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Call_Routing

After the verification of the signaling on E1 interfaces, the next step is to adjust call routing parameters within the system. This is necessary to route calls from one interface to another.

The advanced routing algorithm within the Stillink systems is carried out in four steps:

  • First Step: Incoming A-Party Analysis
  • Second Step: B-Party (called-party) Pre-Analysis
  • Third Step: B-Party (called-party) Main Analysis
  • Fourth Step: Outgoing A-Party Analysis

In most of the cases, the third step, which is the Main Analysis is sufficient to establish successful signaling conversions.

Transparent call routing (for beginners)

1:1 (one-to-one), or transparent call conversion may be achieved easily with using the Main analysis only. Assume that you have already set the E1-00 as SS7 and E1-01 as ISDN DSS1 NT

  • In Homepage, click on Users/Find item.
  • Select to edit page is displayed. For E1-00, edit 50000 into the textbox.
  • Click on Common button. Common properties page is displayed.
  • Assign a routing table using Routing criteria table selector. Assume that 10 is assigned.
  • Using the Channelstatus link in Common properties page, go to the page showing all the voice channels from 1 -31 for this E1-00. Select Channel 1 and then click on Edit button
  • Channel properties of the voice channel 1 in E1-00 appears.
  • Edit a route number for this voice channel into the Used in route textbox. Assume that 10 is edited. Then click on OK button.
  • Repeat the same for all the other voice channels or if you click Apply button of Apply to all channels, all channels sets to route 10
  • WHAT IS DONE for E1-00? Its routing table is set to 10, and its route number is set to 10 for all of its voice channels

Similarly, in order to set routing parameters of the E1-01:

  • In Homepage, click on Users item.
  • Select to edit page is displayed. For E1-01, edit 50100 into the textbox..
  • Click on Common button. Common properties page is displayed. Assign a routing table using Routing criteria table selector. Assume that 11 is assigned.
  • Using the Channelstatus link, go to the page showing all the voice channels from 1 -31 for this E1-01. Select Channel 1 and then click on Edit button
  • Channel properties of the voice channel 1 in E1-01 appears. Edit a route number for this voice channel into the Used in route textbox.. Assume that 11 is edited. Then click on OK button. Repeat the same for all the other voice channels or click Apply button of Apply to all channels, all channels sets to route 11

WHAT IS DONE for E1-01? Its routing table is set to 11, and its route number is set to 11 for all of its voice channels.

The next step is to fill out the routing tables 10 and 11. Start with programming the routing table 10.

  • In Homepage click on Routing/Table item.
  • Select to edit page is displayed.
  • Select Routing criteria table 10 and click on OK button. The table 10 is displayed.
  • Click on Add button to start editing an empty table. Mark the first row all with entries 0 and then click on Edit button
  • Routing criteria for this entry is displayed.
  • Click Unused button of Number of used law, Edit the Prefix as a single 0, Min as 3, Max as 31, Law action as R11 (route 11) , Required authorization - Day as 1, Required authorization - Night as 1.
  • Click on OK button.
  • Routing criteria table 10 is displayed with this new entry.
  • Then click on Add button again.
  • Mark the new row with all zeros and then click on Edit button.
  • Routing criteria for this entry is displayed.
  • Edit Number of used Law as 164, then click on OK button
  • The page will refresh
  • Then edit the Prefix as a single 1, Min as 3, Max as 31,
  • Note that Law action as R11 (route 11) , Required authorization - Day as 1, Required authorization - Night as 1 will be automatically set when Number of used Law is selected as 164
  • Click on OK button.
  • Routing criteria table 10 is displayed with this new entry.
  • Repeat the same procedures to add prefixes 2,3,4,5,6,7,8,9 in to the Routing criteria

table 10.

  • At the end, the Routing criteria table 10 looks like below.

WHAT IS DONE for routing table 10? If any call with any called party address (minimum 3 digit and maximum 31 digit long) is received from an interface using this table, this call will be routed to the Port Route 11.

Next is to program the Routing criteria table 11.

  • In Homepage, click on Routing/Copy
  • Select source 10, Destination 11 and click on OK button
  • Click Routing/Table, select Routing criteria table 11 and press OK button.
  • Edit the Prefix as a single 0
  • Click Unused button of Number of used law, Required authorization - Day as 1, Required authorization - Night as 1, Law action as R10 (route 10)
  • Note that Law action as R10 (route 10) , Required authorization - Day as 1, Required authorization - Night as 1 will be automatically set when Number of used Law is selected as 165

At the end of programming, the Routing criteria table 11 will look like below.

WHAT IS DONE for routing table 11? If any call with any called party address (minimum 3 digit and maximum 31 digit long) is received from an interface using this table, this call will be routed to the Port Route 010

Summary for this sample programming:

  • E1-00, that is SS no:7 ISUP signaling E1 interface with the access code 50000, is programmed such that
  • it uses the Routing Table 10.
  • all of its voice channels are set to Port Route 10.
  • E1-01, that is ISDN DSS1 Primary rate NT interface signaling E1 interface with the access code 50100, is programmed such that
  • it uses Routing Table 11.
  • all of its voice channels are set to Port Route 11.
  • Routing Table 10 routes all incoming calls to the Port Route 11
  • Routing Table 11 routes all incoming calls to the Port Route 10

Result with this sample programming:

  • Any incoming call with any called party address (minimum 3 digit and maximum 31 digit long) to the E1-00 is routed to the E1-01.
  • Any incoming call with any called party address (minimum 3 digit and maximum 31 digit long) to the E1-01 is routed to the E1-00.

The above mentioned programming takes only several minutes after understanding the logic behind the routing algorithms in Stillink systems. For further information, read the routing sections of the online help system.

Tips

Min and Max fields refer to minimum and maximum number of digits required prior to the conversion analysis. These fields may take values between 0 and 31. The analysis does not start before receiving the Min number of digits. If the entry in the Max field is greater than or equal to that of the Min field, the Stillink

  • starts the main analysis after receiving the Min number of digits and
  • routes the call immediately after the receipt of Max number of digits or the time-out occurrence.
  • Min and Max numbers should be selected carefully for a proper call routing (conversion).

Routing criteria tables, Law actions, and Number of used Laws are common and unique within the same Stillink system. In other words, there is only one Number of used Law 164 in a system, which can be used by a single interface or shared by many other interfaces. So that, when creating or modifying Routing criteria tables, Law actions, and Number of used Laws, BE SURE that is not used by some other interfaces and modifications will not have an effect on other interfaces, which are already under the operation.

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Page last modified on October 27, 2010, at 03:07 AM EST
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