ei, C nodes: description

two tiers
C++ client calling Mod,Func,Arg
remote OTP node

OTP resources already in use, at known "intentional" DNS names

software stack on C++ client
C++ app
C++ driver with app-specific objects
our C driver, generic - heartbeat, reply matchup
Ericsson's ei_rpc

each application thread calls M,F,A, waits for response