105
W&T Mode TCP client
Subject to error and alteration
12�1�4 Deactivating TCP client mode
Set the following parameters in the menu branch SETUP Port
x r TCP/IP Mode r TCP Client to a value of 0 and save this
change:
... r Server Port
... r Special Options r Client: „C“+Addr
Alternately you may use the function SETUP Port x r Port Sta-
te r Clear Port Mode. The Connection State in the Submenu
SETUP Port x r Port State must then be named FREE.
12�1�5 Application:
Client/Server mode between Com-Server-Ports
There are various ways of connecting two or more Com-Server
ports together in this mode. All involved Com-Server ports
must be configured for TCP client mode and may then alter-
nately connect to each other when there are data on the serial
port. After the data has been send the connection is closed
either by the Inactivity Timeout or the Disconnect Character.
When the clients have changing IP addresses, for example in
the case of connections via DSL routers with NAT, alternating
operation of the Com-Servers in TCP client mode can also be
used as an alternative to Box-to-Box mode. Under Server IP/
URL the host name of the counterpart is used instead of the
numerical IP address. In this case the Com-Server obtains the
current IP address first via DNS before the TCP connection
is opened. Updating of the DNS system when there is an IP
address change must be done by the DSL router itself or
by another component with appropriate client service (e.g.
DynDNS).
Serial addressing (Parameter Client: „C“+Addr) also makes
changing connections between multiple Com-Server ports
possible. In this case the addressing must be generated by
the serial devices.
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