Technical data

73
Global Dialogic® Diva® TTY configuration options
Global Dialogic
®
Diva
®
TTY configuration options allow you to overwrite the parameters passed by the application
and to control parameters running on the Dialogic
®
Diva
®
Media Board's fax protocols. This provides a high level
of flexibility, especially if the application does not provide the required parameters.
TTY configuration options
Option Description
Default initialization string This AT command is used to initialize the TTY interface when the application
opens this interface. This process is hidden from the application and can be
used for compatibility with applications that cannot provide the required TTY-
interface initialization.
Enable ECM for FAX CLASS 2 Use ECM, MR, MMR T.6 if supported by the opposite side. The Dialogic
®
Diva
®
Media Board handles the conversion between MR/MMR (MMR/MR) compressed
data transparent to the application.
Enable V.34 (33600) fax for
FAX CLASS 2
Use V.34 (33600) fax if supported by the opposite side. V.34 connections are
handled transparent to the application. They are indicated to the application as
V.17 (14400) connections.
Enable SEP/SUB/PWD for
FAX CLASS 2
Activate support for sub-addressing (SUB), polled document selection (SUB)
and document password protection (PWD). Note that this option will increase
fax connection time and should only be used if necessary.
Every profile see "Supported TTY profiles" on page 68 has its own service/additional service indicator that
enables the appropriate selection of Bearer Capabilities (BC) and Low-Layer Compatibility elements for the
SETUP message. These indicators are used to filter incoming calls and to tell the remote site which kind of
connection the user wants to establish for outgoing calls.
To change these default values for outgoing calls, use the AT commands AT+iS (specify service/add service
indicator) or AT+iU (specify BC/LLC values). See AT-command set on page 49 for more information on the AT
commands.
Call parameter (BC/LLC) selection