Isi Board Cabling; Serial Card Upgrades - Multitech CommPlete 4000 Series User Manual

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ISI5634PCI/8 Board
RJ12 Line Jacks
Figure 2-3: ISI Board Connectors (ISI5634PCI/8 shown; 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.
Figure 2-3b. Top Slots Require Identical Devices

Serial Card Upgrades

As shown in Figure 2-3c, installation of expansion cards is simpler in the outer slots than in the
inner expansion slot.
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CommPlete 4000 Communications Server Overview