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Chapter 5 – Network-to-Serial Connectivity Using Dialout

Command Line Interface and Application Examples for Multi-Tech Systems, Inc. IP Modules (S000368F) 75

Scenario 5 – Auto Dialout Using UDP

In this scenario, the Auto Dial-out session in UDP mode is initiated by an external UDP Client.

The UDP Client can send/receive data to/from the UDPServer residing at the IPModule.

UDP client

PPP

IPModule

serial

device

192.168.2.210

sends to

192.168.2.1 5000

UDP Server (5000)

192.168.2.1

Notes:

• At any given point of time, only one UDP Client can send/receive data from the serial-device through the IP

Module.

• ONLY on a termination of the first UDP-Client (See the chapter on Serial-to-Network Connectivity Using

Dialout" section for UDP session termination) the second UDP-Client can initiate a session with the UDP

Server residing at the IP Module.

• Authentication is NOT supported for the UDP Dialout feature.

• # set serial s0 raw-mode <enable/disable> is NOT applicable for the UDP Auto-dialout feature.

Commands to Setup UDP Dial-out in the Module

# set ip auto-dialout enable

# set serial s0 auto-dialout enable

# set serial s0 auto-dialout-port 5000

# set serial s0 auto-dialout-protocol udp/all

# set serial s0 baud-rate 115200

# set serial s0 data-bits 8

# set serial s0 parity none

# set serial s0 stop-bits 1

# set serial s0 flow-control rts-cts

# set serial s0 dialout-monitor dtr

# set ip udp udp-inactivity enable/disable

# set ip udp udp-inactivity-timeout t

# set ip udp udp-terminate-monitor enable/disable

# set ip udp udp-terminate-string <string>

# save

Functionality

When any UDP client connects to the IP Module to the configured port, the IP Module locks the serial port for that

UDP-Client and latches to the UDP client address connected. The UDP-Client is now ready to send/receive data

to/from the serial device.

How to Terminate the UDP-Dialout Session

1. If the “inactivity” is enabled and the timeout value is configured, the active UDP session will be terminated

on the expiry of inactive timeout.

2. If the “terminate-monitor” is enabled, the UDP-Client can terminate the session by sending the terminate-

string configured in the IPModule.

3. If both “inactivity” and “terminate-monitor” are enabled, the UDP dialout session is terminated when

either of the above two events occurs first.

4. When the “dialout-monitor” is set to dtr, toggling the DTR signal state terminates the UDP-dialout session.

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