what role of sd functional consultant in ale and idoc scenarios

Hi friends,

I am sd consultant having worked for indian support projects and implementaiton project. i do not have idea of ALE and IDOC scenarios. Now i am on foreign offshore support project where they asked for ALE AND IDOC knowledge. please guide me how to go ahead and please inform what role and responsibilities should have. i heard support may be for order management and delivery from sd module

please give me details steps and T.codes.

Regards,

Veeresh