Sim Ring Feature 1 way audio, Sim Ring Feature 1 way audio

Hi

I have an issue with one way audio on sim ring , i have the sim ring setup on my broadsoft server, the users desk phone sim rings to their skype device,

If a user calls in from and it sim rings to skype there is 2 way audio, however if the user answers on their primary device there is 1way audio-external party cannot hear,

Setup SP--SBC--BROADSOFT--SBC--SKYPE

Thank you