CEP Terminals GT910 G, User Manual, Page: 19 / 28

19
PIN Signal Direction Limits Description
3 EMERG_OFF Input 5 – 32V Active high control line used to
switch off the terminal
V
IH
> 5V, V
IL
< .5V
Power off: t >1s
4 TO_IN Input 5 – 32V Positive edge triggered signal;
used to switch on the modem
V
IH
> 5V, V
IL
< 0.5V
Power on: t >1s after VCC
available
V
IH
= Voltage Input high
V
IL
= Voltage Input low
5 DIG_OUT Output 5 - VCC (Optional) Digital Output VCC,
max. 400 mA
6 GND Input - Negative power (ground) input
and return path for TO_IN and
EMERG_OFF
Table 5: RJ11 Pin and Signals Description
4.2 Antenna Connector
The antenna connector on the modem is assembled with an FME male coaxial jack. The customer-
selected antenna should fulfil the following requirements:
 Frequency range: Depending on the frequency band(s) provided by the network operator, the customer
shall use the most suitable antenna for that/those band(s)
 Bandwidth:
-
70 MHz in GSM 850
-
80 MHz in GSM 900
-
170 MHz in DCS Band
-
140 MHz in PCS Band
 Impedance: 50 Ohm
 Antenna Gain:
-
GSM 850: < 6.43 dBi
-
PCS 1900: < 2.75 dBi
 Input Power: > 2 W
 VSWR absolute max.: ≤ 10:1 (limit to avoid permanent damage)
 VSWR recommended ≤ 2:1 (limit to fulfill all regulatory requirements)
 Length of the antenna cable: <3m
4.3 SIM card holder
The Terminal is fitted with a SIM card holder 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.
4.4 RS232 Serial Port