flexiPHY is Octasic’s software product line that implements the Physical Layers (PHY) for Small Cell Basestations (BTS), ranging from indoor Femto cell to outdoor Micro cell and offering a cell size of up to 20 km in rural areas  and user capacity of up to 64 users.

The flexiPHY line consists of five Software Defined Radio (SDR) products that address the 3GPP cellular standards GSM/GPRS/EDGE, CDMA 2000, UMTS/HSPA and LTE. Network listen supplied by Octasic Radio Utility System (RUS) can be used for Self Organizing Network (SON) capabilities.

All five flexiPHY products are designed to run on any hardware platform based on the Octasic Opus2 OCT2224W System-on-a-Chip (SoC). flexiPHY resides primarily on the OCT2224W SoC and the API resides on the Host CPU (i.MX6 ARM A9 processor on OCTBTS 3000/3500/8000 or Intel®  processor on the OCTBTS 3600). To use flexiPHY with either the OCTBTS 3000 platform or the OCTBTS 3600 platform takes a software-only upgrade.

Each flexiPHY is offered pre-integrated with protocol stack and core networks provided by our partners. 

flexiPHY products are available through source code or object code licenses. 

  • GSM, HSPA, LTE Physical Layers
  • Cell size of up to 20+ km
  • Network Listen for GSM, UMTS, LTE 
  • Integrated RF Driver


  • Runs on any Octasic hardware platform based onOctasic's Digital Signal Processors (DSP)
  • Scalable to two or more DSPs to run multiple cells or to increase capacity/number of users
  • Can be ordered with source code or object code licenses
  • Easy customization through Opus Studio development toolkit


  • FlexiCell - Self-contained network-in-a-box (NIB)
  • Emergency, Public Safety, Recovery, First Responder network, and Private Networks
  • Mesh network and Custom waveforms
  • Rural network coverage extension to PLMN
  • Small Cell-based commercial cellular network
  • Customized projects - For customers wishing to develop their own PHY layer or customize flexiPHY software with proprietary features, Octasic offers a complete development toolset for the OCT2200 series of devices. Opus Studio, an integrated development environment (IDE), provides the necessary tools for code editing, compiling, simulation, debugging, profiling, with RTOS and device drivers.
  • GSM/GPRS/EDGE modems
  • Support of all GSM bands: 450MHz, 850 MHz, 900 MHz, 1800 MHz, 1900 MHz
  • Support of 7 to 47 UEs per DSP (multi-TRX)
  • Cell size of up to 35 km
  • Full rate, AMR Full rate and Half rate voice codecs
  • CS-1 to CS-4 and MCS-1 to MCS-9 data channels
  • Measurement reporting
  • L1 interface pre-integrated to commercial partner protocol stacks
  • Integrated RF Driver
  • Compatible with CDMA2000 1xRTT
  • Support of bands 850 MHz, 1900 MHz, 450 MHz
  • Support up to 32 UEs
  • Cell size of up to 27 km
  • Radio configuration RC1, RC2 and RC3
  • Integrated with Octasic BSC protocol stack
  • Integrated Octasic HLR
  • Compatible with 3GPP Release 6
  • Support of all UMTS bands
  • Support up to 32 UEs per DSP
  • Circuit Switched (CS) Voice
  • HSDPA/HSUPA throughput of 12 Mbps downlink, 2 Mbps uplink
  • Multi Radio Access Bearer (MRAB)
  • Cell size of up to 20 km
  • Crest Factor Reduction
  • Integrated MAC-e and MAC-hs schedulers
  • L1 interface pre-integrated to commercial partner protocol stacks
  • Integrated RF Driver
  • Compatible with 3GPP Release 8 LTE-FDD/TDD eNodeB
  • Support for all LTE bands
  • Support for 1.4, 3, 5 ,10, 15, and 20 MHz bandwidths
  • Throughput of 30 Mbps downlink, 15 Mbps uplink
  • Cell size of up to 20+ km
  • 2x2 MIMO
  • Crest Factor Reduction
  • FAPI interface pre-integrated to commercial partner protocol stacks
  • Integrated RF Driver
  • Radio Utilities System (RUS)
  • RF design tools:
    • RF Playing
    • RF Recording
  • SON and REM tools
    • GSM network listen
    • UMTS network listen
    • LTE-FDD/TDD network listen
    • CDMA2000 network listen
  • Reference clock sync with external base stations