[sipcore] Does SIP support "Reverse Charging" function?

[[e-mail]]

Hi,

Background:
1. Reverse Charging is defined by ITU in I.256.3;
2. 3GPP's 22.173 and 24.173 have mentioned "Reverse Charging", but there's 
no specific definition.


Now, we(ZTE)'d like to implement the "Reverse Charging" in SIP network. 

Question:
"Reverse Charging" need some indication extension for SIP usage, I'd like 
to know how people think about this problem.

If this problem has been discussed here, sorry for that.

Thanks,

Gao

===================================
 Zip    : 210012
 Tel    : 87211
 Tel2   :([phone]
 e_mail : [e-mail]
===================================

--------------------------------------------------------
ZTE Information Security Notice: The information contained in this mail is solely property of the sender's organization. This mail communication is confidential. Recipients named above are obligated to maintain secrecy and are not permitted to disclose the contents of this communication to others.
This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the originator of the message. Any views expressed in this message are those of the individual sender.
This message has been scanned for viruses and Spam by ZTE Anti-Spam system.