Nortel DMS-100 Series Application Manual page 396

10-4 List of terms
signaling connection control part (SCCP)
A level of CCS7 layered protocol. It supports advanced services such as
E800/SSP service and the Automatic Calling Card Service feature. The
main functions of the SCCP include the transfer of signaling units with or
without the use of a logical signaling connection and the provisioning of
flexible global title translations for different applications.
signaling terminal (ST)
The hardware that performs error checking, coding, and decoding of
signaling messages. In common channel interoffice signaling and CCITT6,
it consists of a signaling terminal controller, modem, and a modern interface
card. In CCS7, the signaling terminal is a single card.
signaling transfer point (STP)
A node in a CCS7 network that routes messages between nodes. STPs
transfer messages between incoming and outgoing signaling trunks, but,
with the exception of network management information, do not originate or
terminate messages. STPs are deployed in pairs. If one STP fails, the mate
takes over, ensuring that service continues without interruption.
SOS
See support operating system.
ST
See signaling terminal.
STP
See signaling transfer point.
support operating system (SOS)
The software that sets up the environment for loading and executing the
application software in the DMS-100 Family system. SOS includes the
nucleus, file system, command interpreter, and loader.
TOPS
See traffic operator position system.
total call attempts
The number of central controller call attempts on the office. This is the sum
of total originating attempts and total incoming attempts as previously
defined. This value can be found in the header of the report adjacent to
TOTATT (K).
297-1001-330 Standard 11.04 June 1998