There are two types of standalone DCP data modules as shown in below table.
Standalone DCP data modules
Type
Name 50
Interfaces to:
MPDM
Modular Processor Data Module
DTE (data terminals, host computers, printers)
MTDM
Modular Trunk Data Module
DCE (modems, data modules)
50Early versions of these data modules were referred to as PDMs and TDMs, respectively. Later models are designed to provide a variety of interfaces by using interchangeable modules and are thus called modular data modules
