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7. Operation and Maintenance
9128-A2-GB20-80 September 2002
7-11
Control Lead Descriptions
See Table 7-2, Network, DSX, or PRI Interface LEDs, for descriptions of these
leads. See Table 7-3, User Data Port LED (CSU/DSUs Only), to interpret the user
data port OK control lead. The LED descriptions and control lead descriptions are
the same.
In addition to these LEDs, additional control leads can be monitored through the
Display LEDs and Control Leads screen. These indicators show the current state
of each control lead and what they indicate when they are highlighted; that is, in
the On state. They are described in Table 7-5, Additional Control Leads.
Table 7-5. Additional Control Leads
Label Indication What It Means
Network Interface
LMI OK LMI Operational Status LMI is operating successfully on the first frame
relay link on the network interface.
User Data Port
TXD Transmit Data Data is being sent to the far-end device.
RXD Receive Data Data is being received from the far-end device.
DTR Data Terminal Ready Shows the current state of the DTR control lead.
This indicator should always be on.
RTS Request to Send Shows the current state of the RTS control lead.
This indicator should always be on.