Product specifications

INLINE SYSTEM
Sharp Electronics Corporation
Glossary of Terms
This network of point of sale systems and printers is controlled by a Master terminal. The
master is analogous to the file server in a PC LAN. The Master unit controls the issuing of
guest check numbers, stores sales data, and coordinates communication between all
nodes (Satellites) connected to the inline system.
The UP-800 inline system also provides for a backup to the Master called the Backup
Master. The Backup Master’s main function is to take over the jobs of the Master unit in the
event of the Master unit failing.
The satellites receive data from the master and report back sales data, guest check
information, and preset data look-up requests.
The final components of the UP-800 inline system are the remote printers (or kitchen
printers). The remote printers are output devices only but can communicate error codes
and other status information of the network.
Each satellite, each printer, the Backup Master, and the Master are assigned a unique
terminal ID # during the IRC programming. The terminal ID acts as the “address” for each
device on the network. When data is sent on the network, the data are contained in an
entity called a frame (packet).
Ethernet is a bus or star bus based technology that uses base band signaling and
CSMA/CD (carrier sense multiple access with collision detection) to arbitrate network
access. The Ethernet medium is passive, which means that the terminal drives the signals
over the network. The UP-800 Point of Sale systems are connected in the star topology
which means each terminal has its own connection directly to the hub.
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