Lantronix SecureBox SDS1100 User Manual page 39

SDS1100 User Guide
To use this ability, follow these steps:
1. To enable the hostlist, enter a Connect Mode of 0x20 (2X). The menu shows you
a list of current entries already defined in the product.
2. To delete, modify, or add an entry, select Yes. If you enter an IP address of
0.0.0.0, that entry and all others after it are deleted.
3. After completing the hostlist, repeat the previous step if necessary to edit the
hostlist again.
4. For Retrycounter, enter the number of times the Lantronix unit should try to make
a good network connection to a hostlist entry that it has successfully ARPed.
5. For Retrytimeout, enter the number of seconds the unit should wait before failing
an attempted connection.
Modem (Emulation) Mode: In Modem Mode, the unit presents a modem interface
to the attached serial device. It accepts AT-style modem commands, and handles the
modem signals correctly.
Normally there is a modem connected to a local PC and a modem connected to a
remote machine. A user must dial from the local PC to the remote machine,
accumulating phone charges for each connection. Modem Mode allows you to
replace modems with SDS1100s, and to use an Ethernet connection instead of a
phone call, without having to change communications applications and make
potentially expensive phone calls.
To select Modem Mode, set the Connect Mode to C6 (no echo), D6 (echo with full
verbose), or D7 (echo with 1-character response).
Note: If the unit is in Modem Mode and the serial port is idle, the unit can
still accept network TCP connections to the serial port if Connect Mode is set
to C6 (no echo), D6 (echo with full verbose), or D7 (echo with 1-character
response).
In Modem Mode, echo refers to the echo of all of the characters entered in command
mode; it does not mean to echo data that is transferred. Quiet Mode (no echo) refers
to the modem not sending an answer to the commands received (or displaying what
was typed).
To disconnect a connection using Modem Mode commands:
There must be 1-second guardtime (no data traffic) before sending +++.
There must not be a break longer that 1 second between +s.
There must be another 1-second guardtime after the last + is sent.
The unit acknowledges with an OK to indicate that it is in command mode.
Enter ATH and press Enter. It is echoed if echo is enabled. ATH is
acknowledged by another OK.
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3: Configuring the Unit