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Modem for GSM/2G cellular networks
UniMod GSM-4


 UniMod GSM-4

PDF-Files UniMod GSM-4 Manual (File Size 1.7M)
PDF-Files UniMod GSM-4 Flyer (File Size 264K)
PDF-Files Antennas for UniMod GSM Modems (File Size 130K)

IPTBridge AMR over IP

Brief description

The world-wide GSM radio networks (GSM = Global System for Mobile communication) provide besides digital voice communication the possibility to transmit data. In that operation mode is it possible to send fax, data and short messages (SMS). The universal radio modem UniMod GSM-4 is supposed for remote inquiry of measurement data of any kind, especially however for telecounting applications.
The modem has a built-in, low-loss switched power supply, which enables it to operate on a wide-range AC or DC supply voltage.
The modem can be programmed with the parameterization software UniModSet.

The UniMod GSM-4 supports in the operation mode GPRS the meter data communication according to DIN 43863-4 (IP-Telemetry).

Housing outline drawing


The UniMod GSM-4 can be used in any EGSM 850/900/1800/1900-MHz network with an arbitrary number of providers. It requires however the infrastructure for operating mobile stations with 2 Watt (EGSM850/900) or 1 Watt (GSM1800/1900) transmission power. The modem supports an interface for 3V Mini-SIM cards. For communication a Mini-SIM card with call number for 9600 Baud transmission is needed.
For the UniMod GSM-4 communication modules produced by internationally renowned companies are used. These companies update their software packages regularly and add or change features. The software releases are continuously checked by the development department, but no responsibility for this software releases can be take over except of warranty granted by the module producer.


The interface for connecting the target device can be specified by plugging the appropriate interface module. The following module types are available now:

  • CS (20 mA current loop) interface module, active (supplies current) or passive
  • RS232 interface module (uses signals RxD, TxD, CTS, RTS, GND)
  • RS485 interface module
  • M-Bus interface module, active (can supply 20 devices max.) or passive
Communication is possible with many standard protocols, like SCTM, LSV1, IEC61107, IEC60870, DLMS, M-Bus, Modbus etc. (transparent reading)

Technical Data
Housing: Wall-mounted housing
Degree of protection: IP52 (IEC)
Dimensions: W = 105 mm,
H = 179 mm,
D = 72 mm
Protection class: 2
Supply voltage: 80VAC to 270VAC (50/60Hz) or 60VDC to 375VDC
10VDC to 36VDC (0,8A) or 20VDC to 72VDC
Power consumption:

About 4 VA
(depends upon supply voltage, kind of interface module and operating status of transmission unit)

Interfaces: Three internal interfaces:
- RS232 (RxD, TxD, DTR, DCD, GND)
- CS (20mA, current loop) active (can supply 4 meter max.) or passive
- RS485 2 wires

Optionally one extra interface by pluggable module:
- RS232 (supports signals RxD, TxD, RTS, CTS, GND)
- CS (20mA, current loop) active (can supply 4 meter max.) or passive
- RS485 2 or 4 wires
- M-Bus active (can supply 20 devices max.)
Service interface: RS232 (RxD, TxD, GND)
SMS input: 12VDC (in place of DTR signal) for potential-free contact
Display: LED’s: Power, GSM, 3 INF, RI (Ring), DCD, TxD, RxD
GSM unit: GE864-QUAD-Modul from Fa. Telit with 3V Mini-SIM-Card Interface
Fully type approved conforming with R&TTe directive
GSM band: Quad-Band EGSM 850/900/1800/1900 MHz
GPRS: Multi-slot class 10: downlink 4 timeslots, uplink 2 timeslots
Mobile station class B
M2M-communication: DIN 43863-4 (IP-Telemetry) or BAER-protocol
Transmission rate remote modem to UniMod: 9600 bit/sec (V.32 / V.110), 7 / 8 data bits, asynchronous
Transmission rate UniMod to connected device: 300 to 19200 bit/sec
Transmission mode: 7E1, 8N1, 8E1, ...
Output power: 2W (Class 4) for EGSM 850/900 MHz
1W (Class 1) for GSM1800/1900 MHz
Sensitivity: -107 dBm (850/900 MHz)
-106 dBm (1800/1900 MHz)

Antenna jack: 50Ω FME (m)
Software-Interface: Hayes Standard-AT, GSM 07.07, GSM 07.05
References: European Telecommunications Standards Institute,
Approval: CE0168 or CE0889
Extent of delivery: - UniMod GSM including interface module as ordered
- Standard antenna (length of cable about 2,6m)
- Operation manual
Accessories: - RS232 cable (#4301)
- Parameterization adapter with USB port (#12823)
- Antenna for special purposes
- Additional interface modules
- Suspension eye (#9141)
- Software UniModSet

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UniMod GSM-4 housing outline drawing
Unimod Masszeichnung 1
Unimod Masszeichnung 2
Unimod Masszeichnung 3

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Last Update 28.03.2019 at 14:51:23.