Siemens A53457 Installation & Maintenance page 21

OSI:
Packet Switch:
PST:
RAW Echelon:
RTS:
SEAR II or IIi:
SNTP
SSR:
TCP/IP:
TP:
UDP:
VSLIC:
Document No.: COM-00-05-16
Version: C.1
Office System Interface – Functionality allowing communications
between the SEAR II/SEAR IIi and the Office via the WAG.
Packet Switch - The process of routing and transferring data by
means of addressed packets so that a channel is occupied during
the transmission of the packet only, and upon completion of the
transmission the channel is made available for the transfer of other
traffic.
Persistent Serial Tunneling – Functionality allowing virtual
connection between two WAGs and their serial interfaces.
RAW Echelon - Echelon messages that are not ATCS messages.
Request To Send – A signal that indicates that the originator is
ready to send data to the destination site.
Safetran Event Analyzer Recorder, Model II or Iii – Siemens Rail
Automation product that is a non-vital stand-alone system designed
to provide continuous real-time general purpose status monitoring
and event recording for a wide range of functions associated with
railroad wayside and grade crossing installations.
Simple Network Time Protocol
Spread Spectrum Radio
Transmission Control Protocol / Internet Protocol - The Internet
protocol used to connect a world-wide inter-network of universities,
research laboratories, military installations, organizations, and
corporations. The TCP/IP includes standards for how computers
communicate and conventions for connecting network and routing
traffic.
Twisted Pair
User Datagram Protocol - A transport protocol used primarily for the
transmission of network management information. Not as reliable
as TCP.
Vital Safetran Logic I/O Controller – Siemens Rail Automation
product used for monitoring and reporting of switch position
information of hand throw switches in dark (non-signal) territories.
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June 2006, Revised June 2014