PMC Sierra PAS 7401 2nd Generation GPON ONT SOC
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.
Features
- 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
Interfaces
- 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 for debug and control
Reference Design
- 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