Interpreting LineStatus Indicators
Error LEDs
| The following error LEDs indicate port error events that | |
| generate communication problems: | |
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LED |
| Meaning |
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BPV |
| BiPolar Violation. For an |
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| pulse of the same polarity as the previous pulse causes a BPV |
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| error event. |
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PCV |
| Path Coding Violation. |
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| • In D4 and |
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| error. |
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| • In ESF and |
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CS |
| Controlled Slip. Results from the replication or deletion of the |
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| payload bits of the DS1 frame. |
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| A Controlled Slip may be performed when there is a timing |
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| difference between a synchronous receiving terminal and the |
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| received signal. |
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Loopback LEDs
The following Loopback LEDs indicate whether the port is in a loopback mode (which can be why it isn't running normally):
LED Meaning
Payload The signal returned toward the source of the loopback command consists of the payload of the received signal (with bit sequence integrity retained), and
Line The signal returned to the loopback command source consists of the full signal. Bit sequence integrity is maintained, framing is not changed, and Bipolar Violations are not removed. (See Error LEDs on page 112 for information about Bipolar violations.)
112 | Interphase Corporation |