Cisco ICM Enterprise Edition SS7
Gateway Configuration Tool User
Guide
ICM Enterprise Edition Release 6.0(0)
May 2004
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Cisco ICM Enterprise Edition SS7 Gateway Configuration Tool User Guide
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The Signaling System 7 (SS7) Gateway Configuration Tool (SS7Cfg) provides the
interface to customize the SS7 gateway for a particular network installation. This
tool is provided as a separate utility from the Intelligent Contact Management
(ICM) setup since it requires specific knowledge of SS7 networks, nomenclature,
and concepts. Therefore, the gateway will be setup initially with the ICM setup,
but will require subsequent configuration utilizing SS7Cfg, usually performed by
a carrier network specialist.
An important feature of SS7Cfg is that you can remotely edit and maintain regedit
files (*.reg) that can then be imported to and exported from the NT Registry with
the Windows regedit utility, without involving the ICM gateway site.
NoteDo not use files exported from Regedt32 because they use a different format for
exported registry files that is incompatible with the format for regedit files.
Upon opening or saving an SS7 configuration Registry file, any configuration
problems are flagged by displaying a dialog box which indicates what the problem
is, and asks if you want to continue loading/saving the new configuration file. In
this way, SS7Cfg attempts to enforce the use of consistent configuration
information.
SS7Cfg was designed as a Windows Explorer-type application providing
context-sensitive shortcut menus that display after right-clicking an option.
This tool supports several different gateway types, including AIN, INAP, and
Concert, which are all very similar. The only difference between these gateways
is the way some of the parameters are configured in the application layer.
Before Using SS7Cfg
Before working with SS7Cfg, you should familiarize yourself with the setup and
configuration of Cisco ICM software. You should also plan out the point codes,
subsystem numbers, adjacent connection point codes, and routing point codes for
the gateways you want to configure.
NoteImportant! A gateway must be installed before using SS7Cfg. Configure the
gateway by running ICM Setup and click the Network Gateway button in the
ICM Component Selection window.
For more information about ICM setup and configuration, see the Cisco ICM Software Installation Guide and the Cisco ICM Software Configuration Guide.
Chapter 1 Introduction
Terminology
The following terms are used throughout this guide:
• Local Point Code (LPC). Point code of SS7 gateway within the SS7
network.
Chapter 1 Introduction
Terminology
• Message Transfer Part 2 (MTP2). Provides link-layer functionality with
such capabilities as error-checking, flow control, and sequence checking.
• Message Transfer Part 3 (MTP3). Extends the functionality of MTP2 to
provide network layer functionality with such capabilities as node
addressing, routing, alternate routing, and congestion control.
• Network Interface Controller (NIC). A process within the ICM system that
communicates directly with the carrier’s signaling network. The NIC reads
call routing requests from the network and transfers them to the ICM’s
Central Controller. Subsequently, the NIC passes a routing label from the
Central Controller to the carrier signaling network.
• Point Code (PC). Numeric value that defines the unique ID of an element in
an SS7 network
• Remote Point Code (RPC). Identifies the signaling point where all links in
a linkset are directly connected.
• Signaling Connection Control Part (SCCP). SCCP provides two major
functions:
–
Addresses applications within a signaling point.
–
Performs incremental routing using a capability called Global Title
Translation (GTT), which frees originating signaling points from the
burden of having to know every potential destination to which they might
have to route a message.
• Service Control Point (SCP). Node (computer) in the carrier signaling
network. ICM software functions as a SCP in networks where the SS7Cfg
configuration tool is used.
• Signaling Link Code (SLC). Defines and numbers the links used in a linkset.
• Signaling System 7 (SS7). A standard network interface used by carriers to
interconnect switches and some peripherals.
• Service Switching Point (SSP). End-switching office in an Intelligent
Network (IN).
• Signal Transfer Point (STP). Routing and interconnection point for SS7
traffic.
• Transaction Capabilities Application Part (TCAP). Defines the messages
and protocol used to communicate between applications (deployed as
subsystems) in nodes.
NoteThe example exercise configures the network interface from the bottom up, which
CHA P T E R
2
Using SS7Cfg to Configure Your
Gateway
For the purposes of this exercise, the following sample network configuration will
be used to set up an SS7 Generic (ITU) gateway using SS7Cfg.
is consistent with the way SS7Cfg was defined. (Notice that only Gateway 1 will
be configured in this example.)
In Figure 2-1, Gateway 1 has four links connecting to two different Signal
Transfer Points (STPs). Each STP is connected by two links combined into a
linkset. Gateway 1 has a point code of 150 and is connected to two STPs with
point codes of 10 and 11. Behind the STPs are two Service Switching Points
(SSPs) at point codes 200 and 201.
• INAP (ITU): Used mostly for existing European installations
• AIN (ANSI): Used for U.S. IN installations
• CRP (ITU): Used for Concert (U.K.) installations
• CRP (ANSI/AT&T): Used for U.S. AT&T installations
• SS7 Generic (ITU): Used for new ECM NICs (Extensible Call
Model/Network Interface Controller) installations
• SS7 Generic (TTC): Used for Japanese installations
Working in the Main Window
Step 3For this exercise, select the SS7 Generic (ITU) gateway as the gateway type to
configure and then click Continue.
NoteThe other gateway configurations are nearly identical to the SS7 Generic (ITU)
gateway.
Working in the Main Window
The SS7Cfg configuration tool presents the network configuration in a familiar
Explorer-type interface. The main window displays a tree structure of the SS7
stack layers you can configure, including MTP2, MTP3, SCCP, and the Session.
You can expand each layer by clicking the plus (+) sign.
NoteThe TCAP layer does not have configuration information in the Generic models.
For architectural reasons, the configuration of the TCAP and the INAP layers is
done on the NIC, and not on the gateway for these gateway types.
Notice that the title bar displays “Untitled.” After you finish editing the
configuration, you need to save it as a Registry file by selecting File > Save As
from the menu bar (see the “Saving the Configuration” section). The title bar then
changes to reflect the saved file name. Alternatively, you can write the
configuration directly to the Registry, provided you have installed the correct
gateway type using Setup.exe.
NoteYou can save the file at any time during the configuration process, but an error
message will display stating that the configuration process is not finished.
To edit configuration information, simply right-click a layer you want to edit and
select an option from the pop-up menu.
The following sections describe how to configure each SS7 stack layer.