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Dialogic DSI SPCI Network Interface Boards manual Geographic Addressing, Watchdog Timer

Models: DSI SPCI Network Interface Boards

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Dialogic® DSI SPCI Network Interface Boards Programmer's Manual Issue 5

4.5Geographic Addressing

Geographic Addressing allows the logical position of a board (or board_id) in a system to remain the same irrespective of the addition or removal of other boards on the PCI bus. Two address modes are supported:

•PCI address mode – (default) addressing determined by enumerating boards on the PCI bus at boot time (i.e., the default order found by the operating system).

•Switch address mode - determined by a 16 position ADDR switch on the board.

The configuration of Geographic Addressing is controlled by command line parameters to the ssds utility. See section 8.1 ssds for details.

4.6Watchdog Timer

An optional host to board watchdog timer may be configured. This allows the board to detect a failure of the host software. If such a condition is detected, then the board goes into a reset state. This prevents a condition whereby the software on the host has stopped running but the boards still presents an "in- service" condition to the remote end.

This functionality is controlled by command line parameters to the ssds utility. See section 8.1 ssds for details.

4.7Using the CT bus

The SPCI2S and SPCI4 boards support two or four T1/E1 Line Interface Units and a CT bus interface (H.100) respectively. The on-board signaling processor handles the SS7 signaling timeslots whilst the remaining circuits (voice or data bearer circuits) are passed to the CT bus for distribution to other boards.

All communication between the application and the board is message-based. Initial configuration is usually handled by the configuration utility s7_mgt, which takes commands from the text file (config.txt) and generates all the necessary configuration messages for the board. Subsequent operation is entirely message driven, messages being passed in both directions between the board and the application.

One of the roles of the application is to control the dynamic switching between the CT bus and the T1/E1 line interfaces. This section provides details of how to interface with the CT bus, including the initial (static) configuration and the subsequent (dynamic) switching.

The operation of the CT bus switching interface is described in terms of the SCbus switching model using the messages MVD_SC_DRIVE_LIU, MVD_MSG_SC_LISTEN and MVD_MSG_SC_FIXDATA and config.txt commands LIU_SC_DRIVE and SCBUS_LISTEN.

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Dialogic DSI SPCI Network Interface Boards manual Geographic Addressing, Watchdog Timer, Using the CT bus
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DSI SPCI Network Interface Boards specifications

Dialogic DSI SPCI Network Interface Boards are highly advanced and versatile communication solutions tailored for the demands of modern telephony and multimedia applications. These boards are designed to efficiently process voice, data, and signaling, making them an essential component for businesses looking to enhance their communication capabilities.

One of the standout features of the Dialogic DSI SPCI boards is their ability to handle multiple telephony protocols. This flexibility allows users to connect to various network types, whether PSTN, VoIP, or legacy systems, ensuring seamless interoperability. The boards support industry-standard protocols such as ISDN, SS7, and SIP, enabling integrated communication across diverse platforms.

The technology behind the Dialogic DSI SPCI boards incorporates state-of-the-art digital signal processing (DSP). This powerful DSP architecture provides efficient encoding and decoding of voice and video signals, leading to enhanced call quality and reduced latency. Moreover, the DSP technology supports advanced codecs, ensuring that voice communication is clear and intelligible, even over bandwidth-limited connections.

Another significant characteristic of these boards is their scalability. Organizations can start with a single board and expand their telecommunication capabilities as their needs grow. This scalability makes them suitable for a wide range of applications, from small businesses to large enterprises, allowing for easy integration into existing infrastructures.

In addition to their powerful processing capabilities, Dialogic DSI SPCI boards also prioritize reliability and robustness. They are designed with a focus on fault tolerance, ensuring that telephony services remain uninterrupted even in the event of hardware failure. This resilience is critical for mission-critical applications where downtime can lead to significant revenue loss.

Furthermore, the boards feature extensive application development support. Developers can leverage the Dialogic API and various development kits to create custom telephony applications that meet specific business requirements. This programmability opens the door to innovative solutions, such as interactive voice response (IVR) systems, automated call distribution (ACD), and customer relationship management (CRM) integration.

In summary, Dialogic DSI SPCI Network Interface Boards are a cornerstone for organizations looking to innovate their telecommunication systems. With their support for multiple protocols, advanced DSP technology, scalability, reliability, and development support, these boards empower businesses to optimize their communication strategies and adapt to the evolving landscape of digital interaction.