Multi-Tech Systems Hub manual ISI Board Cabling

Chapter 2 - Installing Your CommPlete 4000

ISI Board Cabling

Each Intelligent Serial Interface card (ISI5634PCI/8, ISI5634UPCI/8, ISI4608PCI, ISI4608UPCI or ISIHP-2S/2U) takes up one physical slot in the CommPlete 4000. Depending on your configuration, you may have as many as four of these cards (see Figure 2-1). Attach the line cords (RJ-12 for analog phone lines; RJ-45 for UPCI or ISDN phone lines) to the line connectors on the ISI card(s) at the back of your CommPlete 4000 as shown in Figure 2-3.

ISI5634UPCI/8

RJ45 Line Jacks

Modem	Modem
Line	Line
1-4	5-8

MODEM LINE 1-4 MODEM LINE 5-8

RJ12 Line Jacks

ISI5634PCI/8 Board

Figure 2-3: ISI Board Connectors (ISI5634PCI/8 and ISI5634UPCIshown;

other MultiModem ISI cards differ)

Note: Any cables connected to the CommPlete 4000 should be shielded to reduce interference.

Note that the two top expansion slots share a data interrupt signal on the PCI bus. Consequently, if both slots are used, they must be occupied with identical devices (and the device drivers must be identical). This is a constraint of PCI bus architecture. Also, the device drivers must support “interrupt-sharing.” The drivers for the MultiTech ISI card do support interrupt-sharing

Shared Interrupt

for Top Slots.

Identical Devices Required.

You can not mix PCI &UPCIcards in these two slots, because they use different drivers.

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Figure 2-3b. Top Slots Require Identical Devices

10 CommPlete 4000 Communications Server User Guide