System Summary

Large-scale FDMA Digital trunked radio system SCT-2000, it is researched and empoldered? by GEC oneself. The system adopts digital voice and channel coding that based on the MPT1327 open standard signaling. The system? is backwards compatible with standard MPT1327 system and analogy trunked terminal. The system can supply integrates digital voice communication, radio data transmission, emergency alarm, long distance monitoring, large coverage, flexible networking and the professional dispatching management etc.? The system also comes with encryption interface for high-level secure application.
We have trunked terminals as digital portable radio NPT-800 and digital mobile radio NPT-868. The NPT-868 can configure digital display unit that can receive and display all the dispatching messages and text messages sent from the dispatching center and it can also send all the status messages by shortcut key. The mobile terminal can roam automatically among the whole network, with the functions such as local call, cross-base call, individual call, group call, system call and alarm call and some optional functions such as line call, data transmission and GPS location.
Each base station has wireless coverage of 15km (radius) for portable radios and 30-40km(radius) for mobile radios. The coverage area depends on the landform and antenna position.

System feature

System Advantage

1. Technology
2. GMSK modulation mode is applied for the traffic channel, which allows the transmission of digital voice instead of analog voice. The traffic channel can handle data service with data transmission speed of 8Kbps (up to 16K bps)
3. Better voice quality, advanced arithmetic

Based on the high quality voice-encoding method (ACELP), the same as Tetra system, the system ensures the voice quality better than MOS4.0.

1. Simultaneous transmission of both voice and data.
2. Compatibility and develop

Can be easily upgraded to TETRA system, and is backwards compatible with existing MPT1327 system. Better encryption performance of voice and data.

1. High-speed data transmission (traffic channel long data transmission function) and GPS location function.
2. System control signal adopts standard MPT1327 mode. User dial mode adopts MPT1343 standard.
3. Advanced single-spot fault-free design, ensuring the system stability.
4. The heating plug-pull function of the control units meets the need of the modern working mode.
5. Modular structure design, easily expanding and upgrading.
6. With multiple analog and digital exchanging interfaces, system can be easily linked to other communication network.
7. Besides as local trunked system mode, the base station can become radio extend base-station of other MPT1327 system, without special linked line and signal.
8. System supports multiple network modes: star network, ring network and mixed network.
9. System has optional function of voice-code digital encryption, ensuring high-level secure communication.

System Reliability

1. System design and manufacture is in accordance to army ‘s standard.
2. We have passed ISO 9001-2000 certification. Through the strict product flows and system testing flows, the reliability of the equipment out factory are greatly raised.
3. Excellent after-sale service.

System Basic Characteristic

1. Realize voice exchange between radio user;
2. All of parameters can be set up flexibly by maintainer;
3. Realize communication between radio to radio and wire to radio.
4. Realize short data transmission, state info and long data transmission;

System Capacity

• 512 x512 exchange
• 32 MFC, 32DTMF
• 30 sites and 600 channels at maximum
• 100,000 users and 500,000 billing records
• 30 E1 interface
• Dial tone, busy tone, 32 voice tone indication
• 24 routes wire users;
• 3 routes E1 relay.
• VHF, UHF all frequency band.