CEP CT63 사용자 설명서 - 페이지 11

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2.3 SIM card reader

The CT63 Terminal is fitted with a SIM card reader designed for 1.8V and for 3V SIM cards. It is the flip-

up type which is lockable in the horizontal position and is accessed through a removable panel.

2.4 RS232 Serial Port

The modem supports a standard RS232 serial interface via its 9 pin Sub-D connector, shown below. In

line with serial communication terminology the CT63 Terminal should be considered as the data circuit-

terminating equipment (DCE) and the external application or computer as the data terminating

equipment (DTE). The maximum baud rate to communicate with the CT63Terminal is 230400 kbit/ s.

2.5 Serial Data

The modem supports the standard data character format of



Programmable baud rate (300bps to 230,400bps).



Auto-configuration mode with auto-baud (1,200bps to 230,400bps).



Multiplex ability according to GSM 07.10 Multiplexer Protocol.

2.6 Serial Data Signals

Serial Data from Modem (RD)

RD is an output signal that the modem uses to send data to the application.

Serial Data To Modem (TD)

TD is an input signal, used by the application to send data to the modem.

Signal

Direction

DCD

Output

Input

DTR

Input

GND

DSR

Output

RTS

Input

CTS

Output

Table 3: Electrical characteristics of the serial port signals

Limits

> + 4V

<- 4 V

> + 4V

<- 4 V

> + 2,4V

< 0.8 V

> + 4V

< 0.8 V

0 V

> + 4V

< - 4 V

> + 2,4V

< 0.8 V

> + 4V

< - 4 V

> + 4V

< - 4 V

Description

Data carrier detect

Received data

Transmitted data

Data terminal ready

Ground connection

Data set ready

Request to send

Clear to send

Ring indicator