GPON ONT System-on-Chip offers multiple interfaces.

Press Release Summary:

Dedicated for GPON (ITU-T G.984) network, PAS7401 is used to build power- and performance-optimized GPON ONT in Single Family Unit (SFU), Multiple Dwelling Unit (MDU), or similar configurations. It integrates GPON SERDES, MAC, and packet-processing functions together with ARM9 controller, dual Gigabit Ethernet UI, TDM interface, and dedicated DSP for VoIP processing. Simultaneous and sustained 2 Gbps downstream and 1.244 Gbps upstream throughput is provided at all packet sizes.

Original Press Release:


The PAS7401 is PMC-Sierra's second generation GPON ONT System-on- Chip (SOC), dedicated for use in a GPON (ITU-T G.984) network. The PAS7401 is an optimized device for building a high-performance, extremely low-power and low-cost GPON ONT in Single Family Unit (SFU), Multiple Dwelling Unit (MDU), or similar configurations. The PAS7401 integrates the GPON SERDES, MAC and packet-processing functions, together with an integrated ARM9 controller, a dual Gigabit Ethernet user interface, a TDM interface, and a dedicated DSP for VoIP processing.

The PAS7401 is based on PMC-Sierra's field-proven GigaPASS networking architecture, which provides market-leading throughput and quality of service (QoS). The PAS7401 provides simultaneous and sustained 2 Gbit/s downstream and 1.244 Gbit/s upstream throughput at all packet sizes. The GigaPASS networking engine provides TR-101 based networking features, compliant with FSAN CTS specifications, including 802.1p/q bridging, packet classification, filtering and queuing, traffic shaping and policing.

  • Full ITU-T G.984 GPON ONT functionality with integrated CPU and a comprehensive software package
  • GigaPASS Wire-speed performance - Simultaneous 2 Gbit/s downstream and 1.244 Gbit/s upstream sustained throughput at any packet size.
  • Advanced classification engine - supports classification, mapping and filtering according to L2/L3/L4 fields, double-tagged VLANs, MLD and IGMP multicast.
  • Advanced QoS features - flexible queuing features enable queuing per user/service with WFQ/SP scheduling, shaping, and policing per queue
  • Power down modes - supports SuperSave power down mode, which enables up to 95% ONT power reduction during power outages and standby periods
  • High Integration and RBOM optimization
  • Interoperability - PAS7401 uses PMC field-proven GPON protocol stack and is guaranteed to provide the highest level of interoperability
  • Low Power - Typical 1 W at 1 Gbit/s throughput

  • ITU-T G.984 compliant GPON ONT SOC
  • Line rate operation - 2.488 Gbit/s downstream; 1.244 Gbit/s upstream
  • Supports 8 T-CONTs
  • Supports 256 Port-IDs
  • Supports NSR/SR DBA
  • US and DS FEC
  • AES decryption
  • Integrated SERDES and CDR
  • Embedded ARM926 controller
  • Embedded VoIP subsystem supports four fully-featured VoIP channels
  • Throughput - 2 Gbit/s downstream and 1.244 Gbit/s upstream at any packet size
  • 802.1x authentication engine
  • 802.3x flow control at the UNI
  • Multi-protocol classifier includes:
  • Ethertype
  • L2/L3/L4 source and destination address/IP/Port; IPv4/IPv6 support
  • Single/Double VLAN table; VLAN insert/remove/exchange operations
  • DSCP
  • Multicast group (MLDv2 and IGMPv3)
  • QoS and Traffic Shaping features:
  • Internal frame buffer, dynamically shared between US and DS
  • Multiple queues in upstream and downstream with flexible mapping, shaping and scheduling per user/service
  • Per Port-ID upstream configurable rate limiter and coloring
  • Broadcast rate limiting
  • 416-pin BGA package, 27 mm x 27 mm, industrial temp grade
  • 1 W typical, 1.5 W thermal power consumption at 1 Gbit/s throughput

    PAS7401 is provided with a comprehensive, turnkey-level software package which includes:
  • Fully featured GPON protocol stack and networking drivers
  • Fully featured ONT OMCI stack
  • Complete DSP driver package
  • G.711, G.729a, G.729ab, G.723.1 Codecs
  • RTP
  • Flexible API for 3rd party SIP integration
  • Sample SIP application
  • Based on Linux 2.6 kernel
  • Maintains API compatibility to Chicago chipset
  • API enables integrating 3rd party protocol stacks and applications

    The PAS7401 reference platform is a fully featured GPON ONT. It is available in the following configurations:
  • Indoor ONT with 1 x PON, 4 x GE, 2 x POTSs
  • SFU with 1 x PON, 1 x GE, 2 x POTS, and Home Network adapter

  • 2.488/1.244 Gbit/s GPON port with integrated CDR/SERDES
  • 2 x GMII/MII Ethernet ports with optional 802.3ad link aggregation for connectivity to standard switch ICs or PHY devices
  • TDM - Dual DS1/E1 direct framer connection
  • Voice - 2 x dual SPI/MPI interface for direct connection to SLIC/SLAC devices supports up to 4 x FXS ports
  • 16-bit DDR2 SDRAM memory
  • 32-bit memory controller for flash and peripherals access
  • 16 x dedicated GPIO and 5 x alarm inputs, 12 x LED outputs
  • UART and JTAG interfaces

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