M-DOTS Optical Master Units – OMUs

The 19″ rack-mountable M-DOTS™ – OMU is typically located at a Base Station or a facility housing a suite of Base Stations. On the forward path, the OMU receives the RF signals from the BTS and digitizes the designated RF bands and digitally transports them over single mode fiber to the Remote Units. On the reverse path, the OMU receives the digitized RF signals from the Remote Unit and converts them back to RF for the BTS.

With ultra-wide bandwidth RF front-end design enables each M-DOTS™ OMU supports up to six RF bands. All each RF band can be configurated to be FDD or TDD mode in factory and supports up to 100MHz bandwidth RF signals in order to be capable of simulcasting signals for multiple bands/technologies/operators and MIMO, even ultra-wide bandwidth requirement for future 5G NR TDD.

Each M-DOTS™ OMU has four 10Gbps SFP+ digital optic ports and supports up to 32 ORUs by star, chain, ring and hybrid network topologies, even up to 196 ORUs by adding OEUs in some scenarios, such as subways and tunnels.

The OMU utilizes an embedded WEB management system for system configuration and network monitoring. The embedded WEB management system collects alarm information from both OMUs and ORUs. For multiple link deployments, multiple cascade OMUs networked together by switcher at same BTS site.

  • 19″ rack-mountable design
  • Full digital software and hardware platform with Ultra-wide RF front-end design and enables multiple bands/technologies/operators and MIMO, even ultra-wide bandwidth requirement for future 5G NR
  • Supports up to six RF bands and up to 100MHz bandwidth RF signals per bands
  • Each RF bands can be configurated to be FDD or TDD mode in factory and supports synchronization for TDD-LTE multi-Channel
  • Ultra-wide band (400MHz DL and 400MHz UL on one fiber core, dual cores double to 800MHz DL and 800MHz UL) adaptable to all Global Communications Bands, 2*2 and 4* 4MIMO, now and future 5G NR
  • GUI based Spectrum Analyzer (Option)
  • 2*RJ-45 Port for Local Control and Alarming on an IP Web Browser GUI
  • Each M-DOTS™ OMU has four 10Gbps SFP+ digital optic ports and supports up to 32 ORUs by star, chain, ring and hybrid network topologies, even up to 196 ORUs by adding OEUs in some scenarios, such as subways and tunnels.
  • SNMP V2 & V3 support with a MIB File
  • Supports Remote Control via wireless modem

Electrical Specification

Frequency Range: Band 5: 824-844 MHz / 869-889 MHz

Band 8: 890-915MHz / 935-960MHz

Band 3: 1710-1785MHz / 1805-1880MHz

Band 1: 1920-1980MHz / 2110-2170MHz

Band 40: 2300-2400MHz

Band 41: 2500-2600MHz

Uplink RF Output Power per Band: -10±2dBm

System Group Delay: ≤5µs (1 Master and 1 Remote exclude the optical fiber delay)

System Uplink Noise Figure @ Max Gain: ≤ 7dB (1 Master and 1 Remote)

Delay Correction Range: ≥100µs (Manual or Automatic)

Transport Protocol: CPRI

Max Input Power without Damage: UL: ≤-10dBm

Spectrum Analysis: Built-in downlink output spectrum analysis

Power Supply: 220V AC (Dual redundant power supply support)

External and Antenna Connection

Connector: RF: N-Type Female

Optical: LC

Monitoring: RJ-45

Local Alarm Indications: LED alarm display

Number of Digital Optical Port: 4 digital optical port per OMU support 16 ORU’s with loop redundancy

Mechanical Specification

IP Rating/Cooling: IP 40

Temperature Range: -25℃ to +55℃

Relative Humidity: Max 95%

Dimension: 19” 2U

Weight: Max.10kg