[Users] Multi Call Leg Accounting/Billing

Hello guys, I read in the documentation for the ACC module that it supports multi call-leg accounting via the use of AVPs, which comes in handing when doing call forwarding. However, I've googled the way with all the keywords that I could think of and I cant find an example of this feature. I understand that you have to turn it on using: modparam("acc", "multi_leg_enabled", 1) modparam("acc", "src_leg_avp_id", 110) modparam("acc", "dst_leg_avp_id", 111) But it doesn't show or say when/how to use the AVPs. Can anybody provide a sample snippet or their openser.cfg file to demonstrate how it's used? Thanks in advance! Lenir P.s. perhaps put a sample config in the documentation. The one there doesn't show how to use Multi Call-leg billing.