Perle Systems TS2 Manual Do Utilizador

 99

Serial Port Profiles

 (Vmodem) is a feature of the IOLAN that provides a modem interface to a serial 

device. It will respond to AT commands and provide signals in the same way that a serially attached 
modem would. This feature is typically used when you are replacing dial-up modems with the 
IOLAN in order to provide Ethernet network connectivity.

The serial port will behave in exactly the same fashion as it would if it were connected to a modem. 
Using AT commands, it can configure the modem and the issue a dial-out request (ATTD). The 
IOLAN will then translate the dial request into a TCP connection and data will be begin to flow in 
both directions. The connection can be terminated by ’hanging’ up the phone line.

You can also manually start a connection by typing 

ATD<ip_address>,<port_number>

 and end 

the connection by typing 

. The 

 can be in IPv4 or IPv6 formats and is the IP 

address of the receiver. For example, 

 or you can use 

, without any punctuation (although you do need to add zeros where there 

are not three digits presents, so that the IP address is 12 digits long).