Philips CPWBS154 - Manual (Page 29)

The following items are included on the ADSL status page:
Parameter Description
Status
• Line Status
Shows the current status of the ADSL line connection.
• Link Type Two types of link: Fast path and Interleaved path.
Data Rate
• Upstream
Maximum upstream data rate.
• Downstream Maximum downstream data rate.
Operation Data/
Defect Indication
• Noise Margin
Maximum upstream and downstream noise margin.
• Attenuation Maximum reduction in the strength of the upstream and downstream signal.
• Fast Path FEC
Correction There are two latency paths that may be used: fast and interleaved. For
either path, a forward error correction (FEC) scheme is employed to ensure
higher data integrity. For maximum noise immunity, an interleaver may be
used to supplement FEC.
• Interleaved Path FEC An interleaver is basically a buffer used to introduce a delay, allowing for
Correction additional error correction techniques to handle noise. Interleaving slows
the data flow and may not be optimal for real-time signals such as video
transmission.
Fast Path CRC Error The number of Fast Path Cyclic Redundancy Check errors.
Interleaved Path CRC
Error
The number of Interleaved Path Cyclic Redundancy Check errors.
Loss of Signal Defect Momentary signal discontinuities.
Fast Path HEC Error Fast Path Header Error Concealment errors.
Interleaved Path HEC
Error
Interleaved Path Header Error Concealment errors.
Statistics (Superframes represent the highest level of data presentation. Each
superframe contains regular ADSL frames, one of which is used to provide
superframe synchronization, identifying the start of a superframe. Some of
the remaining frames are also used for special functions.)
• Received cells Number of cells received.
• Transmitted cells Number of cells transmitted.
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