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MultiFRAD 100-Series User Guide
Front Panel Description
The front panel contains three sets of LEDs that provide the status of the data, DSU, and trunk
connections. The data LEDs display the activity of the data port, whether or not V.35 interface
signaling is used and whether or not command mode is active. The DSU LEDs display status
whether DSU is transmitting or receiving frames, when in DSU mode, when no signal is received
from the network, an outage condition occurs, or when a carrier signal is received from the network.
The trunk LEDs display status whether the trunk is transmitting or receiving frames, link status,
congestion, and if the trunk port is set to use V.35 signaling.
35
Lights when the data port is configured for a V.35 interface. That is, the data shunt is in the
V.35 position.
CM
Lights when the Data/Command mode switch is in the Command mode position.
TD
Blinks when data is being transmitted - on for a space and off for a mark.
RD
Blinks when data is being received - on for a space and off for a mark.
Note: These lights are valid only when the unit is in DSU mode.
TD
Blinks when data is being transmitted - on for a space and off for a mark.
RD
Blinks when data is being received - on for a space and off for a mark.
DSU The Data Service Unit (DSU) LED lights when the unit is in DSU-only mode.
NS
The No Signal (NS) LED lights when no signal is received from the network or when the signal
is too weak for normal operation.
OOS The Out-of-Service (OOS) LED lights when an outage condition occurs. This happens when
there is a failure in the digital service that is detected by the network and the Telco sends a
repetitive OOS sequence.
CD
The carrier detect (CD) LED lights when a carrier signal is received from the network.
CN
Lights when congestion is detected on the trunk.
LK
Blinks slowly when there is no link management connection with the network. Blinks quickly
when link management is established with the network. Remains solid ON when the network
indicates the PVC is active.
CD
Lights when a carrier signal is detected.
TD
Blinks when data is being transmitted - on for a space and off for a mark.
RD
Blinks when data is being received - on for a space and off for a mark.
8
Figure 1-2. Front Panel
Data
DSU
Trunk
FR111A
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