User manual

11
Frequency range
GSM 850/900 MHz
GSM 1800/1900 MHz
Bandwidth
80 MHz in EGSM 900, 70 MHz if GSM
850,
Gain
< 3dBi
Impedance
50 ohm
Input power
> 33dBm (2W) peak power in GSM
VSWR recommended
< 2
Table 3: Recommended antenna parameters
2.3 SIM card reader
The HT63-E 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 HT63-E 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 HT63-ETerminal is 230400 kbit/ s.
The electrical characteristics of the serial port signals are shown below:
PIN
Signal
Direction
Voltage levels
Description
1
DCD
Output
> + 4V
<- 4 V
Data carrier detect
2
RD
Output
> + 4V
<- 4 V
Received data
3
TD
Input
> + 2,4V
< 0.8 V
Transmitted data
4
DTR
Input
> + 4V
< 0.8 V
Data terminal
ready
5
GND
-
0 V
Ground connection
6
DSR
Output
> + 4V
< - 4 V
Data set ready
7
RTS
Input
> + 2,4V
< 0.8 V
Request to send
8
CTS
Output
> + 4V
< - 4 V
Clear to send
9
RI
Output
> + 4V
< - 4 V
Ring indicator
Table 4: Electrical characteristics of the serial port signals