Specifications

RoadRunner USERS GUIDE

where type can be either X.21, X.21XTA or RS422.

Select RS422 when connecting the RoadRunner to any RS422 network

interface. When connecting to any X.21, RS449 or RS530 interface, select

X.21XTA if the external network interface device recognizes a change-

of-state of the DTR/CON line. This enables the RoadRunner to

terminate the connection when you press the END button. Otherwise,

select X.21 as the interface type.

V.35 Using the DIF102 Digital Interface

Each interface defines a voltage level for each of the signals. In the case

of V.35 and X.21, a connector type is defined as well. The large,

rectangular block connector defined in the V.35 specification is not used

by the RoadRunner because of its size. Instead, a smaller DB15

connector is used. In the case of the V.35 interface, the RoadRunner

conforms to the electrical specification but requires an adapter cable to

convert the DB15 connector to the connector specified in the V.35

specification. The connector and the pin-out chosen for the V.35

interface in the RoadRunner are a common deviant found in many

systems. An adapter cable is available from MUSICAM USA or

distributors, or can be made following the diagram found in Appendix

B. It is important to remember that V.35 has a separate clock for

transmitted and received data.

Once the DIF102 module is installed, select the appropriate interface

type from the RoadRunner menu:

where type can be either V.35 or V.35XTA.

When connecting to any V.35 interface, select V.35XTA if the external

network interface device recognizes a change-of-state of the DTR/CON

line. This enables the RoadRunner to terminate the connection when

you press the END button. Otherwise, select V.35 as the interface type.

ISDN Using the TA101 Terminal Adapter

The TA101 Terminal Adapter plugs directly into the RoadRunner and

provides an ‘S/T’ interface to ISDN. The S/T interface requires an NT-