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

[[e-mail]]

Hi Keith,

> P-Charging-Vector and P-Charging-Function-Addresses header fields 
> are not specifically any form of charging.

Yes. So, I said that they are syntax level standardization for the SIP 
extension.
 
> I would suggest that to do reverse charging, you need a charging 
> model in the first place. That does not exist in IETF. Even in 3GPP,
> it would need additional work, because you would need to address 
> signalling transactions to the entities performing the charging, 
> rather than those collecting the data.

IMO, this work should do it's function level things in 3GPP and syntax 
level standardization for SIP extension in IETF.

I guess you(or ALU) would alos have reverse charging requirement for your 
deployed IMS network. Then, may us propose the requirement to the SA1 
group, and then, SIP extension work in IETF?

Thanks,

Gao


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