Your question is fine. Here's the deal You cannot put more than a t1 into a Physical T1 port on a router with the exception of on a regular serial connection you can put 2 meg into it. However, if you are trying to get more bandwidth to a remote there are several options.
First, I would not run more than 2 t1's into a 2600 inless it's a newer high performance router.
the best performance is on the 2691 at 70k packets/sec. You could go to a HSSI interface if you have at least a 3600 series router. A HSSI port would give you more flexibility in that you can put a CSU in front of the router and get multiple t1's for example and mux them together. You could also go to a fractional t3 in that same fashion.
Another alternative is to run CEF over multiple t1's connecting 2 routers together as well.
Or multilink PPP
Or IMA Inverse Muxing Over ATM.
The most important thing to do is size the pipes accordingly.
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...