multilink ppp for T1s

I want to build a linux router that will support multiple bonded T1
channels using MP (RFC 1990). Has anyone successfully configured such a
system with multiple T1 cards?

There is an MP package, but it seems to no longer be under development.
Has anybody used this? http://linux-mp.terz.de/

Do any kernel versions support MP (MLPPP) natively?

Thanks,
Alan

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