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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.
82023101.p65
Chapter 4 - Troubleshooting
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2/12/01, 2:52 PM
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