How to daisy chain mc3810

[r-reed]

Have a 3810 with 24 channels in use. WAN is FR. Want add an additional 24 by using second 3810. I need pointers on how best to daisychain them. Should I use FR or HLDC. When original 3810 has all channels busy, how does it roll to second one?

Thanks for any help

[wdrootz]

I guess you can do this if both circuits are in the same router, but not across two routers. I am not sure though! Anyone else has any clue on how to do this?