User`s guide

Dialogic

System Release 6.0 PCI for Windows

Release Update, Rev 62 — January 30, 2008 73

Dialogic Corporation

1.14 Support for Dialogic

D/4PCI Voice Board

With the Service Update, the Dialogic

D/4PCI Voice Board that was supported in older

system releases is now supported in Dialogic

System Release 6.0 PCI for Windows

The D/4PCI Board has 4 voice channels (analog) and does not have CT Bus capabilities.

If present in the system, the D/4PCI Board will be detected and displayed in the Dialogic

Configuration Manager (DCM). Its default firmware file cannot be changed or configured.

For information about using DCM to configure and download Dialogic

Springware

Boards, see the Dialogic

Springware Architecture Products on Windows

Configuration

Guide.

1.15 New Parameter for Adjusting Silence Threshold on

Dialogic

DM3 Boards

With the Service Update, the user has the ability to adjust the silence threshold parameter

on Dialogic

DM3 Boards to a value above or below the default value of -43 dBm0 while

using play and record functions like dx_play( ), dx_record( ), and ec_reciottdata( ).

The silence threshold is the level that defines whether the incoming data to a voice

channel is recognized as silence or non-silence. The threshold is defined by the minimum

energy level of a signal below which it is considered as silence. With this new feature, the

user can statically adjust the silence threshold default value of -43 dBm0 via the DM3

firmware configuration file across all voice channels on a DM3 Board.

Configuration Example

To change the default value of the silence threshold, you must add a new parameter in the

CONFIG file that was selected for your board. The parameter is 0x70B, and must be

added in the [sigDet] section of the CONFIG file. A value equal to the desired silence

threshold, measured in dBm0, must be entered. For example:

[sigDet]

SetParm=0x70B, 0xffd3 ! SD_ParmMinEnergy in dBm0 (e.g. 0xffd3=-45, 0xffda=-38,

Default: 0xffd5=-43)

After the CONFIG file is saved, the changes take effect after downloading.

For further information about modifying DM3 CONFIG files, see the Dialogic

DM3

Architecture PCI Products on Windows

Configuration Guide.