Can we read the archived files of 3.1i in ECC

There are 2 boxes ( servers ) for SAP for the client

1. Global u2013 ECC

2. US only u2013 3.1i

Eventually in a year they will be merging with globalu2026In the sense the configuration for US legal entities will be done and along with the master data and open items . So the US 3.1i box will become redundant once it is mergedu2026But the history is required and hence archiving is done in 3.1i box .

After archiving from 3.1i the idea is to copy the archive file from US ( 3.1i ) to global box ( ECC ) .

1. Is it technically possible ?

2. I read that ADK will do the manipulation of data if the archive files area at lower version . Is the manipulation is possible to the extent from 3.1i to ECC ?

3. What are the pre-requisite.

Thanks in advance

Srihari