6.1 MSI Hardware Overview

MSI/SC, MSI/SC-Global, and MSI/PCI-Global Series boards make up this hardware family.

• The MSI/SC product series consists of an ISA form factor baseboard that includes 8 integrated station interfaces and allows up to two additional daughterboard modules, each with an additional 8 station interfaces. The baseboard-only product is referred to as an MSI/80SC. A baseboard with one daughterboard module is referred to as an MSI/160SC (16 station interfaces), and a baseboard with two daughterboard modules is the MSI/240SC (24 station interfaces). The MSI/SC feature set is based on the Dialogic MSI-C board; however, its hardware architecture is based on the D/41ESC board. This allows the MSI/SC to take advantage of the D/41ESC BLT (board locator technology) circuit, programmable interrupts, and shared RAM interface. In addition, the MSI/SC board provides a ringing option, making it capable of generating AC voltage sufficient to ring standard 2500 type telephones.
• The MSI/SC-Global boards support a ringer for each station attached to the board with two RENs (Ringer Equivalency Numbers) per station. MSI/SC-Global also features an international approvability.
• The MSI/PCI-Global product is a modular station interface board containing a digital signal processor (DSP) and the H.100 (CT Bus) connector for operation in SCbus mode. The MSI/PCI is also completely API- and feature-compatible with the MSI/SC ISA products. The MSI/80PCI-GBL consists of a baseboard and one SI/80PCI-GBL daughterboard module supporting eight station interface circuits and the MSI/160PCI-GBL is a baseboard product with two SI/80PCI-GBL daughterboard modules providing 16 station interface circuits.

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