View real-time activity of the ISDN, T1, and E1 lines on the PortMaster.
| PortMaster
| IP address or name of the selected PortMaster.
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| Line
| Line number (line0 through line<n>).
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| Status
| State of the line---up or down.
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| Receive Level
| Signal strength on the line in decibels.
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| Blue Alarm
| Number of blue alarms sent from the remote end of the connection. Blue
indicates unframed all ones (1s) signal.
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| Yellow Alarm
| Number of yellow alarms sent from the local end of the connection. Yellow
indicates D4 bit2, D4 12th F-bit, or extended superframe (ESF) mode (framing)
signal.
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| Carrier Loss
| Number of interrupts resulting in loss of the carrier signal.
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| Sync Loss
| Number of interrupts resulting in device loss of synchronization signal.
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| Bipolar Error
| Number of bipolar errors---consecutive bipolar violations of same polarity.
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| CRC
| Number of errors in the CRC6 code words (ESF framing), or in the Ft framing
bit position (D4 framing).
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