Introduction
Though the MTM800E and MT953CG MTM800FuG, MTM800FuG ET may appear similar in body and aspect, they differ significantly in functionality. The MTM800 FUG/ET hardware boasts specifications akin to the upper series MTM5400, featuring capabilities such as 10 W power output, 25/50 kHz channel spacing, GNSS integration and DMO Repeater mode.
The Motorola MT953CG MTM800FuG, MTM800FuG ET (Fall-back Unit Gateway) version is designed for secure and reliable communication, particularly for public safety and emergency services in Germany.
MTM800FUG/ET (Fall-back Unit Gateway) version include a special feature called the Fall-back Unit Gateway (FUG). The FUG capability allows the device to maintain communication even when the TETRA network is unavailable or compromised. It can switch to a direct mode operation (DMO) and provide local gateway services to other radios in the vicinity, ensuring continuous communication in critical situations.
This model was designed for use in scenarios where network coverage might be intermittent or in disaster situations where the network might fail. The FUG feature ensures that first responders and emergency personnel can still communicate effectively without relying solely on the network infrastructure.
The Motorola MT953CG MTM800FuG, MTM800FuG ET is rare but desired in the ham radio community due to MTM5400 hardware particularly favored for setting up multimode gateways such as DMR2TETRA, TETRA2PoC, SVXLink gateways or Use in DMO repeater mode.
Note that Motorola MT953CG MTM800FuG, MTM800FuG ET does have a factory
default “COR” pinout on the rear accessory connector!
Motorola MTM800 Sales Model Nomenclature
This nomenclature includes information about the product’s features, specifications, and intended use, and helps both the manufacturer and customers to distinguish between different versions or configurations of the product.
Motorola TETRA radios are available with various firmware versions, each featuring one of the following standard AIE TETRA Encryption Algorithms (TEAs):
– CLEAR NonE2 (No Encryption) This is the only one for HamRadio use!
– TEA1 is for commercial use and is primarily used by critical infrastructure around the world. But it’s also used by some police and military agencies outside of Europe.
– TEA2 (restricted to use by Schengen / EU countries). Possession of TEA2 radios is in many countries
prohibited by law!
– TEA3 Essentially the export version of TEA2 which is for use outside of Europe by the same kinds of entities that use radios with TEA2.
– TEA4 For commercial use but is hardly used.
In 2022 ETSI introduced additional algorithms, TEA 5, TEA 6 and TEA7, in order to future-proof the technology against quantum attacks. The entire set of these original and additional algorithms will be made available in the public domain as well as TAA1 (the original authentication and key management specification) and TAA2 (the new authentication and key management specification).
Each TEA version builds upon the previous one, incorporating enhancements to meet evolving user needs and address emerging challenges in communication security and efficiency.
Frequency Range from Factory:
The Motorola MTM800E series includes several models, also serveral HW revisions, each designed to operate within specific frequency ranges. Below is a list of some common models and their corresponding frequency ranges:
Model Number – MT953CG M83PFS6TZ5AG MTM800 FuG 380-430 MHz, DASH M1
Model Number – MT953CG M83PFS6TZ4AG MTM800 FuG 380-430 MHz, DESK M2
Model Number – MT953CG M83PFS6TZ6AG MTM800 FuG 380-430 MHz, REMOTE M3
Model Number – MT953CG M83PFS6TZ2AG MTM800 FuG 380-430 MHz, M’CYCLE M4
Model Number – MT953CG M83PFA6TZ5AG MTM800 FuG 380-430 MHz, DATA M5
Model Number – MT953CG M83PFT6TZ6AG MTM800FuG 380-430 REM ETHERNET
Also available in multiple Frequency Bands :
M = 260 – 275 MHz The 260–275 MHz radios do not support the SDS end-to-end encryption.
N = 350 – 390 MHz cannot be SW expanded in Ham Band
P = 380 – 430 MHz
R = 410 – 470 MHz Ham band covered no need expanding
U = 806 – 870 MHz, (for DMO; 851 – 870 MHz) N/A
Expanded Frequency Range:
Model Number – MT953CG (MTM800FuG, MTM800FuG ET
Model Number – MT953CG M83PFS6TZ5AG MTM800 FuG 380-430 MHz, DASH M1
Model Number – MT953CG M83PFS6TZ4AG MTM800 FuG 380-430 MHz, DESK M2
Model Number – MT953CG M83PFS6TZ6AG MTM800 FuG 380-430 MHz, REMOTE M3
Model Number – MT953CG M83PFS6TZ2AG MTM800 FuG 380-430 MHz, M’CYCLE M4
Model Number – MT953CG M83PFA6TZ5AG MTM800 FuG 380-430 MHz, DATA M5
Model Number – MT953CG M83PFT6TZ6AG MTM800FuG 380-430 REM ETHERNET
M = 260 – 275 MHz The 260–275 MHz radios do not support the SDS end-to-end encryption.
N = 350 – 390 MHz cannot be SW expanded in Ham Band
P = 380 – 440 MHz
R = 410 – 470 MHz Ham band covered no need expanding
U = 806 – 870 MHz, (for DMO; 851 – 870 MHz) N/A
Adaptation for Ham Radio Use
The Motorola MT953CG MTM800FuG, MTM800FuG ET is used Tetra radios adapted for Ham radio use. It is adapted for gateway builds like SVXLink or in DMO Repeater Mode
Attention! Due to the nature of the radio market, some units may originate from governmental working environments, still in use, stolen, lost, or intended for destruction but salvaged by individuals. If you notice any signs such as radio logos, initial messages, back labels, or additional markings indicating that the radio might be a “tea 2” or not a “clean radio,” do not purchase it. Instead, return the radio to the seller or report it to the nearest police station.
Only Clear radio firmware can be used for HamTetra use!!
Programming
To program the Motorola MTM800FuG, MTM800FuG ET, you will need a compatible programming cable and Motorola Tetra CPS or Motorola Tetra CPS Depot software. Additionally, for firmware upgrades, depend of existing radio firmware you need the right RPK file. Motorola MTM800FuG, MTM800FuG ET firmware can be upgraded through Motorola Tetra CPS or Motorola Tetra CPS Depot software.
Please refer to the Radio Quick Start Guide
Programming Cable
Programming the Motorola MTM800FuG, MTM800FuG ET is a straightforward process thanks to the availability of dedicated programming cable.This cable facilitate seamless communication between the radio and programming software, allowing users to customize settings, configure channels, and update firmware with ease.
Programming Cable for use:
Motorola PMKN4105A Serial Programming Cable (RIBless)
Motorola HKN6184 USB Control Head Programming Cable (GCAI)
Motorola PMKN4110A MTM5200 MTM5400 MTM5500 Rear Programming Cable
Detailed information to build your own compatible Motorola MTM800FuG, MTM800FuG ET USB/SERIAL Data Cable was also published on the website.
Antenna Considerations
For the Motorola MTM800FuG, MTM800FuG ET radio, two types of antennas are applicable: mobile and base station antennas. When selecting an antenna, it’s important to match it to the radio’s operating frequency
Pinout
1. UART1_TXD / USBx_D+
2. UART1_RXD / USBx_D-
3. UART1_RTS / USBx_VBUS
4. GND_USBx
5. 1-WIRE (1-Wire standard port, pulled via 2K2 to 5V inside U600)
6. KEYFAIL / FLASH (Key load, pulled via 10K to 5V. Flash input (>10V will trigger Flash mode))
7. SWB + (A+ voltage, limited to 14V, with 1A current limitation)
8. GND_MAIN (Main and power ground)
9. SPEAKER- (Loudspeaker/PA output – NOT TO BE GROUNDED!)
10. SPEAKER+ (Loudspeaker/PA output +)
11. TX_AUDIO (TX audio output)
12. GND_ANA (Main audio ground)
13. MIC1 / EXT_MIC (Ext mic input / MIC1 for noise-canceling dual mic input)
14. RX_AUDIO (RX audio output)
15. MIC2 (MIC2 for noise-canceling dual mic input)
16. GND_MIC (Ground for MIC)
17. EXTERNAL_PTT (PTT input, pulled via 4K7 to 5V)
18. UART2_DTR / USBy_ID (RS232 or UART1 / UART2 DTR / 2nd USB2.0 (OTG) ID)
19. HOOK_PA_EN (HOOK_PA_EN input or programmable 5V GPIO)
20. UART2_TXD / USBy_TX (RS232 or UART2 TXD / 2nd USB2.0 (OTG) D+)
21. UART2_RTS / USBy_VBUS (RS232 or UART2 RTS / 2nd USB2.0 (OTG) VBUS – 100mA)
22. UART2_RXD / USBy_RX (RS232 or UART2 RXD / 2nd USB2.0 (OTG) D-)
23. EMERGENCY (Emergency Input, pulled via 24K9 to A+ – Pull low to power on)
24. UART_CTS (RS232 or UART1 / UART2 CTS input)
25. IGNITION (Ignition input through series 15K – Pull > 5V to power on)
26. EXTERNAL ALARM (External Alarm input, pulled via 4K7 to A+)
This comprehensive list should be helpful for anyone needing to interface with the rear connector of the Motorola MTM800FuG, MTM800FuG ET
Accessories
N/A
Operating Procedures
Please refer to the user manual Here
Interfacing with Ham Radio Networks
Motorola MTM800FuG, MTM800FuG ET integrates perfectly into various HamTetra environments, demonstrating reliability in Direct Mode Operation (DMO), Trunked Mode Operation (TMO) and DMO Repeater Mode, ( it work as a DMO repeater also ).
Note that Motorola MTM800FuG, MTM800FuG ET have a factory default “COR” pinout on the rear accessory connector !
Compatibility with Other Radio Manufacturers
The Motorola MTM800FuG, MTM800FuG E interface with radios from other manufacturers, ensuring interoperability and compatibility across diverse communication systems.
Maintenance and Troubleshooting
Regular maintenance, including battery checks, firmware updates, and cleaning, ensures optimal performance and longevity of the MTM800FuG, MTM800FuG E. In the event of issues or malfunctions, troubleshooting procedures provided by Motorola or the HamRadio community can assist in diagnosing and resolving problems effectively.
* We do not provide programming software, licenses, additional information, or technical support beyond what is available through above published information!