I have a lab setup of two 2821 routers connected back to back using E1 pri links and want to send Data on this link. In order to achieve this task i have configured channel groups on controller interface, assigned ip address and routing and the setup works perfectly works fine.
However my question is in real scenario since E1 is a circuit switching link and Service provider has to exactly map all channels on side A to all channels on side B over PSTN network for ever unlike ondemmand circuit switching (Telephony) network. inorder to achive this task what exactly we need to communicate to service providers of E1 link? also confirm my understanding on this is correct? or is this link is a special link which can only be deployed by single service provider? or what is the funda behind this?