Think back...2514 with two serial ports, can I bind two DS1's together with MLPPP on this old platform? I have found references for multi-chassis multi-link but I'm not sure its the same thing.
I don't believe so. MLPPP was introduced in 12.2.8T for most routers (while it was released in 12.0S for the 7xxx series). The 2514 doesn't support anything in the T train.
You can see the specifics in http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/mplsdmlp.html
Rate if that helps. Thanks!