M-DOTS™ Digital Multi-Band Optical Transport System

Helios® Public Safety equipment helps to extend the coverage of Public Safety and Critical secure Communications Networks. Helios offers complete and integrated solutions for TETRA, DMR, PMR, P25 and

Helios® Public Safety equipment helps to extend the coverage of Public Safety and Critical secure Communications Networks. Helios offers complete and integrated solutions for TETRA, DMR, PMR, P25 and LTE Networks to ensure coverage of major public infrastructure; such as police stations, garages, power plants, exhibition halls, airports, sports arenas, road and rail tunnels, hotels, convention centers, shopping malls, office towers, parking lots etc.

Helios® Digital Multi-Band Optical Transport System (M-DOTS) is designed to integrate multi-band systems and extend the public safety coverage into large Public Venues, such as Hospitals, Hotels, Shopping Malls, Office Buildings, long Tunnels sections and large area outdoor coverage. 

The M-DOTS consists of a Master Unit (MU), and Remote Units (RU’s). MU consist Optical Master Unit (OMU) and Extension Master Unit (EMU). MU supports up to 48 digital optical fiber port, and each port can support up to 8 remote unit’s in cascading connection. Loop redundancy function can be supported.

M-DOTS is a cost-effective and intelligent solution that can be used in cases when optical master unit and remote unit are not located close to each other. In the downlink, OMU pick up the Multi-Band Base Station signal and covert it to digital signal, and convert digital signal to optical signal, then transport by optical fiber. In RU, digital signal will be changed back to RF signal and then amplified by the high power and high linearity amplifier (HPA), and output to the coverage area.


Key Feature

  • Up to four bands operating supporting major public safety bands including 400MHz, 700MHz or 800MHz.

  • Supports all major public safety technologies include TETRA, DMR, PMR, P25, LTE and LTE MIMO.

  • ALL Digital Software and Hardware Platform.

  • SOC & embedded architecture enable delivery of significantly improved network coverage with very low power consumption.

  • Supports upgrading filter parameters in case of frequency re-farming by software.

  • Better out of band rejection than analog SAW filters.

  • Supports Digital Time Slot based AGC and Squelch functionality for Channelized filter.

  • Dry Contact Input and output Port supported.

  • Band Selective or Channelized based upon Software Defined Filtering, and BW or number of filters can be tunable or upgradeable by software.

  • Supports flexible network topologies such as Star or Cascade connection and Fiber Loop Redundancy.

  • Supports up to 48 Optical Output Ports.

  • Supports up to 192 RU’s with loop redundancy.

  • 8 Remote Unit’s Cascade supported for each Optical Port.

  • Advanced time delay compensation function for each Remote Unit to avoid time dispersion issues.

  • Multiple RF Cards can amplify the same frequency band in order to address LTE MIMO 2x2.

  • Supports up to 10 Gb/s Digital Optical Fiber Speed.

  • RJ-45 Port in OMU Unit to support Local Control and Alarming on an IP Web Browser GUI.

  • External Ethernet or Wireless Modem via 2nd RJ-45.

  • SNMP V3 supported with a MIB File.

  • Built-in 2G or 3G or 4G modem as option for SNMP Trap.

  • Built-in individual AGC & ALC functions for each sub-band for multi-operator and public safety applications.

  • RF composite power +33dBm to +37dBm for medium & large coverage application.

  • Modular scalable architecture of the remote unit allows user to quickly modify, upgrade or expand repeater platform by simply adding additional RF cards and software features.

  • Rated for both indoor and outdoor use with versatile 19" rack mount, wall mounting or pole mounting options.

  • Optional IP-65 waterproof wall mounting or pole mounting case supported for up to 3 frequency band of remote unit.


Application

To expand public safety signal coverage of fill signal blind area where signal is weak or unavailable.

  • Outdoor: Airports, sports arenas, road and rail tunnels etc.

  • Indoor: Hotels, police stations, garages, power plants, exhibition halls, convention centers, shopping malls, office towers, parking lots etc.


SPECIFICATION
  • Frequency

    Up to Four Bands operating supporting all major public safety frequency bands including 400MHz, 700MHz or 800MHz

  • Bands Support

    Supports all major public safety technologies include TETRA, DMR, PMR, P25, LTE and LTE MIMO

  • Filter Design

    Band Selective or Channelized based upon Software Defined Filtering, and BW or number of filters can be tunable or upgradeable by software * Contact your local Helios Solutions sales representative to get more details for multiple sub-bands or channels requirement.

  • Max Gain

    40dB (+/-2dB)

  • Ripple in Band

    +/- 2.5dB

  • Max RF Composite Power

    +33dBm, +35dBm, +37dBm

  • AGC Range

    Max 30dB

  • Noise Figure

    Max 6dB @ Max Gain included 1 Master and 1 Remote

  • Time Delay

    Max 12µs included 1 Master and 1 Remote (depending on filter bandwidth and required adjacent channel rejection)

  • Distance

    Max 20KM

  • Digital Optic Transmission Rate

    Up to 10Gbps

  • Delay Correction Range

    Min 100μs, Automatic or Manually Correction

  • Local Monitor & Control

    LED Indicator and Laptop via IP Web Browser GUI and RJ-45 port to monitor & Control Power on/off, Over Power, Oscillation Detection, Door Status, Temperature, Power Supply, VSWR, Output Power, Gain, ATT and etc.

  • Remote Monitor & Control

    Via Helios Netview OMC Software + Option embedded 2G/3G/4G Wireless Modem + Chargeable Li-ion Battery, SNMP V.3 compatible, Remote IP viewing +External Modem.

  • Connector

    RF: N-type Female; Optical: LC Monitor: 2*RJ-45

  • Mounting Type

    19”Rack Mount

  • Power Supply

    110/240VAC

  • Complies with

    ETSI EN 302 561 V2.1.1, ETSI TS 101 789-1 V1.1.2 (2007-04), EN 301 489-05 V2.2.0, ETSI TS 136 106