ZyXEL Communications MSAP2000 manual Counters. Line Data

MSAP2000 AAMS User’s Guide

The following table describes the fields in this screen.

Table 22 Line Rate Information

LABEL	DESCRIPTION
Line Performance	Click Line Performance to display an ADSL port’s line performance
counters. Line Data	Click Line Data to display an ADSL port’s line bit allocation.
Port	Use this drop-down list box to select a port for which you wish to view information.
Refresh	Click Refresh to display updated information.
Port Name	This field displays the name of the ADSL port.

The rate fields display the transmission rates. “Line Down” indicates that the ADSL port is not connected to a subscriber.

Down/up Stream	These are the rates (in Kbps) at which the port has been sending and
Rate	receiving data.
Down/up Stream	These are the DSL line’s downstream and upstream noise margins.
Noise Margin	Measured in decibels (dB).
Down/up Stream	These are the reductions in amplitude of the downstream and upstream DSL
Attenuation	signals. Measured in decibels (dB).
Down/up Stream	These are the highest theoretically possible transfer rates (in Kbps) at which
Attainable Rate	the port could send and receive data.
Service Mode	This field displays the ADSL standard that the port is using: G.dmt, G.lite
	or ANSI T1.413 issue 2, ADSL2, ADSL2+, ETSI
Trellis Encoding	This field displays whether Trellis encoding is turned on or off. Trellis
	encoding helps to reduce the noise in ADSL transmissions. Trellis may
	reduce throughput but it makes the connection more stable. a
Down Stream	This field displays the number of milliseconds of interleave delay for
Interleave Delay	downstream transmissions.
Up Stream	This field displays the number of milliseconds of interleave delay for
Interleave Delay	upstream transmissions.
Down Stream	This field displays the amount of power that this port is using to transmit to the
Output Power	subscriber’s ADSL modem or router. The total output power of the transceiver
	varies with the length and line quality. The farther away the subscriber’s ADSL
	modem or router is or the more interference there is on the line, the more power
	is needed.
Info	The Info Atur fields show data acquired from the ATUR (ADSL Termination
	Unit – Remote), in this case the subscriber’s ADSL modem or router, during
	negotiation/ provisioning message interchanges. This information can help in
	identifying the subscriber’s ADSL modem or router.
	The Info Atuc fields show data acquired from the ATUC (ADSL Termination
	Unit – Central), in this case AAM, during negotiation/provisioning message
	interchanges. The vendor ID, vendor version number and product serial number
	are obtained from vendor ID fields (see ITU-T G.994.1) or R-MSGS1 (see

a. At the time of writing, the MSAP2000 AAMS always uses Trellis coding.

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