4.0 General Operation and Special Features

4.9.4DTE DISPLAYS

When Auto-Display is enabled, an update of the LCD is automatically displayed on the DTE screen each time a command (E, 1, 2, 3, left arrow, or right arrow) is entered to control the front-panel LCD on the connected modem. Auto-Display is enabled when the long-form connect command (CONNECT) is used.

Auto-Display is disabled when the CON command is used. However, even with Auto-Display disabled, the D command can be used to display the LCD screen.

The CONNECT command also enables echo and line feed on the DTE screen, whereas both are disabled when CON is used. Data from the connected modem is easier to read when CONNECT is used; however, data throughput is faster if CON is used.

On the Modem’s front-panel LCD, a selected option flashes so it is easily identified as the current selection. When an LCD display is sent to the DTE in response to the CONNECT command, characters flashing on the LCD are indicated on the DTE screen by asterisks. An asterisk appears below each flashing character. In the example below, the selected CTS to EIA option

is TRUE.

Actual LCD on connected modem:

CTS to EIA

NORM RTS TRUE

DTE display:

CTS to EIA NORM RTS TRUE

****

Asterisks denoting flashing characters are also displayed if the D command is used to request a display of the LCD—provided the connect command last used was CONNECT and not CON. Even when the CON command is used (meaning the LCD of the connected modem is not automatically displayed), a computer reading data from the diagnostic port is able to determine which characters are flashing because bit 7 (MSB) is set in each flashing character.

4.9.5DISCONNECTING FROM A DIAGNOSTIC LINK

There are two ways to disconnect from a modem-DTE diagnostic link:

If you want to connect to another modem, issue the CONNECT command followed by the address of the modem to which you want to connect.

The DTE disconnects from the first modem and immediately connects to the one you specified.

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Black Box MD885AE-R2, MD885C-R2, MD885A-R3, 34336 user manual DTE display

MD885C-R2, MD885A-R3, MD885AE-R2, 34336 specifications

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