User manual

12
Output Power:
2 Watt Peak (Class 4) GSM9001 Watt Peak (Class 1) GSM1800
Description of recommended antenna parameters:
The antenna that the customer chooses to use should fulfil the following requirements:
Frequency range
Dual Band
GSM 8501800MHz
Depending by frequency band(s) provided by
the network operator, the customer shall use
the most suitable antenna for that/those band(s)
Bandwidth
80 MHz in EGSM 900, 70 MHz if GSM 850,
170 MHz in DCS, 140 MHz PCS band
Gain
> 1.5 dBi
Impedance
50 ohm
Input power
> 2 W peak power
VSWR absolute max.
10:1
VSWR recommended
<= 2:1
Table 4: Recommended antenna parameters
2.4 SIM card reader
The GT864 E Terminal is fitted with a SIM card reader designed for 3V SIM cards. It is the flip-
up type which is lockable in the horizontal position and is accessed through a removable panel.
2.5 RS232 Serial Port
The modem supports a standard RS232 serial interface (EIA/TIA 574) via its 9 pin Sub-D
connector, shown below. In line with serial communication terminology the GT864 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 GT864 Terminal is 230,4 kbit/s.
Signal
Direction
Limits
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