GTM-204M-4G Series User’s Manual v1.1
- 2/35 -
2. Hardware Specifications
Item
GTM-204M-4GE
GTM-204M-4GA
GTM-204M-4GC
GSM / GPRS Interface
Frequency Band
850/900/1800/1900
MHz
850/1900MHz
900/1800MHz
GPRS Connectivity
GPRS class 12; GPRS station class B
Data
GSM max. 85.6kb/s
UMTS max. 384kb/s
DC-HSPA+ max. 42mb/s
LTE-FDD max. 100mb/s
Coding Schemes
CS 1, CS 2, CS 3, CS 4
3G Interface
Frequency Band(WCDMA)
850/900/2100 MHz
850/1700/1900 MHz
900/2100 MHz
Frequency Band(TDSCDMA)
1900/2100 MHz
4G Interface
Frequency Band(FDD)
B1/B3/B5/B7/B8/B20
B2/B4/B5/B12/B17
B1/B3/B8
Frequency Band(TDD)
B38/B39/B40/B41
SMS
SMS
MT, MO, CB, Text, and PDU mode
Comm. Interface
COM Port
RxD, TxD, GND
COM Port Baud Rate
9600 bps ~ 115200 bps (default
:
115200 bps)
USB
USB 2.0 (high speed)
USB Driver Support
Windows XP/Vista/7/8/CE, Linux
LED Indicators
Power
Red
3G/GSM
Green
Power
Protection
Power reverse polarity protection
Frame Ground Protection
ESD, Surge, EFT, Hi-Pot
Required Supply Voltage
+10 V
DC
~ +30 V
DC
Rated Current
30 ~ 15 mA / 10 ~ 30 V
DC
Reset Input
Input Type
Isolated, 3750 V
rms
On Voltage Level
+3.5 V
DC
~ +30V
DC
Off Voltage Level
+1 V
DC
max.
Input Impedance
3 kΩ, 0.25W
Mechanical