ng databases and Cus- SuperNode CPU are programmed in PROTEL (PRocedure tom Programming. Many new applications can, however, be added 32/24 Telephone exchanges as desired, because of the flexibility of DMS-Link and the DMS voice circuit monitoring) and integrated test jacks (for using non- SuperNode architecture. standard external test equipment). The hardware for DMS-Link is based on that of DMS SuperNode The MAP may be used, subject to terminal and user security and DMS SuperNode's distributed operating system controls com- screening, to access a variety of maintenance and administration munication between the various processors in the system. When a software environments. These include: single application is spread across multiple processors, the opera- ting system allows the various elements of that application to 1. General exchange maintenance. communicate. When several similar functions are integrated across 2. Network management. a number of switching nodes, they are said to be networking. 3. Service analysis. Networking with DMS-Link provides a seamless view of a func- 4. Operational and traffic measurements. tion, whether it is the transportation of the calling number from 5. Trunk testing. originating to terminating node, or the transmission of a traffic 6. Line testing. summary for a given Centrex customer to multiple nodes. This 7. Data modification and service orders. seamlessness is achieved through DMS-Link's use of protocols (comparable to languages) and applications (comparable to seman- Full screen displays are used to provide a 'live' picture of overall tics) which together help create a suitable environment for 'conver- system and subsystem status as well as menu driven command sions' between nodal functions. This environment, which prompting for maintenance, testing and data modification. disassociates the customer's logical network from any specific IOC are interfaced onto the DMS-Bus via two DS30 message physical implementation, creates a platform for launching new links (one to each Messa