Chapter 1 - Introduction and Description

Back Panel Description

All the cable connections to the MultiFRAD are made at the back panel. Four categories of cables are used on the MultiFRAD: Ethernet, Channels, Command Port, and Trunk (RS232/V.35). The back panel connectors are shown in Figure 1-2 and described in the following groups.

 

ETHERNET

10BASE T

AUI

CHANNEL 2

COMMAND PORT

 

CHANNEL 1

TRUNK (RS232/V.35)

POWER

Figure 1-2. Back Panel

Ethernet 10Base-T Connector

The Ethernet 10Base-T connector is used to connect the MultiFRAD to a LAN using unshielded twisted cable. This connector is an RJ-45 jack.

Ethernet AUI Connector

The Ethernet AUI (Attachment Unit Interface) connector is used to connect the MultiFRAD to a LAN using thickwire Ethernet cable. This connector is a 15-pin D-shell female connector.

Channels 1 and 2 Connectors

The two Channel connectors are used to connect data devices to the MultiFRAD. A data device can be a synchronous device such as a multiplexer or an asynchronous device such as a PC. The data channels can be either RS232C or V.35 . If a V.35 connection is desired, then the internal shunt for that channel must be physically moved from its default RS232 position to the V.35 position. Back-to- back cables are supplied with the MultiFRAD to connect the RS232C data devices to the back panel DB25 male channel connectors.

Command Port Connector

The Command Port connector is used to configure the MultiFRAD using a PC with a serial port or terminal emulation. The Command Port connector has a DCE physical interface with a DB25 female connector.

TRUNK (RS232/V.35) Connector

The RS232/V.35 trunk connector is used to connect the MultiFRAD to a Frame Relay Network. The trunk connection is to a synchronous communications device such as a modem, DSU, or ISDN. This connection can be either RS232C or V.35. If the connection is V.35, then the shunt for that link must be moved from the default RS232 position to the V.35 position. This connector is a DB25 male connector.

Power Connector

The Power connector is used to connect the external power supply to the MultiFRAD. The Power connector is a 6-pin circular DIN connector. A separate power cord connects the power supply to a live AC grounded outlet.

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Multi-Tech Systems FR2201 manual Back Panel Description, Ethernet AUI Connector