User`s guide

Dialogic
®
System Release 6.0 PCI for Windows
®
Release Update, Rev 62 — January 30, 2008 138
Dialogic Corporation
1.43.1 Supported Products
The line adaptation utility (LineAdapt) is supported on the following analog front-end
boards.
Springware Boards:
• Dialogic
®
D/41JCT-LS Media Boards (North American version)
• Dialogic
®
D/120JCT-LS Rev. 2 Media Boards (North American version)
DM3 Boards:
• Dialogic
®
DMV160LP Media Boards (but not the Dialogic
®
DMV160LPHIZ high
impedance, or HiZ version)
• Dialogic
®
DI0408LSAR2 Switching Boards (this is the Rev. 2 version)
1.43.2 Feature Description
The line adaptation utility is a configuration utility for tuning the impedance level on analog
front-ends to reduce transmitter side line echo due to degraded analog telephone lines
that deviate from their designed impedance range. (Some impedance deviation is present
in all analog telephone lines.) The utility helps to correct trunk environments where the
analog telephone line and the analog board front end impedance do not conform. In some
extreme cases, this situation can cause a transmitter side line echo that disrupts
perceived voice quality and triggers DTMF termination events. The utility normalizes the
impedance mismatch by discovering the optimum settings for individual channels or ports
on the analog board and initializing the board to use the optimum settings.
1.43.3 Line Adaptation Utility Overview
Line adaptation consists of running the host-based LineAdapt utility to discover and store
the optimum impedance settings for individual channels on analog boards that are
connected to analog telephone lines. The stored settings are then used whenever the
boards are downloaded, such as at system startup when the Dialogic
®
System Services
are started on the boards.
Therefore, the line adaptation process consists of the following parts:
• Configuration: Discovery and storage of optimum settings (typically performed once)
• Initialization: Using the stored optimum settings at startup (performed whenever the
boards are downloaded or initialized)
Line adaptation procedures and related information are described in Section 1.43.4, “Line
Adaptation Procedures”, on page 139.
The command line interface for the utility is documented in Section 1.43.5, “LineAdapt
Utility Command Line Interface”, on page 145.