Black Box LR1530A-R3 manual WAN Interface Connection, Pinout Information, CSU/DSU Module

Servicing Information

WAN Interface Connection

Pinout Information

The router is manufactured with three different WAN link modules: V.35, LXT411 CSU/DSU or Universal WAN. The type installed may be determined from the label above the WAN link output connector on the back of the router.

V.35 Module:

The V.35 link interface is provided as a DB25 connector on the back of the bridge/router, so an interface converter is needed to convert to the standard V.35 connectors.

When connecting two bridge/routers back-to-back without modems, a null-modem cable is required to crossover the pins on the links. Crossing over the pins allows two bridge/routers both configured as DTE interfaces to be connected together. With this configuration, both bridge/routers will provide clocking for the links, and each bridge/router must have a link speed defined.

CSU/DSU Module:

Routers with an LXT411 CSU/DSU interface module use a standard RJ45 service connector, pinout specification RJ48S.

56/64

CSU/DSU

Figure C-4 Rear View of the CSU-DSU Connector

78