Multitech MT56DSU-R Owner's Manual download pdf (Page 33)

Chapter 4 - Troubleshooting

4.2.1 RCV Indicator

The RCV (Receive) LED lights when the MT56DSU-R receives data

( 0 or a space) from the network.

This LED should appear to flash during normal data reception.

4.2.2 XMT Indicator

The XMT (Transmit) LED lights to indicate the DTE is sending data

(0 or a space) across the DTE connector.

This LED should appear to flash during normal data transmission.

4.2.3 CD Indicator

The CD (Carrier Detect) LED lights when the MT56DSU-R has

received the data carrier from the network. This indicator will go off

when the MT56DSU-R is receiving the idle code or no signal at all. If

RTS is off on the remote DSU, the remote sends an idle code to the

local DSU.

4.2.4 56K Indicator

The 56K LED lights when the Data Rate selection is set at 56000

bps. This indicator will be off for all other data rates. Refer to

Chapter 2 for switch settings.

4.2.5 19.2 Indicator

The 19.2 LED lights when the Data Rate selection is set at 19200

bps. This indicator will be off for all other data rates. Refer to

Chapter 2 for switch settings.

4.2.6 CTS Indicator

The CTS (Clear to Send) LED lights when the MT56DSU-R

generates a CTS in response to either an RTS signal received at the

DTE connector, or RTS forced on by the corresponding DIP switch.

CTS is always off during a No Signal condition. If the Circuit

Assurance option is enabled, the CTS will be off whenever Carrier

Detect is off.

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Multitech MT56DSU-R Owner's Manual Page 33