Paradyne 7123 User Manual page 82

5. Operation and Maintenance
Health and Status Messages
The following table provides Health and Status messages that apply to the
7123 DSU/CSU.
Table 5-6.
5-12
Health and Status Messages (1 of 2)
Message
AIS at Network 1
CTS down to Port-1 Device
DTR Down from Port-1 Device
EER at Network 1
Ethernet Link Down
LOS at Network 1
Network Com Link Down
OOF at Network 1
September 2001
What It Indicates
An Alarm Indication Signal (AIS) is received by the
network interface. AIS is an unframed, all ones
signal. Possible reasons include:
T
Upstream DSU/CSU is transmitting AIS
(keep-alive signal).
T
The network is transmitting an AIS.
The user data port CTS control lead on the
DSU/CSU is off.
The DTR control lead from the device connected to
the user data port is deasserted.
The error rate of the received network signal
exceeds the currently configured threshold. This
condition only occurs if the network interface is
configured for ESF framing.
This condition clears when the error rate falls below
the threshold value, which may take up to
15 minutes.
The Ethernet port is enabled, but communication
between the management system and the unit is
not currently possible on the port.
A Loss of Signal (LOS) condition is detected on the
network interface. Clears when the ratio of ones to
zeros received is greater than or equal to 12.5%.
Possible reasons include:
T
Network cable problem.
T
No signal is being transmitted at the far-end
DSU/CSU.
T
T1 facility problem.
The communication link for the COM port is down,
and the COM port is configured for Net Link.
An Out of Frame (OOF) condition is detected on the
network interface. Possible reasons include:
T
Incompatible framing format between the
network and the DSU/CSU.
T
Network cabling problem.
T
T1 facility problem.
7123-A2-GB20-00