bonding ADSLs using the sangoma pci cards

We are planning to bond 3 ADSL using the BGP protocol and the Sangoma pci cards.

Is it possible, in 2.9, to bond the lines without tricking the bgp?

Thanks

Have you tried this on a Linux or BSD server? And if so how did it work. I would think that if you could get this working without problems on a Linux server then show a config for a working model then you may get some help from the forum.
I am also trying deferent things to bond ADSL, 1: mlppp, works but we are still working the bugs out and it looks like the bugs are pretty big. 2: ML-IP which works very well in some locations, but not at all in others. 3:VPN bonding, to get the same effect of bonding the ADSL lines, but still have had little success with it.