PT630 Operation Guide
Page 5 of 41
______________________________________________________
1.2.3 Serial Port Subsystem
The PT630 terminal has an RS-232 serial port for data communication. The communication
subsystem consists of point-to-point protocol for general processing and multi-point protocol for
network processing. The PT630 also supports a built-in Kermit server for point-to-point
communication.
1.2.4 Real Time Clock Subsystem
This subsystem allows users to set and obtain system date and time from the Real Time Clock
Integrated Circuit (IC) in the PT630.
1.2.5 Bar Code Input Port
The PT630 has a built-in barcode decoder. The terminal reads bar code labels through an integrated
laser scanner module, pen type module.
1.3 Diagnostics and Power-On-Test
The system diagnostic routines exercise the ROM validity check, test the RAM, system parameters,
the keypad, the real time clock, the RS-232 port, LCD and scanner port. The power-on-test is a
subset of the system diagnosis that only includes the ROM validity check, system parameter check
sum test, and back-up battery level check.
