DCP Series Telcon Message Manual - Public Support Login - Unisys

COMUS
Glossary
Acronym for Computerized Onsite Maintenance of User System. COMUS is an OS 2200
processor that leads you interactively through the process of defining the configuration
and parameters for the software products you want to install. For example, after you
define a CMS 1100 configuration, COMUS calls the symbolic stream generator, which
creates a runstream to generate a CMS 1100 configuration file. COMUS can also initiate
generation of the Telcon software for DCPs in your network.
Critical Event Notification and Logging (CENLOG)
1) A proprietary system for Telcon that collects alarms, statistics, and significant events
for displaying on NMS consoles on various DCPs in the network or for logging into
mass storage log files on various DCPs.
2) The facility that allows software processes to log system and error events. Logs are in
a standard format and can be written to a disk file cataloged for that purpose. In
addition, warning messages are sent to network administrator consoles for critical
events.
D
Data Circuit-Terminating Equipment (DCE)
1) A PDN device, usually a packet-switching communications processor, that functions
as a gateway to the network. It interfaces with data terminal equipment (DTE) so the
DTE can access a network.
2) A network switch that communicates with customer equipment (a computer or
terminal). X.25 defines how a DCE (network equipment) communicates with a DTE
(subscriber equipment).
Data Link Connection Identifier (DLCI)
A 10 bit value stored in a Frame Relay frame that identifies the destination of the frame.
This value is preconfigured in the network to identify a given destination. Telcon Frame
Relay must match the assigned network value to reach a given destination. Because these
connections are static, they can be called permanent virtual circuits (PVC).
DCA
See Distributed Communications Architecture or Defense Communications Agency.
DCA Transport Protocol (DTP)
The DCA Level II layer 4 protocol that defines the set of rules for creating and maintaining
end-to-end communication paths between computing systems or transport service users.
It connects and terminates connections, controls data flow, recovers errors, and segments
and recombines messages. DTP replaced port flow control and the Device Management
Facility (DMF), which are functions supported by DCA Level 1. Handles all DCA Layer 4
traffic between DCA Layer 3 modules (such as DNS or TSTN) and DCA Layer 5 modules
(such as DTPX).
DCA Transport Protocol Extension (DTPX)
The DCA Level II layer 5 protocol that establishes and controls interactive session, session
layer addressing, and data assurance. Handles all DCA layer 5 traffic between the DCA
Layer 4 modules (such as DTP) and a VTR (via TSM) or end-user module (via EUSERV).
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