ZyXEL Communications AAM1212-51, User Manual

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AAM1212-51/53 Series User’s Guide
134 Chapter 15 xDSL Line Data
Rate The rate fields display the transmission rates. “Line Down” indicates that the
ADSL port is not connected to a subscriber.
Down/up Stream
Rate
These are the rates (in Kbps) at which the port has been sending and receiving
data.
Down/up Stream
Noise Margin
These are the DSL line’s downstream and upstream noise margins. Measured in
decibels (dB).
Down/up Stream
Attenuation
These are the reductions in amplitude of the downstream and upstream DSL
signals. Measured in decibels (dB).
Down/up Stream
Attainable Rate
These are the highest theoretically possible transfer rates (in Kbps) at which the
port could send and receive data.
Info
Service Mode This field displays the ADSL standard that the port is using: G.dmt (AAM1212-
51), G.dmt Annex B (AAM1212-53), ETSI (AAM1212-53), G.lite, ANSI T1.413
issue 2 (AAM1212-51), ADSL2, or ADSL2+.
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
Interleave Delay
This field displays the number of milliseconds of interleave delay for downstream
transmissions.
Up Stream
Interleave Delay
This field displays the number of milliseconds of interleave delay for upstream
transmissions.
Down Stream
Output Power
This field displays the amount of power that this port is using to transmit to the
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.
Up Stream
Output Power
This field displays the amount of power that the subscriber’s ADSL modem or
router is using to transmit to this port. 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 Atur
Info Atuc 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 AAM1212, 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 T1.413).
a. At the time of writing, the AAM1212 always uses Trellis coding.
Table 29 xDSL Line Rate Info (continued)
LABEL DESCRIPTION