No RTP between two SD's when "restricted-latching sdp" has been configured

Hallo,

 

I hope that some one knows the trick to overcome the following issue.

 

Scenario

 

- Client A calls via SD4500-A to a MS Lync user

- MS Lync forwards the call back to us, however via a different Point of Interconnect SD4500-B

- Call gets answered and MS Lync releases media

 

Call state

UA-A ---> SD-A < ---internet ---> SD-B ---> UA-B

 

Both SD's are configured with "restricted-latching sdp" and are therefore waiting on the 1st rtp packet to arrive, which does happen of course. I.o.w. a very peacefull call if you like silence

 

Is there a setting or option to overcome this.