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This chapter describes the procedure to configure traffic paths.
A traffic path defines a path along which bearer channels are routed. The signaling network controls the bearer network, so when you set up a traffic path you must provide information for the signaling network control.
The traffic path can be thought of as a logical collection of bearers controlled by the same signaling path, going to the same destination.
SS7 traffic paths require the point code of the originating switch and the circuit interrupt codes (CICs) that identify the circuits carrying the traffic. (CICs and Span IDs are mapped together in the BearChan.dat file.)
To set up the control environment, you must identify your own point code (OPC), adjacent point code (APC), and linksets.
Select a TransPath component in the Sites tab to display the TransPath tabs for that site. The Traffic Paths tab consists of a top portion where you can select a traffic path from a combo-box and a bottom part containing four subtabs.
The subtabs are for general information (which is on top), channels, properties, and IP properties. (See Figure 13-1.)
A traffic path is a set of destinations created independently of signal paths. For non-SS7 protocols, the traffic path merely consists of a tag and a set of bearer channels. For SS7 protocols, the traffic path will also include a DPC, a network indicator, and CICs assigned to bearer channels. A traffic path may be assigned to more than one signal path for SS7 only.
After you create an access server under the Sites tab, you will configure its traffic path. Each access server can be associated with only one traffic path, and each traffic path can be associated with only one access server.
You must select a protocol family to associate with a traffic path. If the protocol is fully associated (that is, ISDNPRI), the traffic path will be a name only. If the protocol is not fully associated, you must enter a DPC, network indicator, name, and description (optional).
At the upper right side is a drop-down list of the TransPath components for the site you are configuring. If you want to work in another TransPath component, you can select it here. You do not have to return to the Sites tab to select a different TransPath component.
The General subtab is highlighted and displays a prompt to select a traffic path from the drop-down list or to add one. (See Figure 13-1.) Here you can add, modify, and delete traffic paths.
When you select a traffic path from the drop-down list, a dialog box displays the protocol family and variant, usage, path name, description, traffic path tag, DPC address, and network indicator for that path if SS7. If DPNSS or ISDNPRI, there is no DPC address or network indicator. (See Figure 13-2.)
When you right-click while you are in a dialog box in the General subtab, a menu appears with two choices:
The only way you can delete a traffic path is from this window while you have a traffic path dialog box open.
Your other list option is to add a traffic path. When you select this option, a dialog box similar to the Traffic Path General dialog box appears and you use the Tab key to move from box to box to make selections or manually enter information.
You select the following parameters:
You enter information in the following fields:
You cannot change to other tabs or subtabs until you click on OK or Cancel.
In the General subtab for an existing traffic path, you can modify the traffic path. You can change anything but the protocol family and variant and the usage in this dialog box.
When the traffic path is modified, OK and Cancel buttons appear; you cannot change tabs or subtabs until you click on OK or Cancel.
The Channels subtab shows the lines for this TransPath component in a list. If the selected Traffic Path has access device usage, the lines defined when the access device was created will be displayed. If the selected Traffic Path usage is not access device, then subscriber lines are shown in a single list.
Only those lines associated with this traffic path are green. Those associated with another traffic path in this TransPath are blue. Those that have no association are yellow. Any lines associated with a different usage are black.
If you right-click on a line, a popup menu appears with current list choices checked. (See Figure 13-3.)
Here you can add and delete bearer channels and set CIC codes (if SS7) and how you want your list to display.
If you select Add Bearer Channel(s), a dialog box appears where you enter a starting CIC code for the range of CIC codes to be assigned to the selected bearer channels.
Step 1 Enter n (where n is an appropriate CIC) and click on OK.
The channel icon turns green to indicate that it is mapped to this traffic path. This assigns the network bearer channels for the selected access device to this path.
Step 2 Add all bearer channels for the other access lines to this traffic path and set the appropriate CIC.
The Properties subtab is where you set up any overrides for your traffic path protocols after you have added all the bearer channels for the access lines to the traffic path and set the CICs.
This subtab displays two lists. The top list show the defaults for the protocol family and variant for this traffic path. (See Figure 13-4.)
If you highlight an entry, the Override button becomes active. If you click on it, the entry is moved to the bottom pane, which contains the overrides for this traffic path. If you highlight an entry in the override list, the Modify and Delete buttons become active. If you click on Delete, the entry disappears. If you click on Modify, a dialog box appears on the right. It shows the property, type, and default value for the override entry. You can change only the default value. Enter the new value and click on Modify to make your change.
If you use the Dial Plan Provisioning (DPP) application, you must override the default protocol settings (both 0) for the subscriber side link set to BOrigStartIndex = 1 and BTermStartIndex = 2 to integrate the DPP with the current Cisco Software Release 4 telephony controller configuration tool configuration.
The IP Properties subtab displays two lists. IP properties are properties associated with IP service on the access device. This is selected when the traffic path is created.
The top list show the defaults for the IP Service family for this traffic path. (See Figure 13-5.)
If you highlight an entry, the Override button becomes active. If you click on it, the entry is moved to the bottom pane, which contains the overrides for this traffic path. If you highlight an entry in the override list, the Modify and Delete buttons become active. If you click on Delete, the entry disappears. If you click on Modify, a dialog box appears on the right. It shows the property, type, and default value for the override entry. You can change only the default value. Enter the new value and click on Modify to make your change.
Posted: Fri Nov 12 16:25:15 PST 1999
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