I have an ISDN network as the following:
Main office :
Cisco router 2821
- Cisco router 1841
- WIC-BRI- S/T -V3
After I complete the configuration all branches working well but I can't add new branches because there is no ISDN lines available in these places just I found Telephone line (Dial up).
The problem is what I need to add in the main router ( Hardware and configuration) to make the main router accept the dial up calling ?
Find the attached image about the network which I need.
ISDN branches are working well only the dial up branch (PC) is not working yet.
Thank you for your help.