Multitech MultiConnect Adapter Betriebsanweisung PDF herunterladen (Seite 89)

Chapter 7 – Modem (Transparent) Mode

Command Line Interface and Application Examples for Multi-Tech Systems, Inc. IP Modules (S000368F) 89

Scenario 2 – Serial Tunneling in Transparent

Mode

In this scenario, two IP modules in transparent mode aid in the communication between two serial devices that are

connected to the RS-232 interface (s0) of the IP modules. Serial tunneling is achieved in the transparent mode where

raw data is communicated.

Serial Tunneling in Transparent Mode

Commands for IP Module - 1 (Dialing End)

# set operation-mode modem-normal

# set serial s0 escape-monitor enable

# set serial s0 escape-string "+++inets0"

# set serial s0 stop-bits 1

# set serial s0 baud-rate 115200

# set serial s0 data-bits 8

# set serial s0 parity none

# set serial s0 flow-control rts-cts

# set serial s1 stop-bits 1

# set serial s1 baud-rate 115200

# set serial s1 data-bits 8

# set serial s1 parity none

# set serial s1 flow-control rts-cts

# save

Commands for IP Module - 2 (Answering End)

# set operation-mode modem-normal

# set serial s0 escape-monitor enable

# set serial s0 escape-string "+++inets0"

# 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 s1 baud-rate 115200

# set serial s1 data-bits 8

# set serial s1 parity none

# set serial s1 stop-bits 1

# set serial s1 flow-control rts-cts

# save

Steps for Establishing a Physical Link in Transparent Mode

1. Complete the configuration listed above.

2. At the dialing end, invoke the following commands: atz, at&f, atdt <dial no>

3. Once the physical connection is up, the data channel between the two IP modules is established. Note:

Only raw data is forwarded between the modules, and no data integrity check is provided.

4. Type +++ followed by ATH0 to hangup the modem.

Notes

• You can switch from Data mode to Command mode using the escape-monitor-string command. The

Command mode transfers the control to the Command Shell of the IP module.

• You can switch from Command mode to Data mode using the restore session command.

• The data session is dropped if the physical link goes down.

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