This MIB module serves as an enterprise-specific extension of
the ADSL-LINE-MIB. The structure of this MIB module shadows
the structure of the ADSL-LINE-MIB, table for table. The tables
defined by this MIB module contain managed objects that meet the
following criteria:
1) A managed object represents an attribute or characteristic
specific to CAP (Carrierless AM/PM) modems.
2) The ADSL-CAP-LINE-MIB does not already contain a managed
object representing the same information as this managed
object.
Observe that entries contained by the tables in this MIB module
do not augment the corresponding entries in the ADSL-LINE-MIB,
as every modem represented by the ADSL-LINE-MIB is not
necessarily a CAP modem.
Also observe that entries contained by the tables in this MIB
module do not augment the corresponding entries in the
ADSL-CAP-LINE-MIB, as this assumes that the ADSL-CAP-LINE-MIB
defines tables that correspond to every table defined by the
ADSL-LINE-MIB. At this time, this assumption does not hold
true.
*** ABBREVIATIONS, ACRONYMS, AND SYMBOLS ***
ADSL - Asymmetric Digital Subscriber Line.
ATM - Asynchronous Transfer Mode.
ATU-C - ADSL Transceiver Unit, Central Office end.
ATU-R - ADSL Transceiver Unit, Remote terminal end.
BER - Bit Error Ratio.
CAP - Carrierless Amplitude Modulation / Pulse Modulation.
DSL - Digital Subscriber Line.
SNR - Signal-to-Noise Ratio.
STM - Synchronous Transfer Mode.
*** DEFINITIONS ***
DOWNSTREAM
The flow of data in the direction from the ATU-C to ATU-R.
MARGIN (also referred to as 'SNR margin')
The difference between the SNR of the received signal and
the SNR required to provide a BER of 10E-7.
SYMBOL
The number of bits the transmitter is capable of
multiplexing and modulating in a single signalling interval.
SYMBOL RATE
The rate at which all symbols are transmitted.
UPSTREAM
The flow of data in the direction from the ATU-R to ATU-C. |