flexiPHY is Octasic’s software product line that implements the Physical Layer (PHY) for Small Cell Base Stations (BTS), ranging from indoor Femtocell to outdoor Microcell 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 product line consists of six Software Defined Radio (SDR) products that address the 3GPP cellular standards 5G NR, LTE/LTE-A, UMTS/HSPA, CDMA 2000, and GSM/GPRS/EDGE, as well as Octasic’s proprietary Radio Utility System (RUS), which performs Network Scan and can be used for Self Organizing Network (SON) capabilities.

flexiPHY products run on all hardware platforms based on Octasic’s 3rd generation OCT3032W and 2nd generation OCT2224W SoCs, except for 5G NR and LTE-A, which require an OCT3032W-based platform. On OCT2224W-based OCTBTS platforms, flexiPHY resides on the OCT2224W DSP and the protocol stack resides on the Host CPU (i.MX6 ARM A9 processor). The Core network can reside on the Host CPU or run externally to the Octasic platform. On OCT3032W-based OctNode platforms, flexiPHY resides on the OCT3032W’s Opus3 DSP cores and the protocol stack resides on the embedded quad-core ARM sub-system or on an external processor.

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

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


  • 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


  • 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 50+ km
  • MIMO (Transmit and receive diversity)
  • VoLTE support
  • Crest Factor Reduction
  • FAPI interface pre-integrated to commercial partner protocol stacks


  • 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

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


  • 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

RUS (Radio Utilities System)

  • RF design tools:

RF Playing

RF Recording

RF Loopback

  • SON and REM tools:

5G NR FDD/TDD network listen

LTE FDD/TDD network listen

UMTS network listen

CDMA2000 network listen

GSM network listen

  • Base station Automatic Synchronization System (BASS):

GSM support

Blind Synchronization