Enterasys Networks CSX6000 - Manual (Page 97)

Central Site Remote Access Switch 97
H ARDWARE I 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.
S UMMARY OF G UIDELINES
C ABLING G UIDELINES
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.
T ERMINATION G UIDELINES
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.