9: Line and Tunnel Settings
5.Click Submit.
6.Repeat above steps as desired, according to additional tunnel(s) available on your product.
Tunnel – Modem Emulation
A tunnel in Connect Mode can be initiated using modem commands incoming from the Serial Line. This page enables you to configure the modem emulation settings when you select Modem Emulation as the Tunnel Connect Mode type.
The Modem Emulation Command Mode supports the standard AT command set. For a list of available commands from the serial or Telnet login, enter AT?. Use ATDT, ATD, and ATDP to establish a connection. All of these commands behave like a modem. For commands that are valid but not applicable to the EDS, an “OK” message is sent (but the command is silently ignored).
The EDS attempts to make a Command Mode connection as per the IP/DNS/port numbers defined in Connect Mode. It is possible to override the remote address, as well as the remote port number.
The following table lists and describes the available commands.
Table 9-20 Modem Emulation Commands and Descriptions
Command | Description |
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+++ | Switches to Command Mode if entered from serial port during connection. |
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AT? | Help. |
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ATDT<Address Info> | Establishes the TCP connection to socket (<ipaddress>:<port>). |
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ATDP<Address Info> | See ATDT. |
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ATD | Like ATDT. Dials default Connect Mode remote address and port. |
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ATD<Address Info> | Sets up a TCP connection. A value of 0 begins a command line interface |
| session. |
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ATO | Switches to data mode if connection still exists. Vice versa to '+++'. |
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ATEn | Switches echo in Command Mode (off - 0, on - 1). |
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ATH | Disconnects the network session. |
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ATI | Shows modem information. |
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ATQn | Quiet mode (0 - enable results code, 1 - disable results code.) |
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ATVn | Verbose mode (0 - numeric result codes, 1 - text result codes.) |
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ATXn | Command does nothing and returns OK status. |
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ATUn | Accept unknown commands. (n value of 0 = off. n value of 1 = on.) |
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AT&V | Display current and saved settings. |
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AT&F | Reset settings in NVR to factory defaults. |
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AT&W | Save active settings to NVR. |
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ATZ | Restores the current state from the setup settings. |
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EDS User Guide | 72 |
