
303560-A Rev 00
2-671
ft1_state
Displays information about the operational state of the FT1/T1 DSU/CSU adapter module.
The display includes the following information:
Slot Slot identifier; always 1 for the ARN.
Conn Connector identifier; ranges from 1 to 2.
Port State State of the port associated with the FT1/T1 line, as follows:
•
Red Alarm
- A red alarm signal, indicating the loss of T1 framing.
•
Yellow Alarm
- A yellow alarm signal from the T1 network
indicating that the remote T1 interface is out-of-frame.
•
Loopback
- Port is in loopback mode.
•
Up
- Port is synchronized with the T1 network.
•
AIS
- A blue alarm signal from the T1 network indicating a total
loss of signal from the remote T1 device.
Loopback State Defines the loopback state of the port, as follows:
• Line Loopback
- Loops received data back onto the T1
transmission path at the point where the T1 interface enters the
FT1/T1 DSU/CSU adapter module.
• Payload Loopback
- Detects and encodes an ANSI Bit-Oriented
Payload Loopback message or an AT&T Payload Loopback
message across the T1 Facility Data Link (FDL). Upon detection
of a Payload Loopback message, the FT1/T1 DSU/CSU adapter
module transmits the received information in the outgoing
direction.
• No Loop -
No loopback is configured on the FT1/T1 DSU/CSU
adapter module.
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