6.16.3 Cause Mapping Tables

Use the Cause Mapping Tables to specify changes in selected causes. By assigning causes to different types of virtual ports you can present identical causes in a different way on the PBX interfaces. To assign a mapping table to a virtual port use the Basic tag for the particular virtual port. You can also specify in which direction the mapping table should be used. One and the same table can be used for different interfaces and both directions at the same time. Hence, an internal caue can be translated into a cause towards the ISDN, SIP or GSM interface and also in the opposite direction.

The menu has two sections. You can add, remove and rename mapping tables to the left. The right-hand section includes two parameters and the mapping table.

  • Name – name of the selected mapping table.

  • Mask stack cause – disable displaying of the original cause in the PBX trace for the whole mapping table. In that case, the trace displays Type: None. 

Mapping Table

The context menu helps you add, remove and remove all rows of the table. The table consists of twelve columns and an unlimited number of rows. The sequence of rows is irrelevant unless there are two rows with an identical cause and different settings. In that case, the earlier-added row is applied (the one higher in the configuration).

  • Cause – choose one of the pre-defined PBX causes. Here user causes are applied.
  • Mask – disable displaying of the original cause in the PBX trace for a selected mapping table row.
  • Q.850 value – enter the particular cause value according to Q.850 to be assigned to the cause in the given row.
  • Valid – enable translation for an ISDN stack.

  • Q.850 location – define the Location value to be used in DSS1 for specification of the network or user from which the cause is coming. For the acceptable values see the table below. 

    Decimal value

    Meaning

    0

    User

    1

    Private network serving the local user

    2

    Public network serving the local user

    3

    Transit network

    4

    Public network serving the remote user

    5

    Private network serving the remote user

    7

    International network

    10

    Network beyond interworking point

  • Test – this option relates to column Q.850 loc and is used in the inbound direction (Stack to CP). If it is not checked off, column Q.850 loc need not match and the row is recognised according to Q.850 val. If it is checked off, both the values have to match.
  • Set – this option relates to column Q.850 loc and is used in the outbound direction (CP to Stack). If it is not checked off, column Q.850 val is and column Q.850 loc is not included in the outgoing message. Otherwise, the message includes both the values.
  • GSM type – define the GSM message type.
  • GSM value – enter a GSM cause value to be assigned to the cause in the given row.
  • Valid – enable translation for a GSM stack.
  • SIP value – choose one of the available causes for the given row.
  • Valid – enable translation for a SIP stack.