Technical data

The tty_test utility contains a test server, a test client, and a small terminal application. The test client calls the

test server. When the connection is established, the client starts to generate test frames and to transmit these

frames to the test server. The test server loops the received data back to the transmitter (client). The test client

verifies the received frames based on sequence number and check sum, and generates link statistics. The

tty_test utility is located in the /usr/lib/eicon/divas directory.

tty_test in server mode

The test server can be started with the following commands:

Command Description

tty_test <tty_nr> s <protocol> [-

l<frame_length> -s<rate>]

This command starts a test server on your console. You can see the

messages from the TTY interface and the link statistics generated

by the receiving side.

tty_test <tty_nr> sv <protocol> [-

l<frame_length> -s<rate>]&

This command starts a test server in the background. In this mode,

the test server detaches from your console and does not display

any output. To get information about the test server started in the

background, use the ps x command. To safely stop the test server

running in the background, use the HUP signal (kill -HUP

process_number or killall -HUP tty_test).

Parameters for the tty_test in server mode

Parameter Level Description

tty_nr Mandatory Dialogic

Diva

TTY number that should be used by this test server. It should

range between 1 and N, where N is the sum of B-channels of the Dialogic

Diva

Media Boards installed in the system

protocol Mandatory

Value Description

auto Automatic detection of the B-channel protocol stack.

x75 HDLC/X.75/Transparent. This protocol stack provides reliable data

transfer. V.42bis compression is detected automatically.

x75v42 HDLC/X.75 with V.42bis data compression/Transparent. This protocol is

not used on the server side because x75 automatically detects X.75 with

V.42bis.

v120 HDLC/V.120/Transparent V.120 with V.42bis is possible.

v110 V.110/Transparent/Transparent

mdm Modem with full negotiation/V.42+V.42bis/Transparent.

tty_test utility