The computer you are dialing is not answering?

1. Check telephone line is properly connected to line port (not in phone port).

Change Modem speed both in control panel and dialup networking. (57600bps in control panel and 38400 bps in dialer for digital line).

2. Check telephone number is correct, otherwise using area code/dialing rule. No need to disable dialing rules.

3. Check DNS numbers are correct for specific domain (bol-online.com/dhaka.net)

4. Also check in control panel --->Network ---> TCP/IP (if there is any default DNS setup then add also bol-online.com/dhaka.net with IP.