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Ds3 feac rx, Configuration, Link activity – EXFO FTB-8100 Series Transport Blazer for FTB-500 User Manual

Page 315

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DSn Tabs

SONET/SDH Application

301

DS3 FEAC RX

DS3 FEAC RX

The DS3 FEAC RX tab gives current and previous alarms/status and
loopback commands as well as the link activity for the received DS3 signal.

Note: The DS3 FEAC RX tab is available when the DS3 framing is set to C-Bit

Parity (see page 293).

Press TEST, DSn-PDH, and FEAC (under DSn-PDH RX).

Configuration

Enable FEAC: Enables DS3 FEAC codeword configuration and analysis.

Link Activity

³

No Activity (All 1’s): An all ones pattern (11111111 11111111) has been
detected in the last second.

³

Alarm/Status: An Alarm/Status codeword has been detected in the last
second. An Alarm/Status is only detected when receiving at least 10
consecutive occurrences of a specific codeword.

³

Loopback: A Loopback command message has been detected in the
last second. A valid loopback command is detected only when
receiving 10 consecutive occurrences of a specific Loopback
Command
immediately followed by 10 occurrences of a specific
Channel Codeword.