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Dialogic

System Release 6.0 PCI for Windows

Release Update, Rev 62 — January 30, 2008 69

Dialogic Corporation

1.11 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( ). For

instance, its adjustment affects the threshold for silence termination conditions in the R4

API TPT structure. It also affects silence detection via R4 unsolicited Standard Runtime

Library (SRL) events.

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.

1.12 Support for PCI Express Boards - Dialogic

Station

Interface Boards

With the Service Update, Dialogic

System Release 6.0 PCI for Windows

now supports

the following Dialogic

Station Interface Boards in the PCI Express form factor:

Dialogic

DISI16-EW Switching Board

Provides connectivity for up to 16 station interfaces in a single, full-length PCI Express

slot. Includes conferencing, voice play/record, tone detection and generation, and

caller ID capabilities.

Dialogic

DISI24-EW Switching Board

Provides connectivity for up to 24 station interfaces in a single, full-length PCI Express

slot. Includes conferencing, voice play/record, tone detection and generation, and

caller ID capabilities.