Enterasys Networks CSX7000 Manuel d'utilisateur télécharger pdf (Page 97)

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101

Central Site Remote Access Switch 97

ARDWARE

NSTALLATION

Connecting Adapter Inter-Board Cables

CAUTION:

Failure to line up triangles on LCD cable and WAN adapter’s “1” label may result in

damage to the LCD.

SUMMARY OF GUIDELINES

CABLING GUIDELINES

Now that you have attached all the inter-board cables, refer to the connector-type table and verify

that:

1. On BRI-4, PRI-8, PRI-23 and Expander adapters, all TDM bus connectors are connected by a flat

bus cable.

2. On PRI-23/30 only configurations, all MVIP bus connectors are connected by a flat bus cable.

A TDM bus is not used.

3. If mixing PRI-23/30s with BRI-4s or PRI-23s, use both an MVIP bus and a TDM bus.

4. When a Digital Modem adapter is installed, it needs to connect to the bus through its MVIP

connection.

• If part of a PRI-23/30 configuration: the DM adapter is part of the MVIP bus.

• If part of a PRI-23 configuration: you need two buses: one TDM bus for WAN card connec-

tions, and one MVIP bus connecting DM adapter with MVIP adapter of the PRI-23.

• If adapters with only TDM connectors are installed (BRI-4 and PRI-8) and if a DM adapter

is installed, then a crossover cable must interconnect the TDM and MVIP buses.

ERMINATION GUIDELINES

On MVIP adapters, the MVIP bus should be terminated on both ends of the bus. Ideally, it should

be terminated on the MVIP adapter closest to the CPU (usually the PRI adapter). It should also be

terminated at the Digital Modem end, on the adapter farthest from the BRI, PRI, or Expander

adapter. Termination is enabled by jumpers on DM-8, and switches on the DM-24, DM-24+ or DM-

30+, as described earlier. All other MVIP jumpers/switches on all other adapters on the MVIP bus

should not be terminated.

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Enterasys Networks CSX7000 Manuel d'utilisateur Page 97

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