md-20 mini dslam - ctc u · pdf filemandatory regulations united states this section describes...

System Description

MD-20 Mini DSLAM Digital Subscriber Line Access Multiplexer

Mandatory Regulations


The following sections describe the mandatory regulations that govern the installation and operation of the Mini DSLAM.

List of Terms

Table 1 lists the terms used in this chapter.

Table 1 List of Terms

Term Expansion

CE Conformité Européenne EEC European Economic Community FCC Federal Communications Commission

General Requirements

The sections that follow outline the mandatory regulations that govern the installation and operation of the Mini DSLAM. You must adhere to these instructions so that your system meets regulatory requirements.

Danger 1 – When removing cards from a shelf under power, some of the components such as the DC converters may be extremely hot. Handle by the card guides only.

Warning1 – This unit contains no user-serviceable parts. Refer servicing to qualified personnel. Warning 2 – To prevent accidental electrical short circuits, align the card correctly between the card guides before you insert it in the slot.

Prevention of Access

The Mini DSLAM must be accessible only to authorized personnel. Install this apparatus in a restricted access location or similar environment to prevent unauthorized access.

EMC Compliance

EMC compliance may require the use of ferrites, shielded cables or other special accessories. Where required, these special accessories must be installed as per the instructions.

I


United States

This section describes the mandatory regulations that govern the installation and operation of the Mini DSLAM in the United States.

Federal Communications Commission

This equipment has been tested and found to comply with the FCC requirements for emission of electromagnetic energy for Class A (part 15 subpart B).

European Regulations

EU Compliance Statement

This product complies with the requirements set out in the Council Directive on the Approximation of the laws of the Member States relating to Electromagnetic Compatibility Directive (89/336/EEC).

This product also complies with the Low Voltage Directive 73/23/EEC in order to comply with the requirements in the Council Directive 73/23/EEC relating to electrical equipment designed for use within certain voltage limits and the Amendment Directive 93/68/EEC.

General

This equipment must be permanently grounded.

Safety Approval

The system meets the Product Safety Requirements identified in EN60950: 2003.

II

Contents

Contents


List of Figures ............................................................................................................................ IV

List of Tables ............................................................................................................................... V

Preface ..........................................................................................................................................1

Scope ........................................................................................................................................ 1 Audience........................................................................................................................................ 1 Related Documentation................................................................................................................. 1 Documentation Conventions ......................................................................................................... 1

1 — System Description .........................................................................................................3

1.1 General Overview ......................................................................................................................... 4

1.1.1 Features ........................................................................................................................... 5 1.1.2 System Application........................................................................................................... 6

1.2 Hardware Architecture .................................................................................................................. 7

1.3 Technical Summary of the ............................................................................................................ 9

1.3.1 Physical Specifications..................................................................................................... 9 1.3.2 Environmental Specifications ........................................................................................... 9 1.3.3 Power Specifications ...................................................................................................... 10

1.4 Detailed Description .................................................................................................................... 11

1.4.1 Trunk Card ..................................................................................................................... 11 1.4.2 Line Card........................................................................................................................ 15 1.4.3 DC Power Card .............................................................................................................. 18 1.4.4 Cooling System .............................................................................................................. 19

2 — Software Introduction....................................................................................................21

2.1 General Overview......................................................................................................................... 22

2.1.1 Features of Management Interface ................................................................................ 23

2.2 Configuration Management .......................................................................................................... 24

2.3 Performance management........................................................................................................... 26

2.4 Fault Management........................................................................................................................ 29

Abbreviations

III

List of Figures

List of Figures

Figure 1-1 System application with GE1AC trunk card ............................................................................. 6

Figure 1-2 GE1AC Module Functional Block Diagram ........................................................................... 12

Figure 1-3 AL5EC/AL5BC/AL5AC Module Functional Block Diagram ................................................ 15

Figure 2-1 Management Software Model.................................................................................................. 22

IV

List of Tables

Table 1-1 GE1AC Card Controls and Indicators....................................................................................... 14

Table 1-2 AL5EC/AL5BC/AL5AC Card Controls and Indicators............................................................ 17

Table 1-3 DC Power Card Controls and Indicators ................................................................................... 18

Table 1-4 FAN Card Controls and Indicators ............................................................................................ 19

V

List of Tables

VI

Preface

Scope

This document provides an overview on the Mini DSLAM. It contains:

Descriptive material about the DSLAM and its units (chapter 1)

Descriptive material about the software of the DSLAM (chapter 2)

Expansions of abbreviations used in the manual (Abbreviations)

Audience

The guide is intended for system engineers or operating personnel who want to have a basic understanding of the Mini DSLAM.

Related Documentation

For information about installing, operating and maintaining, and troubleshooting the DSLAM, refer to the Mini DSLAM R3.1 HW Installation and User Guide. For information about how to manage the DSLAM through Command Line Interface (CLI), refer to the Mini DSLAM R3.1 CLI Command Reference Guide. For information about how to manage the DSLAM through Web GUI, refer to the Mini DSLAM R3.1 Web Configuration Tool Guide.

Documentation Conventions

The following conventions are used in this manual to emphasize information that will be of interest to the reader.

Caution — The described activity or situation might or will cause service interruption.

Note — The information supplements the text or highlights important points.

1 / 34

2 / 32

1 — System Description

1.1 General Overview

1.2 Hardware Architecture

1.3 Technical Summary

1.4 Detailed Description

3 / 34

1— System Description


The Mini DSLAM R3.1 is a 2U high box-type DSLAM with a rack-mountable enclosure. There is also an optional 2U high system. The 2U system provides 4 slots for one trunk card and 3 line cards.

The Mini DSLAM R3.1 provides Gigabit Ethernet (GbE) for trunk interface and 24 ports ADSL for each line card. It is also suitable for small size application and can be easily deployed in remote location, for instance, remote terminal, business parks, street cabinets, etc… to extend the service reach distance.

The Mini DSLAM can act as a Subtending-DSLAM or as a stand-alone DSLAM.

The system includes:

Trunk Card: GE1AC

It provides the trunk interface, and it is also the system control module to provide the DSLAM system OAM&P function.

Line Card: AL5EC, AL5BC, AL5AC AL5EC: 24 ports ADSL line card with on-board ETSI option A POTS splitter

AL5BC: 24 ports ADSL line card with on-board ETSI 2B1Q and 4B3T ISDN splitter

AL5AC: 24 ports ADSL line card with on-board ANSI 600Ohm POTS splitter

A DC power card

A cooling system: including a fan card and an air filter

4 / 32


1.1.1 Features

The Mini DSLAM R3.1 provides the following features:

Compact size, low cost, easy installation with upgrading system facility and software

Standard-based with remote configuration, suitable for any location

Support rich Ethernet and application protocols

Provide ADSL, ADSL2/2+ services

Provide advanced QoS

Support ingress VCL policing for all supported ATM service categories

User-Friendly CLI, web-based management interface

Support system software download via FTP for both local and remote terminals

Support database export and import functionality via TFTP for configuration backup and restoration

Support Simple Network Time Protocol (SNTP) to automatically calibrate the time and date of the system

Support system temperature monitoring and automatically controlling fan operation according to system temperature

Support system overheating automatic shutdown

Meet CE requirement

5 / 34


1.1.2 System Application

IP DSLAM with GE1AC trunk card

Figure 1-1 Mini DSLAM system application with GE1AC trunk card

The Mini DSLAM R3.1 supports up to 3 ADSL line cards per 2U box. Each ADSL line card provides 24 lines, enabling the DSLAM to support a total of 72 ADSL lines per 2U box.

User can manage the system with CLI/SNMP/Web GUI via in-band/out-band management channel.

6 / 32


1.2 Hardware Architecture This section describes the shelf, card types, blanking plate, power system, and cooling system that make up the Mini DSLAM. Described locations are based on the DSLAM mounted horizontally, with the side that has the card slots facing forward.

The DSLAM has the following types of cards:

One trunk card (slot 0)

Up to three line cards which support ADSL and POTS subscriber service (slot 1 to 3)

Shelf

The shelf provides factory-installed mounting flanges for installing the DSLAM in racks and outside cabinets or onto wall-mounting brackets.

The shelf has slots for installation of one trunk card and up to a combined total of five line cards for 2U

high shelf.

Trunk Card

The Mini DSLAM R3.1 supports one type of trunk cards: the GE1AC.

The GE1AC provides the control function and the mapping between Ethernet and ATM for the Mini DSLAM system. The system uses only one GE1AC. The card is field-installable and field-replaceable. Replacing the trunk card only affects DSL service for the subscribers.

The GE1AC has six connectors; two connectors are for the Ethernet electrical uplink, two connectors are for the fiber optics uplink, one connector is for local craft port, and one connector is for the Ethernet management interface.

The GE1AC has LEDs to indicate the status of the system, the status of the alarm, and the status of the Ethernet uplinks.

Line Cards

The Mini DSLAM R3.1 supports one type of line card: the ADSL card.

The ADSL card provides ADSL modem and POTS/ISDN splitter functions for the DSLAM. It also passes ADSL traffic in the form of ATM cells to and from the trunk card through the backplane.

The DSLAM can support up to three ADSL cards for 2U system. Each ADSL card can support up to 24 subscribers. The card is field-installable and field-replaceable.

7 / 34


The ADSL card has two connectors; one is for sending and receiving POTS/ISDN traffic to and from the PSTN, the other is for sending and receiving ADSL subscriber traffic to and from the subscribers.

The ADSL card has LEDs to indicate the status of the card and the status of the ADSL port.

There are three variants of the ADSL card:

AL5EC: Annex-A line card with on board ETSI option A POTS splitter

AL5BC: Annex-B line card with on board ETSI 2B1Q and 4B3T ISDN splitter

AL5AC: Annex-A line card with on board ANSI 600Ohm splitter

Blanking Plate

A blanking plate has no circuitry, LEDs, or connectors. It is used in any unfilled slot to maintain system EMI containment and system cooling integrity.

Backplane

The backplane is a printed circuit board that provides connectivity between the cards, cooling system, and the power system. It is factory-installed towards the back of the shelf.

Power System

The 48V dual DC inputs are provided through the DC power card. The terminal block on the DC power card receives – 48 vdc input power and carries it to the backplane. Each line card and trunk card has individual power module. The power module is supplied with – 48 vdc input power by the backplane.

Cooling System

The cooling system of the Mini DSLAM consists of a fan card and an air filter.

The fan card has two axial fans to blow air through the DSLAM for cooling. The fan card is field- installable and field-replaceable.

The air filter is for trapping air-bourn particulates. The filter is field-installable and filed-replaceable. The air filter can be replaced without removing the fan card.

The cooling system has one bi-color LED on the fan card to indicate the status of the fan card.

There are two variants of the fan card:

FA1AC: Fan card for 2U Chassis

There are also two variants of the air filter: for 2U Chassis.

8 / 32


1.3 Technical Summary

1.3.1 Physical Specifications

Item Value

Width 482.6 mm (19 in.)

Height 88.9 mm (2U)

Depth 256 mm (10 in.)

Weight 4.4 Kg with no units installed (2U)

Each unit weight:

- GE1AC card: 0.5 Kg

- AL5EC/AL5BC/AL5AC card: 1.4 Kg

- FA1AC card: 0.25 Kg

- DC power card: 0.16 Kg

- air filter (including the blanking plate): 0.1 Kg

Rack Standard rack (19” or 23”)

1.3.2 Environmental Specifications

Item Value

Operating Temperature -40 ~ 65°C

Relative Humidity 5% to 95% (non-condensing) at 35°C

9 / 34


1.3.3 Power Specifications

Item Value

Power Supply Interface Dual A+B feeds, -72V ~ -36V DC, nominal – 48V

Power Requirement 3.25A@48V, no greater than 150 W for a single 2U shelf at full capacity operation

Power Consumption:

GE1AC

AL5EC, AL5BC, AL5AC

FAN

Chassis (DC card + backplane)

19 W (max)

30 W (max)

12.7 W (max)

5 W (max)

10 / 32


1.4 Detailed Description

1.4.1 Trunk Card

The Mini DSLAM R3.1 uses Gigabit Ethernet interface for an uplink to the Ethernet Metropolitan Area Network (E-MAN). The GE1AC card transmits ADSL traffic between the subscriber equipment (router, bridge/modem or network interface card) and the E-MAN.

The GE1AC card provides a user-networking interface with Ethernet packets and ATM cells mapping. This card provides a high bandwidth to assemble the Ethernet traffic as well as the ADSL service.

The GE1AC card is not only the system trunk module to provide trunk interface, but also the system control module to provide system OAM&P function.

Features

Provide combo trunk interface with both electrical (RJ-45) and fiber optical (SFP) ports

Support 48V power output over its Ethernet port (Power over Ethernet, PoE) for its GE electrical interfaces per IEEE 802.3af

Support SW remote download

Provide an internal battery to sustain the system configuration, alarm history, and event log for a minimum of three days

Provide one craft interface with RJ45 jack on the front panel

Provide one Ethernet interface with RJ45 jack on the front panel for out-band management

Support IPv4 packet

Provide AAL5 traffic conversion between ATM and Ethernet per RFC 2684

Support IEEE802.1d Ethernet bridge function between trunk Ethernet ports

Support Rapid Spanning Tree Protocol (RSTP) for the trunk interfaces per IEEE 802.1w

Support automatic source MAC learning and block duplicate ones (the system is able to maintain 4K entries in its own MAC address table with maximum supported number 128 per port)

Support IEEE 802.1q Port-base VLAN and Tag-base VLAN

Support static VLAN management

Support Link Aggregation in IEEE 802.3ad that allows 2 GBE links to be aggregated together as a logical link. Support both LACP protocol (dynamic) and no LACP protocol (static)

Support IP multicast forwarding

Support VLAN aware IGMP snooping v1 and v2 per RFC 1112 and RFC 2236

11 / 34


Support DHCP Option 82 (RFC 3046 – DHCP Relay Agent Information Option) and PPPoE Relay

Support Simple Network Time Protocol (SNTP) version 4 for IPv4

Support Layer-2 frame filtering based on source MAC addresses/ VLAN IDs/ port numbers

Support Layer-3 filtering based on IP source/destination address, protocol ID, and TCP/UDP port number

Support VLAN level QoS function per IEEE 802.1p and support 4 priority queues for QoS

Module Functional Block Diagram

NetworkProcessor

To ShelfBackplane

PowerModule

BUSDriver

GTLP EthernetPHY

EthernetPHY

Uplink Interface

Uplink Interface

PowerConnector

Figure 1-3 GE1AC Module Functional Block Diagram

After the line cards aggregate 24 ports DSL traffic into the network processor of GE1AC card through high-speed serial GTL bus, the network processor terminates the ATM traffic into Ethernet packets through its SAR (Segmentation and Reassembly) function. The network processor also provides the Layer-2 Ethernet functions; it can map the ATM VCI to VLAN ID (802.1q) and priority queues (802.1p).

Through the two GbE uplink interfaces, the system can provide Link Aggregation (802.3ad), VLAN stacking, and Rapid Spanning Tree (802.1w) as a ring protection architecture.

12 / 32


Card Specifications

Description Specification

Main Board Dimensions 258.2 mm × 235 mm × 20 mm (width × depth × height)

(This include the faceplate and PCB)

Trunk Interface Two IEEE 802.3 10/100/1000 Base-T auto-sensing GbE trunk ports. And the selection of speed for each port is independent.

Support auto-adaptive between full-duplex and half-duplex operation modes for 10 and 100 Mbps operation speed on a per trunk port basis. The system only supports full-duplex mode for 1000 Mbps.

Support both RJ45 and optical SFP (Mini-GBIC) connectors for each trunk port.

For the optical trunk port: support 1000 Base-TX/SX/LX/EX/ ZX fiber interfaces (defined in IEEE 802.3ab) simultaneously.

Support 48V power output over the Ethernet port (Power over Ethernet, PoE; this function needs to be set via jumpers on the PCB. Also, to support PoE function, the system input power must be between -46 ~ -59 Vdc.) for the GbE electrical interfaces per IEEE 802.3af.

Capacity Supports up to 5 service cards.

Management Interface In-band management: provide all system OAM&P functions: software updates, and management system interaction through Ethernet trunk port.

Out-band management: provide two kinds of management interfaces. One is the RS-232 local craft interface for basic provisioning. Interface default configuration: 9600 baud rate, 8-bit data, none parity, and 1 stop bit. The other is a 100 Base-T auto-sensing Ethernet Interface.

OAM&P Configuration Management

Performance Management

Fault Management

Status Monitoring.

Provides NV-RAM to backup system configuration data, and data base export/import mechanism.

Backplane connector Signal connector: 96 pins female connector

Power connector: 24 pins female connector

Control Button HW Reset hidden button.

HW ACO button.

LED 4 LEDs on the front panel or RJ45 to indicate system, alarm and Ethernet link status

13 / 34


Controls and Indicators

Table 1-1 GE1AC Card Controls and Indicators

Front View of GE1AC Card

LED Description

SYS To indicate the system operation status

ALM To indicate the system alarm status

GBE1 To indicate the optical trunk port status

GBE2 To indicate the optical trunk port status

GBE1- Speed GBE2- Speed

(LED on RJ-45)

To indicate the electrical trunk port transmission speed

(orange color LED on the Ethernet port)

GBE1- Link/Act GBE2-Link/Act

(LED on RJ-45)

To indicate the electrical trunk port link status

(green color LED on the Ethernet port)

MGMT- Speed

(LED on RJ-45)

To indicate the transmission speed of the Ethernet management port

(green color LED on the Ethernet port)

MGMT- Link/Act

(LED on RJ-45)

To indicate the link status of the Ethernet management port

(orange color LED on the Ethernet port)

Interface Description

GBE1 Gigabit Ethernet trunk port 1

GBE2 Gigabit Ethernet trunk port 2

MGMT Ethernet Port connected to LAN for providing system out-band EMS/Telnet control interface, such as system monitor, control or software upgrade.

COM RS-232 port connected to the terminal for monitoring and controlling the trunk card.

Button Description

ACO Alarm Cut Off

RST A hidden reset button for hardware resetting.

14 / 32


1.4.2 Line Card

Features

Provide 24 ADSL ports compliant with ANSI T1.413, ITU-T G.992.1 Annex A&B, ITU-T G.992.3 Annex A&B&L (ADSL 2, READSL2), and ITU-T G.992.5 Annex A&B (ADSL 2+)

AL5EC: on-board POTS splitter module compliant with ETSI option A

AL5BC: on-board ISDN splitter module compliant with ETSI Annex B (2B1Q/ 4B3T)

AL5AC: on-board ANSI 600 Ohm POTS splitter

Provide hot swappable feature

Support fast and interleave (SW) configurable modes

Support auto-recovery after each ADSL loop failure

Support rate-adaptation in default

Support power back-off when the SNR margin exceeds the configured maximum SNR margin

Module Functional Block Diagram

DSP

AFELineDriver

Splitter

PowerBlock

Host Bus

Data Bus

Power

ToSubscriber

Loop

ToPSTN

ToBackplane

TALT

Figure 1-4 AL5EC/AL5BC/AL5AC Module Functional Block Diagram

15 / 34


Card Specifications

Description Specification

Dimensions 358.4 mm × 235 mm × 20 mm (width × depth × height)

(This include the faceplate and PCB)

ADSL Module ADSL signal modulation and demodulation.

Standard Compliant: ANSI T1.413, ITU-T G.992.1 (G.DMT) Annex A&B, G.992.2 (G.Lite), G.992.3 (ADSL2) Annex A&B&L, G.992.5 (ADSL2+) Annex A&B

Handshake procedure of each DMT ATU-C ADSLx circuit complies with ITU-T G.994.1.

Physical layer management of each DMT ATU-C ADSLx circuit complies with ITU-T G.997.1.

DMT ADSL supports either the Fast Channel or the Interleaved Channel.

Capacity 24 Ports/Card

Splitter Module 24 ports splitter module compliant with ETSI TS 101 952-1-1 option A for European, ETSI TS 101 952-1-3 for Annex B European ISDN, or ANSI 600

System Control Provides all system OAM&P information requested by the trunk card.

Front Access Interface ADSL signal connector (50-pin male connector)

VF connector (50-pin male connector)

Backplane connector Signal connector: two 96 pins female Feature Bus+ connector

Power connector: 24 pins female Feature Bus+ connector

Control Button Service On/Off button

LED 2 tri-color (green, red, yellow) LED indicators for the Service and ADSL port status.

16 / 32



Table 1-2 AL5EC/AL5BC/AL5AC Card Controls and Indicators

Front View of AL5EC

Front View of AL5BC

Front View of AL5AC

LED Description

UNIT To indicate the ADSL card operation status

LINK To indicate ADSL line link status


POTS VF connector. (50-pin dual row header)

LINE ADSL signal connector. (50-pin dual row header)

Button Description

Service ON/OFF

To set the service status On/Off

17 / 34


1.4.3 DC Power Card

Features

Dual DC 48V input terminals with protection, isolation and soft start function

Provide a SWITCH to turn ON/OFF the - 48V DC power

LED Indicates whether or not the - 48V DC power of the system is working

RJ45 provides 1 alarm contact outputs and 4 housekeeping alarm inputs

Dimensions

The dimensions of the DC Power card are (including the faceplate and PCB):

width: 99.6 mm depth: 235 mm height: 20 mm


Table 1-3 DC Power Card Controls and Indicators

Front View of DC Power Card

LED Description

ACT To Indicates the system is power ON/OFF.

Switch Description

Power Switch To turn ON/OFF the dual A+B 48V DC power.


HK & ALM (RJ45 jack) System housekeeping and alarm contact output terminal.

DC 48V IN Dual A+B 48V DC Power input terminal.

18 / 32


1.4.4 Cooling System

The cooling system includes a fan card (FA1AC or FA2AC) and an air filter for trapping air-bourn particulates.

Features

FA1AC: built-in 2 DC fans with error indicating signal to trunk card for monitoring the status of fan module

The fan will be turned on when system temperature is higher than T°C; it will be turned off when system temperature is less than T-10°C (the temperature threshold T can be configured).

Support hot swapping mechanism

Dimensions

Card Name Width Depth Height

FA1AC (2U) 43.0 mm 235 mm 88.9 mm


Table 1-4 FAN Card Controls and Indicators

Front View LED Description

ACT To indicate the FAN card status.

Control Description

ESD Grounding Socket

After the shelf being rack-mounted, for protecting the system from electrostatic discharges damage.

(For Anti-static wrist strap usage)

19 / 34


20 / 32

2 — Software Introduction


2.2 Configuration Management

2.3 Performance Management

2.4 Fault Management

21 / 34


2.1 General Overview The software architecture of the Mini DSLAM is shown in the figure below. It can be divided into three layers: the management layer, the OAM&P layer, and the firmware layer.

Figure 2-1 Management Software Model

As in the figure, CLI shell, SNMP agent, and WEB server are in the top-most layer (management layer) of the system software and offering OAM&P function of the DSLAM based on the conceptual management features as follows:

Configuration Management

Performance Management

Fault Management

The Mini DSLAM uses NVRAM as the database (DB) to store system configuration parameters, alarms and events. The firmware layer includes line card control drivers, Memory and I/O control, etc.

22 / 34


2.1.1 Features of Management Interface

Support CLI, SNMP (v1, v2c), and web-based GUI management interface through both in-band and out-band channels

Support 5 users accessing simultaneously for each management interface

The in-band management connection of GE1AC card is the highest priority of all supported in-band traffic categories

Support out-band management via:

- UART at full duplex line rate of 9600 bps (Craft port)

- 100 base-T Ethernet

Support Telnet interface for remote operators to login system operating console

The IP address and subnet mask of the system for management are provision-able with a default of 192.168.1.1 and 255.255.255.0.

23 / 34


2.2 Configuration Management The configuration management contains the following aspects:

1. System Setup: Interface setup, User Administration, SNTP setup.

2. Bridge Setup

3. ATM traffic management

4. ADSL Profile

5. System inventory and configuration information query

The configuration management provides detecting and reporting to the operators through SNMP Trap for all memory updates reflecting changes in the system configuration. It also provides logging the changes in the operational state and making this information available (on-demand) to the operators over the operation interface.

The system contains a database (DB) to store all the provisioning data so that the configuration can be restored in re-booting. Authorized operators can query the DB to obtain configuration data.

Bridge Setup

The bridge setup of the Mini DSLAM includes the following aspects:

Basic Interface setup

VLAN configuration: static VLAN, priority remark, broadcast/multicast rate limit, VLAN Cross connection

Spanning Tree Protocol

Filtering: filtering rule, ACL

Forwarding: forwarding database

PPPoE and DHCP Relay

IGMP configuration

24 / 34


ADSL Module Configuration

Configuration for a user port at ADSL module is provisioned by the parameter set, which is a group of attributes that determine the user port behaviors; and we call it as profile.

The system provides users up to 72 profiles for each type (see below). One of the profiles is a fix default that cannot be modified; users are allowed to create, delete, and edit the other 71 profiles. The profiles include the following types:

ADSLx Line Spectrum Profile

Including the common transmission parameters, carrier mask parameters, HAM and AM band parameters, and ADSL2/READSL2/ADSL2+ parameters.

ADSLx Service Profile

Including the bearer service parameters.

The ADSL configuration also includes the function for user to query the line status, the physical layer status, and the channel interface status for ATU-C and ATU-R.

25 / 34


2.3 Performance management Performance management supports performance monitoring by collecting and thresholding performance parameter counters against 15-miniute intervals for each interface and module respectively.

Performance statistics include the following:

1. Statistics for current interval: A real-time aspect contains the reflection of the current value situation before the new interval. The current value includes values of current 15-min interval and current 1-day interval.

2. Statistics history at 15-minute basis: The system stores previous 96 statistics of PM parameters at 15-min interval for retrieving.

3. Statistics history at 1-day basis: The system stores previous 7 statistics of PM parameters at 1-day interval for retrieving.

Most of the performance parameter thresholds are user-programmable. The Mini DSLAM uses a threshold crossing alert (TCA) to notify the management system when one of the counts during a measurement interval exceeds its threshold.

The TCA contains the following information:

– Specific interface involved – Error condition identifying the measurement type – Occurrence date and time of the event

ADSL PM

The IP DSLAM provides the following ADSL PM:

Item Description

ATUC_LOSS Loss of signal second

ATUC_LOFS loss of frame Seconds

ATUC_LOMS loss of margin Seconds

ATUC_LPRS loss of power Seconds

ATUC_ESE Excessive Severe Errors Seconds

ATUC_ES Errored Seconds

26 / 34


ATUC_SES Severely Errored Seconds

ATUC_UAS Unavailable Seconds

ATUC_ReInitCounter The number of times the modem left showtime and tried to re-initialize the line because of detection of a persistent defect

ATUC_FailedInitCounter The number of times the modem tries to initialize the line but fails.

ATUC_CellCount The number of upstream ATM cell received with a correct HEC.

ATUC_HEC The number of upstream ATM HEC violations.

ATUC_CVS The counter associated with the number of Coding Violations encountered by the channel.

ATUC_FECCS The counter associated with the number of corrected codewords encountered by the channel.

ATUR_LOSS Far End Loss of signal second

ATUR_LOFS Far End loss of frame Seconds

ATUR_LOMS Far End loss of margin Seconds

ATUR_LPRS Far End loss of power Seconds

ATUR_ESE Far End Excessive Severe Errors Seconds

ATUR_ES Far End Errored Seconds

ATUR_SES Far End Severely Errored Seconds

ATUR_UAS Far End Unavailable Seconds

ATUR_CellCount The number of downstream ATM cell received with a correct HEC.

ATUR_CVS The far end counter associated with the number of Coding Violations encountered by the channel.

ATUR_FECCS The far end counter associated with the number of corrected code words encountered by the channel.

27 / 34


The Performance Manager (PMgr) of the system shall provide the following PM threshold.

NE threshold FE threshold

15min ES threshold 15min ES threshold

15min SES threshold 15min SES threshold

15min UAS threshold 15min UAS threshold

24hour ES threshold 24hour ES threshold

24hour SES threshold 24hour SES threshold

24hour UAS threshold 24hour UAS threshold

28 / 34


2.4 Fault Management

Fault management is conceptually partitioned into two levels: the system top level, and interface-specific level. Both levels are alarm-level configurable and can be Major, Minor, and/or Masked. Fault management provides the alarm output through hardware output interface (on the DC power card) and visible indicator (LED). The Mini DSLAM supports query of all current alarm status. It is also able to keep 256 records of historical alarms and events respectively.

System Alarms

The Mini DSLAM provides the following System alarms:

House Keeping Alarm 1




Fan Alarm

Above Temperature

Below Temperature

Line Card unequipped

DC Power Card Fail

LT card Power Fail

LT card shutdown due to high temperature

Self-test Fail

ADSL Alarms

The Mini DSLAM provides the following ADSL alarms:

LOF (Loss of Frame) -Near End/Far End

LOS (Loss of Signal) -Near End/Far End

LOM (Loss of Margin) -Near End/Far End

LPR (Loss of Power) -Far End

LOL (Loss of Line) – Near End/Far End

ESE (Excessive Severe Errors) -Near End/Far End

UAS (Unavailable Seconds) –Near End/Far End

COMMF: Unable to communicate with peer modem -Far End

29 / 34


NOPEER: No peer present – Far End

LCD (Loss of Cell Delineation) -Near End/Far End

LORATE (Line rate is below planned rate)-Near End/Far End

NCD (No Cell Delineation) -Near End/Far End

30 / 34

Abbreviations

ADSL asymmetrical digital subscriber line ADSLx ADSL/ADSL2/ADSL2+ ANSI American National Standards Institute ATM asynchronous transfer mode CLI command line interface DSLAM digital subscriber line access multiplexer EMS element management system DSL digital subscriber line EMC electromagnetic compatibility EMI electromagnetic immunity ETSI European Telecommunications Standards Institute Mbps megabit per second LED light emitting diode POTS plain old telephone service PSTN public switched telephone network PVC permanent virtual circuit SNMP simple network management protocol UNI user-network interface

31 / 34

32 / 34

33 / 34

md-20 mini dslam - ctc u · pdf filemandatory regulations united states this section describes...

Documents