One EP 7.0 One JAVA Stack 7.0 and Two ABAP-Systems

Hi,

we have 2 different system-lines each with a Enterprise Portal, Java Stack and ABAP System for a Development, Quality and Production-System using BI 7.0 on SP15.

Example for Production:

EP 1 -> WAS 1 -> ABAP 1

EP 2 -> WAS 2 -> ABAP 2

For Maintenance reasons we want to have only one Portal and one Java Stack working with the two ABAP-Systems-Lines.

Target environment:

EP new -> WAS new -> ABAP 1

-> ABAP 2

As i heard, BI 7.0 could only work with one dedicated ABAP System. I found no documentation or notes for such a limitation.

It is true ? Where can i found informations about the installation szenarios ?

Thanks for help.

Regard

Jürgen