Telnet Interface (Uc Diag Only); Table 8-1: Telnet Negotiation Example; Figure 8-1: Telnet Interface - Focal 922-DSLH User Manual

8.0 Telnet Interface (uC DIAG Only)

The 922-DSLH card implements a Telnet server on port 23. The server can be accessed from a PC-based
Telnet client such as Microsoft Telnet Client
has been established, the Telnet interface displays a home screen containing a list of the available commands
and also detailed help on using each command.
Typically the Telnet interface is used for convenient configuration of the TCP/IP settings of the card.
The commands available in the Telnet interface are shown in the figure below; detailed help for each command
is available from the Telnet menu.
Telnet Session Negotiation
Normally, when a PC-based Telnet client such Microsoft Telnet Client
session with the 922 card's Telnet server, the Telnet client automatically responds to the server's negotiation
options without further user interaction and a Telnet session can be open without problems.
For cases in which a PC-based Telnet client is not used, the user must ensure that the client responds to the
server's negotiation options. The table below shows the typical negotiation options offered by the card's Telnet
server and the responses that the client should provide in order to open a session.
Source IAC
0xFF
Card Server 0xFF
0xFF
0xFF
Client 0xFF
0xFF
Client data in a single Ethernet frame  FF FB 03 FF FC 01 FF FD 01 = Will - Suppress Go Ahead, Won't
- Echo, Do - Echo
Focal Technologies Corporation
A Moog Inc. Company
or Tera Term by entering the card's IP address. Once a connection
TM

Figure 8-1: Telnet Interface

Table 8-1: Telnet Negotiation Example

Sub cmd
Command
Option
0xFD 0x03
0xFE 0x01
0xFB 0x01
0xFB 0x03
0xFC 0x01
0xFD 0x01
Model 922-DSLH – User Manual
TM
or Tera Term is used to open a
Notes
Do Suppress Go Ahead
Don't Echo
Will Echo
Will Suppress Go Ahead
Won't Echo
Do Echo
Document No. 922-0677-00, Rev 1.0
Page 8-1