Table of Contents
Advertisement
External PAD Settings
• PAD Mode
Select button to set the PAD mode of the modem as a Server or Client. In Client mode, the modem will initiate an
outbound connection to the Remote Host IP Address with the Outgoing Port based on the selected DTR setting. In
Server mode, the modem will accept one incoming connection on the specified Incoming Port. The modem will not
accept multiple incoming connections at the same time – additional connections are arbitrated based on the Server
Session Closed On and Timeout parameters. Note: It is possible to override Server mode and make an outgoing
client connection using the RS-232 command set.
atd*xxx.xxx.xxx.xxx:yyyyy – When in server mode, and no connection is active, the atd* command (followed by an
IP address) can be issued to initiate an outbound client connection to the specified IP address and port as specified
after the colon. If no port is specified, the port number used is the Outgoing Port parameter. To hang-up such a
connection, 3 '+' characters must be inserted into the outgoing stream ("+++"). The modem will return to command
mode once it has seen the "+++" and respond with OK. The connection can then be broken by entering "ath". The
modem will return to server mode. Such a client connection can be repeated again as necessary, as long as each
connection is hung-up before a new one is made.
Additional note: The modem is capable of only 1 PAD connection at a time. When a manual client connection is in
progress (atd*xxx.xxx.xxx.xxx), a connection attempt by an incoming client may result in the disabling of the PAD
function until the next device reset.
• Pad Protocol
Sets the data protocol of the PAD to TCP or UDP data. If you have set PAD Mode as server you can choose either to
support either type of client.
• Incoming Friendly IP Address
Sets the IP address of the device using the PAD functionality.
• Server Session Closed On
This is only available if PAD mode is Server. This option selects under which condition the server will terminate an
established connection.
New Client: If a different client attempts to connect, it will be successful and the current client will be forcibly
disconnected, without any warning. Otherwise, the current client remains connected indefinitely.
Timeout: A new client will be accepted only after a specified timeout. The duration of the timeout is specified by the
Inactivity timeout, or the Hard timeout, or a combination of both.
The default value is New Client.
• Server Inactivity Timeout
Time after which the current connection with Client will be terminated without warning. This time starts over again
each time the Client sends data to the server. This parameter is ignored if the session closes on New Client. If PAD
protocol is tcp, the timeout is specified in minutes. If UDP, the timeout is specified in seconds. The valid range for
either is 1-65535. 0 will disable this timer.
If both Inactivity Timeout and Hard Timeout are enabled, (neither is 0), then a client session will be terminated
when either timeout is met. In this case, the value for Hard Timeout must exceed the value for Inactivity Timeout. If
the Inactivity Timeout is met, the client will be terminated. If the Hard Timeout is exceeded without meeting the
Inactivity Timeout, the client will be terminated by the Hard Timeout.
Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B
| Page 65
Advertisement
Table of Contents
