This document provides information about installing and replacing the quad-port Discrete Multitone-Issue 2 (DMT-2) asymmetric digital subscriber line (ADSL) Transmission Unit—central office (ATU-C) line card. The quad-port DMT-2 ATU-C line card (4xDMT-2) is a field-replaceable unit (FRU) for the following chassis:

Cisco 6130 with NI-2
Cisco 6260

This document includes the following sections:

Introduction

The 4xDMT-2 is compatible with the Cisco 6130 with NI-2 and the Cisco 6260 chassis and is designed for use in one of the following configurations:

Direct Connect with a POTS splitter chassis—Provisions one modem directly and is physically connected to one specific subscriber line through the POTS splitter chassis.
Direct Connect without a POTS splitter chassis—Provisions one modem directly and is physically connected to one specific subscriber line through the main distribution frame (MDF) connections.

The 4xDMT-2

Is T1.413 Issue 2 compliant.
Supports four ADSL modem connections.
Converts ADSL modulation from the line into digital data streams to and from the NI-2 card.
Negotiates the line rate with the CPE when it trains and bases the rate on line quality and distance.
Has top and bottom locking levers with top and bottom locking tabs.

If provisioned, the 4xDMT-2 rate adapts to the maximum bit rate negotiable on the line. The maximum bit rate settings are provisioned in the management software.

The Cisco 6130 chassis can include up to 32 4xDMT-2s for a total of 128 ADSL modem connections.

Quad-Port DMT-2 ATU-C Line Card Faceplate

Figure 1 shows a close-up of the 4xDMT-2 faceplate.

Figure 1: Quad-port DMT-2 ATU-C Line Card Faceplate

Quad-Port DMT-2 ATU-C Line Card LED Indicators

Table 1 describes LEDs on the 4xDMT-2.

Table 1: Quad-port DMT-2 ATU-C Line Card LEDs

LED	State	Function
STATUS	Green slow blinking Green solid Red Off	No errors, but no connection established. The image download is in progress. NI-2 communication established. The self-test or line card has failed. The ATU-C line card has a power failure.
ACTIVE	Green solid Off	The line card is activated. The line card is not in service.
ATU-C 1	Green solid Green blinking Off	Modem 1 is trained. Training is in progress for modem 1. Modem 1 is idle.
ATU-C 2	Green solid Green blinking Off	Modem 2 is trained. Training is in progress for modem 2. Modem 2 is idle.
ATU-C 3	Green solid Green blinking Off	Modem 2 is trained. Training is in progress for modem 2. Modem 2 is idle.
ATU-C 4	Green solid Green blinking Off	Modem 2 is trained. Training is in progress for modem 2. Modem 2 is idle.

Quad-Port DMT-2 ATU-C Line Card Block Diagram

Figure 2 is a block diagram of the 4xDMT-2.

Figure 2: Quad-Port DMT-2 ATU-C Line Card Block Diagram

Slot Configuration

In the Cisco 6130 chassis with NI-2, you must install the line cards in slots 1 through 8, 13 through 28, and 31 through 38, as shown in Figure 3. In the Cisco 6260 chassis, you must install the line cards in slots 1 to 9 or 12 to 32.

Figure 3: Quad-port DMT-2 Slot Configuration for the Cisco 6130 with NI-2 Chassis

Installation Prerequisites

This section describes software requirements and lists the parts and tools that you need to install the 4xDMT-2.

Software Requirements

Table 2 lists the Cisco IOS release that is recommended for configuring and managing the 4xDMT-2 with the Cisco 6130 with NI-2 and the Cisco 6260.

Table 2: Quad-port DMT-2 ATU-C Line Card Software Requirements

Hardware Platform	Recommended Minimum Cisco IOS Release
Cisco 6130 NI-2 DSLAM	Cisco IOS Release 12.0(5) DA CDM Release 3.2
Cisco 6260	Cisco IOS Release 12.0(5) DA CDM Release 3.0

Part and Tool Requirements

To install or replace the 4xDMT-2 line card, you need the following parts and tools:

4xDMT-2.
Necessary equipment for ESD protection—Required whenever you handle Cisco DSLAM equipment, which includes the chassis, line cards, and cards.
Flat-head screwdriver.

Note The system has no internal user-serviceable parts. However, you can add or remove a 4xDMT-2 without removing power from the system (hot swapping).

General Safety Precaution and Maintenance Guidelines

This section describes the following concepts:

General Safety Precautions

Before working on the equipment, be aware of standard safety practices and the hazards involved in working with electrical circuitry to prevent accidents. Adhere to the following cautions and warnings for safe and hazard-free installation.

Note To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information for the Cisco 6100 Series System document.

Tip In the following warnings, the terms cover panel and safety cover refer to the chassis front cover.

Caution Proper ESD protection is required whenever you handle Cisco DSLAM equipment. Installation and maintenance personnel should be properly grounded using ground straps to eliminate the risk of ESD damage to the equipment. Line cards are subject to ESD damage whenever they are removed from the chassis.

Caution Installing the line cards in the chassis with the power leads reversed can damage the line cards.

Caution If you configure power connections improperly and apply power while the line cards are installed, the line card and chassis could be damaged.

Warning Use copper conductors only.

Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.

Warning Never install telephone wiring during an electrical storm.

Warning Do not reach into a vacant slot or chassis while you install or remove a line card or a fan. Exposed circuitry could constitute an energy hazard.

Warning Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place.

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Warning The power supply circuitry for the Cisco DSLAM equipment can constitute an energy hazard. Before you install or replace the equipment, remove all jewelry (including rings, necklaces, and watches). Metal objects can come into contact with exposed power supply wiring or circuitry inside the DSLAM equipment. This could cause the metal objects to heat up and cause serious burns or weld the metal object to the equipment.

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.

Warning Use caution when installing or modifying telephone lines.

Warning Metal objects heat up when connected to power and ground, and can cause serious burns.

Warning Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.

Warning Ultimate disposal of this product should be handled according to all national laws and regulations.

Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location.

Warning The safety cover is an integral part of the product. Do not operate the unit without the safety cover installed. Operating the unit without the cover in place will invalidate the safety approvals and pose a risk of fire and electrical hazards.

Warning Connect the unit only to DC power source that complies with the Safety Extra-Low Voltage (SELV) requirements in IEC 60950 based safety standards.

Warning This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations.

Warning Care must be given to connecting units to the supply circuit so that wiring is not overloaded.

Warning Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.

Warning Do not use a telephone to report a gas leak in the vicinity of the leak.

Warning Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning.

Warning Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.

Warning Do not use this product near water; for example, near a bath tub, wash bowl, kitchen sink or laundry tub, in a wet basement, or near a swimming pool.

Hot Swapping Line Cards

The 4xDMT-2 supports hot swapping. Hot swapping allows you to remove, replace, and rearrange the line cards without disconnecting the system power. When the system detects that a line card is added or removed, it automatically runs diagnostic and discovery routines, and acknowledges the presence or absence of the line card.

If you remove and replace a 4xDMT-2 with another 4xDMT-2, the newly installed line card receives the same provisioning as the original line card. The system resumes operation without any operator intervention.

If an unprovisioned line card is installed for the first time, the system identifies it as present but unprovisioned. Instructions for provisioning the line card are found in the appropriate software guide for your chassis.

Line Card Installation and Replacement Suggestions

The following items are examples of recommended line card installation and replacement practices:

Do not force the line card into its slot. This action can damage the pins on the backplane if they are not aligned properly with the line card.
Ensure that the line card is straight and not at an angle when you install the line card in the slot. Installing the line card at an angle can damage the line card.
Fully depress the ejector tabs to ensure that the line card connector mates with the backplane correctly. Firmly seat the line card in the slot.

Any line card that is only partially connected to the backplane can disrupt system operation.

Removing a 4xDMT-2

Complete the following steps to remove a 4xDMT-2 from the chassis:

Step 1 Open the front cover on the chassis, as necessary.

Step 2 Use a flat-head screwdriver to move the locking tab from the locked to the unlocked position. Be sure to turn the locking tab so that it does not overlap the 4xDMT-2 as shown in Figure 4.

Figure 4: Positioning the Locking Tab for the 4xDMT-2

Step 3 Lift up on the ejector tab. This action disconnects the line card from the backplane.

Step 4 Carefully slide the line card out of the slot.

Either replace the line card that you remove, or insert a blank faceplate in the empty slot. See the "Installing or Replacing a 4xDMT-2" section for 4xDMT-2 installation instructions. For blank faceplate installation instructions, refer to the appropriate hardware installation guide for your chassis.

Note Blank faceplates should occupy any empty slots in the chassis.

Installing or Replacing a 4xDMT-2

Complete the following steps to install or replace the 4xDMT-2 in the chassis:

Note It is important that you complete each step before moving on to the next step.

Step 1 Open the front cover on the chassis, as necessary.

Step 2 Hold the 4xDMT-2 vertically, with the line card faceplate toward you and the connectors facing the chassis slot.

Step 3 Align the upper and lower edges of the 4xDMT-2 with the upper and lower guides in the chassis slot.

Step 4 Lift up on the ejector tab and gently apply pressure to the bottom of the faceplate while pushing the line card into the slot.

Figure 5 shows the line card installation for a Cisco 6130 with NI-2 chassis. The installation procedures will be the same for the Cisco 6260 chassis.

Figure 5: Quad-port DMT-2 ATU-C Line Card Installation

Step 5 Push on the faceplate of each line card to fully seat the line card.

Step 6 Press down on the ejector tab to secure the line card and connect it to the backplane.

Step 7 Use a flat-head screwdriver to turn the locking tab so that it overlaps the 4xDMT-2 to prevent inadvertent dislodging. Figure 6 shows how to position the locking tab.

Figure 6: Positioning the Locking Tab for the 4xDMT-2 Installation

Note It is not necessary to lock the 4xDMT-2s in the Cisco 6130 with NI-2 chassis.

Step 8 Verify that the STATUS LED is solid green after the brief self-test. If the STATUS LED is not green after the self-test, refer to the appropriate hardware installation guide for your chassis for troubleshooting procedures.

Note If you are installing the line card for the first time, refer to the provisioning procedures in the appropriate software guide for your chassis.

Traffic Handling

The maximum downstream rate for the 4xDMT-2 is 8.032 Mbps. The maximum upstream rate is 864 kbps.

Downstream refers to data that is coming from the network interface card to the subscriber lines. Upstream refers to data that is coming from the subscriber lines to the network interface card.

Standards and Certifications

Table 3 lists 4xDMT-2 standards and certifications.

Table 3: Standards and Certifications

Category	Description
International Telecommunication Union	G.992.1, Annex A; G.992.2, Annex A (G.lite)
ANSI	T1.413 Issue 2
NEBS Level 3	Bellcore GR-63-CORE, GR-1089-CORE
EMC	FCC Part 15, Class A; AS/NZS 3548; EN 55024; EN 55022; EN 50082-1
Safety	UL 1950, 3rd Edition IEC 950; EN 60950

Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.

Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).

Obtaining Technical Assistance

Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed docs, or by sending mail to Cisco.

Cisco Connection Online

Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.

You can access CCO in the following ways:

WWW: www.cisco.com
Telnet: cco.cisco.com
Modem using standard connection rates and the following terminal settings: VT100 emulation; 8 data bits; no parity; and 1 stop bit.
- From North America, call 408 526-8070
- From Europe, call 33 1 64 46 40 82

You can e-mail questions about using CCO to cco-team@cisco.com.

Technical Assistance Center

The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.

To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.

To contact by e-mail, use one of the following:

Language	E-mail Address
English	tac@cisco.com
Hanzi (Chinese)	chinese-tac@cisco.com
Kanji (Japanese)	japan-tac@cisco.com
Hangul (Korean)	korea-tac@cisco.com
Spanish	tac@cisco.com
Thai	thai-tac@cisco.com

In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:

Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate and value your comments.

This document is to be used in conjunction with the Related Documentation publication.

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