AudioCodes Mediant 800B User Manual page 537

Gateway & e-sbc

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In other words, it lets you change the originally received ISDN cause code to a different

ISDN cause code. For example, the PSTN may indicate disconnected calls (hang up) by

sending cause code 127. However, you can change the cause code to 16, which is a more

typical cause code for such call scenarios. When the device receives an ISDN cause code

from the PSTN side, it searches the table for a matching ISDN cause code. If found, the

device changes the cause code to the corresponding ISDN cause code. If the ISDN cause

code is not configured in the table, the originally received ISDN cause code is used. If the

new ISDN cause code also appears in the Release Cause Mapping ISDN to SIP table (see

'Configuring ISDN-to-SIP Release Cause Mapping' on page 533), the device maps it to the

corresponding SIP response code, which it sends to the IP side.

Cause ISDN to ISDN table and the Release Cause Mapping ISDN to SIP table, the

mapping rule with the originally received code in the Release Cause Mapping ISDN to

SIP table is ignored; the device uses only the mapping rule in the Release Cause

Mapping ISDN to SIP table that matches the new ISDN cause code. For example, if

you configure a mapping rule in the Release Cause ISDN to ISDN table to change a

received 127 code to 16, the device searches for a rule in the Release Cause

Mapping ISDN to SIP table for an ISDN code of 16 (ignoring any entry with code

The following procedure describes how to configure ISDN-to-ISDN release cause mapping

through the Web interface. You can also configure it through ini file (CauseMapIsdn2Isdn)

or CLI (configure voip > gateway manipulation cause-map-isdn2isdn).

To configure a ISDN-to-ISDN release cause mapping rule:

Open the Release Cause Mapping from ISDN to ISDN table (Setup menu >

Signaling & Media tab > Gateway folder > Manipulation > Release Cause ISDN >

Click New; the following dialog box appears:

Figure 24-8: Release Cause ISDN to ISDN Table - Add Dialog Box

Configure a mapping rule according to the parameters described in the table below.

Click Apply.

Table 24-12: Release Cause Mapping ISDN to ISDN Table Parameter Descriptions

[CauseMapIsdn2Isdn_Index]

If the originally received ISDN cause code is configured in both the Release

Defines an index number for the new table row.

Note: Each row must be configured with a unique

Mediant 800B Gateway & E-SBC

24. Manipulation