For more information on the SS7 Route pane refer to the SS7 - Destination - Route topic.
Configure the SS7 ISUP Group and Circuit Group (CICs)
Under the Destination object, multiple ISUP Groups can be created. The ISUP Groups created will be linked to a Channel Group object which will be completed later in this procedure. In the procedure below, the CICs are assigned to first the Primary nodes and then the Remote node. Follow procedure below which creates an ISUP Group.
Right click the on the Destination object and select New SS7 Group. Select from the drop down menu of the ISUP Profile field which ISUP Profile created under the Profiles object will be utilized in the ISUP Group being created. Refer to the ISUP Group topic (SS7 - Destination - ISUP Group - ANSI, SS7 - Destination - ISUP Group - ITU) for more information on configuring the remaining fields within this object.
Right click on the SS7 ISUP Group object and select New SS7 Circuit Group. In the Node Name field, select the node configured as a Primary Node in the Configure SS7 Network section above. The first group of CICs will be configured on the Primary Node.
Select from the drop down menus of the next four fields, the Starting and Ending Spans/Channels (DS-1's/DS-0's). The DS-1/DS-0's displayed in the drop down lists are the DS-1's/DS-0's available on the Primary Node which was selected from the Node Name field.
Enter a Start CIC number in the Start CIC field.
Right click on the SS7 ISUP Group object again and select New SS7 Circuit Group. In the Node Name field, select the node configured as a Secondary Node in the Configure SS7 Network section above. The second group of CICs will be configured on the Secondary Node.
Select from the drop down menus of the next four fields, the Starting and Ending Spans/Channels (DS-1's/DS-0's). The DS-1/DS-0's displayed in the drop down lists are the DS-1's/DS-0's available on the Secondary Node which was selected from the Node Name field.
Enter a Starting CIC number into the Start CIC field. Refer to the SS7 - Circuit Group under Signaling topic for more information on configuring the remaining fields in this object.
Configure SS7 Channel Groups and a second SS7 Circuit Group
Configure an SS7 Channel Group to communicate with the local SS7 network.
Right click on the Dialogic object and select New Routing Configuration. The Routing Configuration object is a container object and no configuration is required. Refer to the Routing Configuration topic for more information on this object.
Right click on the Routing Configuration object and select New Channel Groups. The Channel Groups object is a container object also and no configuration is needed here either. For more information refer to Channel Groups topic.
Right click on the Channel Groups object and select New Channel Group. In the Name field, either accept the default name entered or enter a name that will identify this specific Channel Group.
Select SS7_ISUP from the drop down menu in the Signaling Type field. For more information on configuring the remaining fields in this object, refer to the Channel Group topic.
Right click on the SS7 Channel Group created and select New Circuit Group. In the drop down menu of the Node Name field, select the Primary node. This is the node that the first Circuit Group is being configured on.
In the Start Span/Channel: End Span/Channel fields, select the DS-1's and DS-0's that will be used for this circuit group. The selections made here should mimic the selections made in the Configure the SS7 ISUP Group and Circuit Group section above. Refer to the ISDN Circuit Group under Channel Group topic for more information on this object.
Right click on the SS7 Channel Group again and select New Circuit Group. In the drop down menu of the Node Name field, select the Secondary node that the Circuit Group is going to be configured on.
Click on the Channel Groups object which will now have a yellow exclamation point displayed. Click on the Download Resource Tables button and the SS7 Channel Group configuration just created will be sent to the IMG 2020.
Configuring SS7 with a Primary and Remote node along with the CICs and Channel Groups has been achieved. The procedure above describes how to configure the SS7 signaling portion. Depending on the call flow, the routing process, the translation process, and the IP signaling may need to be configured. Refer to the proper sections for information on any other functionality. Below is screen capture displaying the Web GUI Tree pane after configuring the Basic Configuration and the Configure SS7 Redundant Nodes topic.
