I'm not sure I understand exactly what you need to do. Is it that you need to make 15 different isdn connections at 128k to remote sites? If so configure your isdn for dialer profiles and do "dialer max-call 2" under your dialer profile config.
Its just a matter of configuring the "dialer profile" correct on the router who is receiving call. Looks like you want to dilain bri at 800 routers into the 3600 router and wants total thruput of 128K..
Here is some config examples for you for dialing using bri into pri line and receiving router uses the dialer profile.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...