PASSING Mobile number throgh BAPI_SALESORDER_CREATEFROMDAT2

Dear Expert,

We are having requirement where we need to pass mobile number while creating sales order using BAPI BAPI_SALESORDER_CREATEFROMDAT2.

I have used PARTNERADDRESSES structure to pass on address related values .In the same structure i could not find out field ..

Can you please suggest me which field i can use for passing mobile number?

Thanks

Surekha