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SIP-GTD support in PGW only for incoming SIP messages

Hi Experts. I'm testing PGW 9.6(1).

Is there a way to enable SIP-GTD support in PGW, only for incoming SIP messages?

In my scenario, the PGW should honour the incoming SIP-GTD messages but not should generate outgoing SIP-GTD messages (only standard SIP).

e.g.

INVITE SIP-GTD (Content-Type: multipart/mixed  application/sdp + application/gtd) ---> PGW 9.6(1) ---> ISUP IAM

ISUP IAM ---> PGW 9.6(1) ---> INVITE SIP (Content-Type: application/sdp)

I've enabled these parameters on incoming SIP trunk only:

ISUP Transparency Disable: Disable

GTDCapTypeProp: ALL

ISUPTransEarlyBackwardDisable: Enable

sipMimeBodySupport: 2

In this way PGW handles correctly incoming SIP and SIP-GTD messages but adds GTD headers in outgoing 180,183 and 200/SDP messages.

Regards.

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