CISCO-ADSL-CAP-LINE-MIB
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.