17
PIN
Signal
Direction
Limits
Description
5
DIG_OUT
Output
5 - VCC
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
The TO_IN signal requires a positive “edge” (a sharp” signal transition from low to high) to
turn the modem on. This transition should be a rising signal from 0V (GND) to VCC, or at least
a large fraction of that voltage range, and must be applied at the same time as VCC or after it.
Very slow transitions (significantly slower than many milliseconds) or very small transitions
(e.g. only few volts instead of 0V to VCC) will not turn on the module (since they are not
considered to be a “positive edge”).
4.2
Antenna Connector
The antenna connector allows transmission of radio frequency (RF) signals between the modem and an
external customer-supplied antenna. The modem is assembled with a 50 Ohms, FME male coaxial jack.
The customer-selected antenna should fulfil the following requirements:
Frequency range: Quadband (GSM 850/ 900/ 1800/ 1900 MHz)
Bandwidth: 80 MHz in EGSM 90
Gain: <3dBi
Impedance: 50 Ohms
Input Power: >33 dBm (2W) peak power in GSM
VSWR recommended: <2
4.3
SIM card reader
The CT63 NG 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.
