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8: Setup Mode: Channel Configuration
XPress DR+ User Guide 56
To enable the hostlist:
1. Enter a Connect Mode of 0x20 (2X), where X is any digit. 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. The range
is 1-15, with the default set to 3.
5. For Retrytimeout, enter the number of seconds the unit should wait before failing an
attempted connection. The time is stored as units of milliseconds in the range of
1-65535. The default setting is 250.
d) Datagram Type
Directed UDP
When selecting this option, you are prompted for the Datagram type.
Enter 01 for directed or broadcast UDP.
When the UDP option is in effect, the unit never attempts to initiate a
TCP connection because it uses UDP datagrams to send and receive
data.
e) Modem Mode
In Modem (Emulation) 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
XPress DR+ units, and to use an Ethernet connection instead of a phone call. By not
having to change communications applications, you avoid potentially expensive phone
calls.
To select Modem Mode, set the Connect Mode to C6 (no echo), D6 (echo with full
verbose), D7 (echo with numeric response), CF (modem responses only, numeric
response), or CE (modem responses only, full verbose).
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), D7 (echo with numeric response, CF
(modem responses only, numeric response), or CE (modem responses only, full
verbose).