Fetching data from C4C using OData Service Explorer

Hi Experts,

We are fetching contact data from C4C using OData Service Explorer using standard service "c4codata" -> ContactCollection. In order to fetch the contact communication data from ContactCommunicationDataCollection, we have to pass the Contact ID from ContactCollection to ContactCommunicationDataCollection.

Question is, how to fetch data from ContactCollection and ContactCommunicationDataCollection simultaneously in one go?

I tried creating custom OData service to achieve this but unable to do so.

Please help with steps. Thanks.