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 50 km in rural areas and user capacity of up to 32 users per DSP.

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 scan 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 (DSP). flexiPHY resides on the OCT2224W and the protocol stack resides on the Host CPU (i.MX6 ARM A9 processor on OCTBTS 3000/3500/8500 or Intel® processor on the OCTBTS 3600). Core network can reside on The Host CPU or run externally to Octasic platform. To use flexiPHY on any Octasic 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.

Download Product Brief


  • Runs on any Octasic hardware platform based on Octasic’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


  • GSM/GPRS/EDGE modems
  • Support of all GSM bands: 450MHz, 850 MHz, 900 MHz, 1800 MHz, 1900 MHz
  • Support of 7 to 14 UEs per DSP (Multi-TRX)
  • Cell size of up to 35 km
  • Throughput of 140/140 Kbps for Downlink/Uplink (Not simultaneous, depending on UE type)
  • Full rate, Half rate voice codecs
  • CS-1 to CS-4 and MCS-1 to MCS-9 data channels
  • Measurement reporting
  • Integrated to Octasic GSM/GPRS protocol stacks and OpenBSC


CDMA 2000

  • 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
  • Throughput of 80/20 Kbps for Downlink/Uplink
  • 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 for voice and HSDPA, 8 UE for HSUPA
  • Circuit Switched (CS) Voice
  • HSPA throughput of 14/2 Mbps for downlink/uplink
  • Multi Radio Access Bearer (MRAB)
  • Cell size of up to 20 km
  • Crest Factor Reduction
  • 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 30/12 Mbps for Downlink/Uplink in FDD
  • Throughput of 12/5 Mbps for Downlink/Uplink in TDD with configuration 1
  • Cell size of up to 50+ km
  • MIMO (Transmit and receive diversity)
  • VoLTE support
  • Crest Factor Reduction
  • FAPI interface pre-integrated to commercial partner protocol stacks


RUS (Radio Utilities System)

  • RF design tools:

– RF Playing

– RF Recording

– RF Loopback

  • SON and REM tools

– GSM network listen

– UMTS network listen

– LTE-FDD/TDD network listen

– CDMA2000 network listen

  • Base station Automatic Synchronization System (BASS)

– GSM support

– Bind Synch