Black Box ME800A-R2, Short-Haul Modem B, ME810 Pinning with DTE/DCE switch in the DCE position

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SHM-B ASYNC

information concerning its DTE/DCE setting. Table 2 gives the EIA-232 pinning of the SHM-B with the DTE/DCE switch in the DCE position.

Table 2. Pinning with DTE/DCE switch in the DCE position.

PIN NUMBER

SIGNAL NAME

DIRECTION

1

Protective Ground

—————

2

Transmitted Data TD*

To DCE

3

Received Data RD*

From DCE

4

Request to Send (RTS)

To DCE

5

Clear to Send (CTS)

From DCE

6

Data Set Ready (DSR)

From DCE

7

Signal Ground

—————

8

Received Line Signal Detector

From DCE

20

Data Terminal Ready (DTR)

To DCE

*Pins 2 and 3 (TD and RD) can be reversed using the DTE/DCE switch, S1 on the circuit board. See Section 3.3 for details.

NOTE

Configure each SHM-B independently. Your local and remote modems won’t necessarily be configured the same.

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Contents
Short-Haul Modem B SHM-B Async SHM-B Async SHM-B Async SHM-B Async Trademarks Used in this Manual Specifications Distance miles/kmOperating Temperature 32 to 112F 0 to 50C SHM-B Async Introduction Installation Four-Wire ConnectionsSHM-B board 5-screw terminal block Wiring diagram for two SHM-B units EIA-232 ConnectionSwitch Settings EIA-232 Pin Connections on SHM-BPinning with DTE/DCE switch in the DCE position Flow Control ON/X-OFF Mode Activating the Loopback switch OperationSHM-B Async Rackmount Installation SHM-B Async Troubleshooting Guide SHM-B Async SHM-B Async SHM-B Async SHM-B Async SHM-B Async Copyright 2000. Black Box Corporation. All rights reserved
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