3Com S330 manual Viewing Virtual Circuit, Voice Compression Module VC Statistics

200CHAPTER 5: PATHBUILDER S330 DIAGNOSTICS AND PERFORMANCE STATISTICS

BES—The number of bursty errored seconds (BESs) encountered by the VCM

T1-DSX/E1 interface.

DM—The number of degraded minutes (DMs) encountered by the VCM

T1-DSX/E1 interface.

LCV—The number of line coding violations (LCVs) encountered by the VCM

T1-DSX/E1 interface.

Voice Compression Module VC Statistics

Voice compression module VC statistics are frame and byte counts since the last counter reset. On the VCM VC Statistics window, you can reset the counter by entering c. VC statistics are displayed as a list rather than a table. The VCM

T1-DSX and VCM E1 VC Statistics screens display the following statistics: Received Frames—Total number of frames received over the virtual circuit. Transmitted Frames—Total number of frames transmitted over the virtual circuit.

AAL5 Errors—The total number of invalid frames received over the virtual circuit. Invalid frames are frames that are received with good FCS but that cannot be processed due to wrong content.

Discarded Congested Frames—The total number of frames received over the virtual circuit that were discarded due to congestion. Congested frames are frames that were not transmitted due to link congestion.

Voice Compression Module Port Activity Statistics

The VCM Port Activity Statistics screen displays the following statistics for each channel.

ch—Channel number.

tx packets—Number of transmitted packets. rx packets—Number of received packets. tx bytes—Number of transmitted bytes.

rx bytes—Number of received bytes.

Viewing Virtual Circuit	The PathBuilder S330/S310 provides you with circuit parameters and cell counts
Statistics	broken down in various ways:
	■	by circuit
	■	by port/group
	■	by shaper
	■	by buffer (queue)

These statistics enable you to look at the cell loss at various points in the data flow and adjust parameters—such as shaper values—accordingly.