Excera DMR Tier III Trunking Pro VR-3, developed on ETSI DMR open standards, is an IP-based and soft switching-adopted digital trunking system infrastructure designed to provide interconnection for base stations across various geographic areas. Automatic roaming is available for radio units (MSs) in the network coverage. The Mobile Switching Center (MSC) in the system has its backup and each base station can operate in single site mode with less capacity when the MSC is down. MSs in the system can communicate with PSTN/PABX and SIP phones and MSs in the MPT trunking system and DMR conventional system. The Network Management System (NMS) supports SNMP and adopts (Browser/Server) B/S structure. This system provides AIS interface for further development, such as dispatching application.
VR-3 digital trunking simulcasting system which is based on DMR T3 standard with the latest digital trunking simulcasting technology. It features good voice quality, high spectrum utilization, strong security and confidentiality, flexible and reliable networking and easy interconnection.VR-3 digital trunking simulcasting system integrates voice communication, data transmission, command and dispatching functions, realizes intelligent management of work groups on the same platform, and brings powerful and excellent communication experience of digital age to users. Its powerful business functions and multiple extension applications can help improve daily operation and management efficiency and enrich management means of enterprises.
?Full IP architecture.
?Support GPS positioning.
? More safety with encryption.
?Large capacity and big regional coverage flexible networking.
?Digitalized voice and enhancing the anti-jamming ability, which ensuring the good voice quality.
?No base station controller server design with higher reliability and lower cost.
?Adopt dual time slot TDMA technology and spectrum utilization is four times of MPT1327 system.
?Seamless hand-over and keep continuous communications when trans-regional.
Main Technical Patameters
?Signaling Standard ETSI DMR/PDT
?Frequency Range 300-360MHZ/350-400MHZ/400-470MHZ/450-520MHZ/136-174MHZ
?Working Mode TMO/RMO
?Channel Space 12.5KHZ/TwoTime-Slot
?Connecting Time(Single BS) <240ms
?Connecting Time(Multiple BS) <700ms
?Networking Interface E1/IP
?Access Interface 10/100M Auto-adaptable Ethernet Interface
?Working Voltage 220V AC
?Max MSC Capacity No limited
?Base Station Capacity No limited
?Carrier Capacity per MSC More than 400
?Carrier Capacity per Base Station 32
System Key Features
Modularized design and multi-level fault-tolerant capability for enhanced reliability and e?ciency.Interference monitoring and link detection features guarantee the high performance of the system. Redundancy capability for key hardware components such as base station control unit and trunking main control channel.
MSC supports local and geography redundancy mechanism. When one fails, the other one can take over its services immediately.
Private call, group call, emergency call, broadcast call, all call, phone call (PSTN and PABX), call via MPT gateway and call via DMR conventional gateway.
Long and short text message, GPS polling, status message, emergency alarm and packet data.
Late entry, ambience listening, monitor, talk group scan, override/ interrupt, dynamic group number assignment, call recording, dynamic base station assignment, call priority, call duration limitation, talk group hunt, subordinate group call, super group call, group call merging, full duplex private/ group call, OTAP, TX pre-empt, queue, call display, call alert, talker ID identi?cation, call permission, group patching, channel monitor, call forwarding and call end alert.
ESN check, authentication, kill/stun/revive and end-to-end encryption.
Registration, additional authentication & registration, deregistration, roaming, handover and participant group attachment.
Con?guration management, subscriber management, fault/alarm management, device management, performance management, security management, log management, system topology presentation and remote management and upgrade.
?Powerful Dispatching Services
The client/server structure ensures networking and user-friendly operation interface and versatile functions: voice call, text message, visible dispatching, track playback, channel monitor, log management, multiple screen and touch screen.
Recording, playback and statistics & analysis.
Fully compliant with DMR Tier 3 technology which born with the advantage of big coverage over other technologies.Non-linear ampli?er.
The IP-based architecture enables ?exible networking.
Di?erent gateways are provided to connect with other system, such as PSTN, MPT, Tetra, FM, DMR conventional, etc.
?High Spectrum E?ciency
?Base Station Antenna
?DMR Repeater (ER9000)
?Mobile Switching Center(VR-3100)