ISDN Router Manual V.1.1
14
4. Installing the Router
4.1 Entering AT command mode
To operate the router, you need to set up the necessary configuration. Follow these steps to setup
the router.
(1) Connect your PC with RS232 cable to router’s DTE port.
(2) Use any terminal programs that support ASCII file transfer function, such as HyperTerminal.
(3) Enter into the terminal mode and make sure that the terminal program had set the following
configuration.
l
115200 baud rate
l
8 data bit, no parity, 1 stop bit (8N1)
l
Hardware flow control
(4) Type AT and check router responded with “OK”. If the router responded “OK”, meaning that
you have successfully entered into AT command mode. Otherwise please check the RS232
cable to see if it’s connected ok, or check if the COM port setting was correctly.
4.2 Setting ISDN telephone number
Similar with the regular PSTN (Public Switch Telephone Network) line, it has an unique
telephone number. When you apply the ISDN line from PTT or service provider, you will be
assigned an ISDN line number. But due to 2B+D technology, the ISDN allows you to have
two numbers in one ISDN line. The local PTT or service provider may assign two different
numbers to you. One is the line-number ( registered as the number of this ISDN line), the
other one is the DDI (Direct Dial In) number (allowing someone to call in directly using this
DDI number). Therefore you can apply two different numbers for both analog ports of TEL-A
and TEL-B. If you apply only one set of number (line number), the router will ring TEL-A and
