I-Tech Company CMS 6R4 Series - Manual (Page 84)

6-20
CMS-6R4 Series - User’s Guide
6.6.3. Connecting to a Serial Port using Direct Connect
The Direct Connect TCP port numbers are as follows:
1. Standard Telnet Connections: When standard Telnet Protocol is used,
the CMS-6R4 will respond to all IACs. TCP port numbers 2101 through
2106 correspond to Serial RS232 Ports 1 through 6 respectively.
2. Raw Socket Mode Connections: When Raw Socket Mode is used, data
is always sent “As Is”, and command echo is always enabled. TCP port
numbers 3101 through 3106 correspond to Serial RS232 Ports 1 through 6
respectively.
When establishing a Direct Connection to RS232 Port "x", the corresponding
TCP port number must be used. If conditions are acceptable (e.g. Target RS232
Port must be free and properly configured), an immediate connection will
be made, with one possible exception; password entry may first be required
depending on current password configuration settings.
Note: When a Direct Connect attempt fails because the RS232 Port is
busy, the call is immediately rejected at the TCP level.
Connection Example
1. Assume that the Direct Connect feature has been enabled at Port 6, and
the "On - No Password" option has been selected. If the CMS-6R4’s IP
address is "1.2.3.4", and you wish to establish a standard Telnet protocol
connection with port 6 (TCP Port Number 2106), then on a UNIX system,
the connect command would be invoked as follows:
$ telnet 1.2.3.4 2106 [Enter]
2. The CMS-6R4 will first send the site ID, Port Number, Port Name,
and Telnet Port number, and then once a connection is established, the
"Connected" message will be sent.