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SigMGSS-cPCI VoP Network / Telephony Carrier Board for Media Gateway and Soft-Switch Applications

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SigMGSS-cPCI board front panel shown above



The SigMGSS-cPCI board provides an IP-ready, high-connectivity, high channel density platform for media gateway, soft-switch, and other VoIP and VoATM infrastructure and carrier class products.

Unlike less powerful boards with lower channel capacity, the SigMGSS-cPCI board does not attempt to force data processing through one or even more PowerPC or similar devices. Instead, the SigMGSS-cPCI routes data onboard via high-bandwidth Utopia and TDM busses, and uses the PowerPC for what it does well: host interface, command, control, and real-time operating system (in this case, Linux).

The SigMGSS-cPCI board is particularly well suited for cPCI embedded telecom and Internet equipment OEM applications where space is at a premium, consuming only one (1) 6U form-factor slot.

In a typical VoIP or VoATM application, the SigMGSS-cPCI board can flexibly route data under software control to/from DS3 and Ethernet streams to:

  • single or dual DS3

  • single or dual 1 10/100/1000 Mbs Ethernet

  • H.110 bus

  • DSP resource card (e.g. SigC5441-PTMC Card)

  • additional PTMC compatible resource card

SigMGSS-cPCI Feature Summary

  • Hot-swappable 6U format cPCI card

  • PowerPC 8245 300 MHz communications controller, running embedded Linux with 4 to 128 Mbyte DRAM and up to 128 Mbyte boot / FLASH EEPROM

  • Dual, fully channelized DS3 spans: 2 sets of 28 DS1 channels, or 1344 total DS0 channels, available on front panel connectors

  • Dual 10/100/1000 Mbs Ethernet, available on front panel RJ-45 connectors and also routed to IP backplane according to PICMIG v2.16

  • H.110 interface and software-programmable switch (Lucent T8110 device)

  • 33 MHz 32/64 bit host PCI interface (compliant with PICMIG v2.3)

  • Provides an integrated "IP Resource Board" solution when used with SigC54xx-PTMC and SigC55xx-PTMC cards, offering VoP (Voice-over-Packet) functionality fully compliant with Telogy voice software and high-density network packet processing logic, including:

  • 1,536 voice channel capacity

  • TDM PTMC-compliant interface with up to 16 TDM streams on local CT Bus, routed either to H.110 interface or dual DS3 framer on the SigMGSS-cPCI board

  • Utopia Level 1 PTMC-compliant interface routed to dual 1 Gbs Ethernet controller on the SigMGSS-cPCI board

  • Two (2) PTMC v2.15 daughtercard sites

  • Two (2) OMNIBUS module sites support multichannel analog I/O and audio I/O options, with a wide variety of converter types, sampling rates, and anti-alias and reconstruction filter options

  • Supported by VDS, Real-Time Composer™ , DirectDSP® , and Hypersignal® development tools

  • JTAG debug header for PowerPC, C54xx and C55xx DSPs, and other devices

Specifications and Data Sheets

Telogy Software Compliance

If a SigC54xx-PTMC or SigC55xx-PTMC daughtercard is installed, then up to 1536 channels of 64 kbps PCM voice, fax, or data traffic can be processed using the SigMGSS-cPCI card (or up to 3072 channels if two PTMC cards are installed). For example, the SigC5441-PTMC card contains up to 32 (thirty-two) Texas Instruments C5441 devices, and is fully Telogy software compliant. Using Telogy software and onboard packet processing logic, SigC54xx-PTMC and SigC55xx-PTMC cards compress data via G.711 or LBR CODEC to produce packetized voice with RTP header, or fax data using T.38 protocol. For VoIP transmission, UDP/IP header processing is an option; for VoATM transmission compressed voice of fax can be sent using AAL0 / AAL1 / AAL2.

8245 Communications Controller

The processor on the SigMGSS-cPCI board is a Motorola MPC8245 PowerQUICC® II device, with MPC603e core, 64 bit data and 32 bit address bus, running at 300 MHz.

To the 8245 memory bus is connected a standard DIMM module that supports up to 4 to 128 Mbyte DRAM, and to the 8245 PortX bus is connected a boot/FLASH EEPROM device that provides up to 128 Mbyte of non-volatile storage.

The 8245 incorporates an onchip a local PCI bus controller and an RS-232 DUART. One of the RS-232 channels is connected to a console port. A JTAG debug header is available for the 8245.

Dual DS3 Capability

The SigMGSS-cPCI board contains dual, fully channelized DS3 spans, or 1344 total DS0 channels (TDM data). Using a routing PLD under software control, TDM data from the dual DS3 framer switched between the PTMC sites or local CT Bus (see H.110 Interface section below).

The SigMGSS-cPCI board supports complete DS3 to DS0 de-multiplexing and vice-versa. In a typical system configuration, with a DSP resource card such as the SigC5441-PTMC installed, up to 1344 timeslots of TDM data are processed and packetized by DSP / voice codec devices.

All four (4) Rx/Tx DS3 connectors are available on the SigMGSS-cPCI front panel; see Connectors and Indicators section for more detail. On the front panel, Rx and Tx DS3 connectors appear as "vertically stacked" for each DS3 channel; see section SigMGSS-cPCI Front Panel Layout.

Dual 10/100/1000 Mbs Ethernet

The SigMGSS-cPCI board uses a PMC-Sierra PM3386 Ethernet controller with dual 1 Gbs Ethernet line-side interface and POS-PHY L3 system-side interface. A PLD is used to bridge Utopia L1 data from the PTMC sites to POS-PHY 3 on the PM3386.

GMII format output data from the Ethernet controller may be routed to either the front panel or backplane connector J3 (according to PICMG specification v2.16 "cPCI Packet Switching Backplane" guidelines). On the front panel, twin 1 Gbs Ethernet RJ-45 connectors are available (see section SigMGSS-cPCI Front Panel Layout for specific details).

In a typical system configuration, with a DSP resource card such as the SigC5441-PTMC installed, data processed and packetized by DSP / voice codec devices is output to the Ethernet controller for network transmission.

The 1 Gbs Ethernet channels offer an "auto-negotiate" capability and are thus able to interoperate with 10 Mbs or 100 Mbs line-side equipment. The transceivers used on the SigMGSS-cPCI board will auto-negotiate with the remote end to establish the correct bit rate. This provides both interoperability with existing equipment, and future upgrade path to 1 Gbs as needed, with no jumpers on the board and no software reconfiguration required.

The 1 Gbs Ethernet channels also have a "media detect" capability that provide a future upgrade path for optical connections.

H.110 Interface

The H.110 interface is provided by a Lucent T8110 "Ambassador" device and fully supports the ECTF H.110 specification. Local CT Bus data may be switched between the PTMC sites or the dual DS3 controller, under software control.

PTMC Daughtercard Sites

The SigMGSS-cPCI contains two (2) PTMC v2.15 daughtercard sites. Both PTMC card sites are by default set for configuration 3, which provides a TDM local CT Bus interface on PN2, and Utopia Level 1 interface on PN3. The sites are fully compatible with standard PMC cards in terms of physical form-factor and mechanical and connector considerations, and local PCI Bus electrical specifications on PN1 and PN2.

SigMGSS-cPCI Software Support

The SigMGSS-cPCI card, as well as other C54xx/C55xx platforms such as the Texas Instruments DSK C5402 board, are supported by Signalogic off-the-shelf DSP software products designed for DSP-based real-time processing and C54xx/C55xx DSP code development, including:

  • Voice-Over-Packet Development System (VDS™) Software, is targeted at development and test of VoIP and VoATM systems and products.  VDS is an integrated environment that provides simulation analysis, debug, test, and measurement functionality.  The VDS environment implements and monitors packetized voice and audio communication over IP and ATM networks, including LAN, Internet, synchronous serial, and other media.

  • Hypersignal®-Macro and Hypersignal-Acoustic software series, which offer a number of simulation and real-time instrument functions. Simulation functions include DSP and math functions, time domain display (including waterfall, contour, magnitude, unwrapped phase), difference equation, digital FIR and IIR filter design, sampling rate conversion, frequency zoom, wavelet transform, minimum phase calculation, and many more. Instrument functions include spectrum analyzer, digital oscilloscope, stimulus & response measurement, continuous signal generation, real-time; "snap-in"; filtering, continuous disk record and generate, and more.

  • DirectDSP is a Windows library that provides low-level and high-level calls for user-defined C/C++, Visual Basic, MATLAB®, or LabVIEW®programs. The DirectDSP API includes low-level hardware control functions such as reset/run/hold, register access, block memory transfer, DSP executable file download, etc. High-level functions include waveform file acquire/generate, continuous signal generation and execution of any arbitrary Hypersignal DSP or math function. DirectDSP includes strip-chart recorder, digital oscilloscope and digital tape recorder demo program and source code examples.

  • The C54xx/C55xx Source Code Interface contains numerous C54xx/C55xx algorithms and functions in source and binary form, such as optimized FFTs, filters, matrix, transcendental, trig, signal manipulation function, processor and card initialization and analog I/O examples, etc. These functions form the basis of higher-level software functions and instruments; modification can be used to customize Hypersignal or DirectDSP software operation. User-defined C routine hooks are provided for real-time algorithm development. The C54xx/C55xx Source Code Interface can be used as a basic foundation for user-defined real-time DSP systems and products.