USER’S GUIDE

CONNECTING ADAPTER INTER-BOARD CABLES

There are three possible cables used to connect adapters: flat, crossover, and LCD. Flat cables connect adapters with like connectors, and crossover cables connect the flat cables of adapters with differing connectors. LCD cables apply to former Network Express products (NE2000-II, 4000, 5000) only. These cables connect the system’s liquid crystal display (LCD) to the WAN adapter group.

CONNECTING MULTIPLE ADAPTERS

WAN and DM adapters need inter-board cables to communicate with each other over an inter- board bus. (LAN, V.35, RS232 and encryption adapters never require inter-board cabling.) The WAN adapters use either a Time Domain Multiplexing (TDM) bus, a Multiple Vendor Integration Protocol (MVIP) bus, or both. The DM adapters use an MVIP bus only. Each adapter has at least one bus connector, and some (such as the PRI-23 and PRI-23/30) have both.

The following table classifies the adapters according to inter-board connector type:

Adapter

Inter-Board Connector Type

 

 

LAN (Ethernet)

(none)

 

 

V.35

(none)

 

 

RS232

(none)

 

 

BRI-1

(none)

 

 

BRI-4

TDM

 

 

PRI-8

TDM

 

 

PRI-23

both TDM and MVIP

 

 

PRI-23/30

both TDM and MVIP

 

 

Expander

TDM

 

 

DM-8

MVIP

 

 

DM-24

MVIP

 

 

DM-24+/30+

MVIP

 

 

encryption (DES/RSA)

(none)

 

 

All TDM and MVIP connectors, if present, are along the top of the card as shown in the System Adapters Appendix. If you are unsure of the location of the adapter’s connectors, refer to the adapter illustrations for clarification.

The type of inter-board bus (or buses) you should install depends upon your unique system configuration. The following suggestions should help you achieve the cleanest connections:

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Enterasys Networks CSX6000, CSX5500, CSX7000 manual Connecting Adapter INTER-BOARD Cables, Connecting Multiple Adapters