Motorola’s MTP850Ex TETRA portable terminal provides high quality communication with comprehensive user safety and class leading ATEX specifications allowing use when in environments containing potentially explosive gas and dust. Motorola is a world leader in the development and deployment of TETRA communication solutions, and the MTP850Ex ATEX TETRA radio delivers safe and reliable communications for users with a powerful set of features to harness the capability of TETRA.



High Performing Communication

  • Strong rugged design for optimum reliability in harsh conditions
  • Powerful, high quality audio in most demanding environments
  • Full range of supporting ATEX certified accessories to tailor customize solution


Comprehensive User Safety

  • ATEX & IEC-Ex gas and dust approvals
  • Integrated GPS for user location


High Performance Communication
The MTP850Ex delivers best in class audio performance in the typical noisy environments where specialist users from industry or public safety operate.

Comprehensive User Safety
The MTP850Ex can be used in explosive gas and dust environments due to its high level of protection – including dust Zone 21 and 22. Operational safety is further enhanced with a range of features including:

  • State of the art integrated GPS receiver providing the ability to locate personnel through the radio, improving user safety and resource management.
  • Internal “Man Down” alert – this fully integrated solution triggers an emergency procedure when the carrier of the radio remains motionless far a set period or falls down.

Simple but Powerful User Interface
The simplified keypad with large button surface makes the MTP850Ex easy to use with gloves. Combined with the large scalable display fonts and icons, the MTP850Ex facilitates operation in difficult environments with limited visibility.

Data Applications Capability
The integrated WAP browser and Multi-Slot packet data enables rapid access to critical information in the field. Applications are further enhanced with ability to have simultaneous Short Data Service (SDS) and Multi-Slot packet data services via TNP1 protocol.Internal “Man Down” alarm.


Physical Characteristics

  • Dimensions H x W x D (with standard battery)

    135 x 55 x 38 mm

  • Weight

    400 g (including battery, antenna)

Performance Characteristics

  • Battery capacity

    725 mAh, 7.2V

  • Battery life – standard (based on a 05 05 90 duty cycle)

    12 hrs, typ

  • Frequency bands

    380 – 430 MHz

  • Channel spacing


  • Power


  • RF power control

    3 steps of 5 dB

  • OTAR


Radio Features

  • Switching bandwidth

    50 MHz

  • RF power level accuracy

    +/- db 2

  • Receiver class

    A & B

  • Receiver static sensitivity

    -112 minimum, -115 typical

  • Receiver dynamic sensitivity

    -103 minimum, -107 typical

  • Scan types


User Environment

  • ATEX gas specifications

    II 2G Ex ib IIC T4, IEC Ex rating, Ex ib IIC T4 (Approved for Zone 1 & 2, Equipment Group II, Gas Group C, Temperature Class T4, -20oC to +50oC)

  • ATEX dust specifications

    ATEX dust specifications

  • Operating temperature

    “-20°C to +50°C (Hazardous environments)
    -20°C to +60°C (Non-hazardous environments)”

  • Storage temperature

    -40°C to +85°C

  • Humidity

    ETS 300 019-1-5 Class 5.1 and 5.2

  • Dust and water

    IP65 per IEC 60529

  • Shock, drop and vibration

    ETS 300 019-1-5 Class 5M2

  • IP Standards


Voice Services

  • Talkgroups

    2048 (TMO) & 1024 (DMO)

  • Phone book

    1000 entries

  • Scan lists

    40 lists, 20 talkgroups / lists

  • Ambience listening


  • Transmit inhibit


TMO Services

  • Telephony

    Full duplex

  • DGNA

    Up to 2047 groups

DMO Services

  • Group call

    Late entry

  • Private call

    Half / full duplex

  • Compatibility with

    Gateway and repeater

Emergency Voice Services

  • Smart emergency

    DMO / TMO / DMO to TMO

  • Hot mic

    Configurable timers

  • Location

    Send on emergency

  • Emergency target address

    Individual or group

  • Alarm

    Emergency status

Data Services

  • Status messaging

    100 alias messages

  • Short data service (SDS)

    20 message inbox, individual or group addresses, send/receive during calls

  • Packet data (PD)

    7.2kbps – 28.8 kbps gross (single or mutli-slot)

  • Browser

    Integrated Openwave browser

  • PEI

    AT commands

Security Features

  • Air interface encryption algorithms

    TEA1, TEA2, TEA3

  • Air interface encryption security classes

    Class1 (clear), Class2 (SCK), Class3 (DCK, CCK & GCK)

  • Key provisioning

    Secure provisioning tool (key variable loader KVL)
    Over the Air Re-keying (OTAR) for SCK and Class 3 (CCK & GCK)

  • Network access

    Temporary enable disable (Stun), Permanent enable disable (Kill)

  • Authentication

    Infrastructure initiated and made mutual by terminal

GPS Specifications

  • Simultaneous satellites


  • Mode of operation

    Autonomous or assisted (A-GPS)

  • GPS antenna

    Integrated in TETRA antenna

  • GPS sensitivity

    -152 dBm / -182 dBw

  • GPS accuracy

    5 meter (50% probable)

  • Location protocols

    ETSI LIP, Motorola LRRP