Communication between an SUP/SPP which uses the OpenTP1 remote procedure call (the function dc_rpc_call()) and a server UAP which uses TxRPC is performed as follows:

• An SPP called using the function dc_rpc_call() can call another SPP using TxRPC.
• A TxRPC server UAP can request an SPP for service using the function dc_rpc_call(). However, any server UAP with process type nbet cannot use this function.