This document provides information about installing and replacing the carrierless amplitude and phase modulation (CAP) and discrete multi-tone (DMT) plain old telephone service (POTS) modules. The CAP and DMT POTS modules are field-replaceable units (FRUs) for the following systems:

Cisco 6100/6130 with NI-1 system
Cisco 6100/6130 with NI-2 system

This document includes the following sections:

CAP and DMT POTS Modules Overview

The POTS modules separate ADSL data from the POTS signals. When you are using a Cisco 6100 system, these modules provide secondary line protection.

There are two types of POTS modules available for the Cisco 6120 chassis:

8 kHz CAP
8 kHz DMT

Table 1 shows the configurations where the POTS modules can operate.

Table 1: Cisco 6100/6130 and POTS Module Compatibility

Module	CAP ATU-C Module¹	DMT-2 ATU-C Module²		Flexi ATU-C Module (CAP mode)		Flexi ATU-C Module (DMT mode)
Module	Cisco 6100	Cisco 6130	Cisco 6100	Cisco 6130	Cisco 6100	Cisco 6130	Cisco 6100
Cisco CAP POTS³	Yes	No	No	No	No	No	No
Cisco DMT POTS	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Siecor DMT POTS	No	Yes	Yes	Yes	Yes	Yes	Yes

¹CAP ATU-C modules cannot be used in a Cisco 6130 chassis.
²If you install DMT-2 ATU-C modules in the Cisco 6100/6130, you must install all DMT POTS modules in the POTS splitter chassis.
³A DOH configuration can use only CAP POTS modules.

The Cisco 6120 chassis can include up to 20 CAP or DMT POTS splitter modules. The modules can be installed in chassis slots 1 through 10, and 13 to 22, as shown in Figure 1.

Figure 1: CAP and DMT POTS Module Slots in the Cisco 6120

Note The physical pool A and physical pool B callouts in Figure 1 apply only in a DOH configuration.

Figure 2 shows the POTS module faceplates.

Figure 2: POTS Module Faceplates

Part and Tool Requirements

To install or replace the CAP or DMT POTS module, you need the following parts and tools:

CAP or DMT POTS module.
Necessary equipment for ESD protection—Required whenever you handle Cisco digital subscriber line access multiplexer (DSLAM) equipment, which includes the chassis, modules, and cards.

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

General Safety Precautions and Maintenance Guidelines

This section describes the following:

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. Modules are subject to ESD damage whenever they are removed from the chassis.

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

Caution If the modules are installed when you apply power to the system, you could damage the modules and the chassis.

Warning Use copper conductors only.

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

Warning Do not reach into a vacant slot or chassis while you install or remove a module 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 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.

Hot-Swapping Modules

The CAP or DMT POTS module supports hot swapping. Hot swapping allows you to remove, replace, and rearrange the modules without disconnecting the system power.

Module Installation and Replacement Suggestions

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

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

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

Removing and Installing a CAP or DMT POTS Module

The following sections describe how to remove, install, or replace a CAP or DMT POTS module.

Removing a CAP or DMT POTS Module

Complete the following steps to remove a CAP or DMT POTS module from the Cisco 6120 chassis:

Step 1 Lift up the ejector tab. This action disconnects the module from the backplane.

Step 2 Carefully slide the module out of the slot.

Either replace the module that you remove, or insert a blank faceplate in the empty slot. See the "Installing or Replacing a CAP or DMT POTS Module" section for POTS module 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 CAP or DMT POTS Module

Complete the following steps to install the CAP or DMT POTS module in the Cisco 6120 chassis:

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

Step 1 Hold the POTS module vertically, with the module's faceplate toward you and the connectors facing the chassis slot.

Step 2 Align the upper and lower edges of the POTS module with the upper and lower guides in the chassis slot.

Step 3 Lift up on the ejector tab and gently apply pressure to the bottom of the faceplate while pushing the module into the slot (see Figure 3).

Figure 3: POTS Module Installation

Step 4 Push on the faceplate of each module to fully seat the module.

Step 5 Press down on the ejector tab to secure the module and connect it to the backplane.

Standards and Certifications

Table 2 lists POTS module standards and certifications.

Table 2: Standards and Certifications

Category	Description
NEBS Level 3	Bellcore GR-63-CORE, GR-1089-CORE
Safety	UL 1950, 3rd Edition

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 documents listed in the "Related Documentation" section.

Access Registrar, AccessPath, Any to Any, AtmDirector, Browse with Me, CCDA, CCDE, CCDP, CCIE, CCNA, CCNP, CCSI, CD-PAC, the Cisco logo, Cisco Certified Internetwork Expert logo, CiscoLink, the Cisco Management Connection logo, the Cisco NetWorks logo, the Cisco Powered Network logo, Cisco Systems Capital, the Cisco Systems Capital logo, Cisco Systems Networking Academy, the Cisco Systems Networking Academy logo, the Cisco Technologies logo, ConnectWay, Fast Step, FireRunner, Follow Me Browsing, FormShare, GigaStack, IGX, Intelligence in the Optical Core, Internet Quotient, IP/VC, Kernel Proxy, MGX, Natural Network Viewer, NetSonar, Network Registrar, the Networkers logo, Packet, PIX, Point and Click Internetworking, Policy Builder, Precept, RateMUX, ScriptShare, Secure Script, ServiceWay, Shop with Me, SlideCast, SMARTnet, SVX, The Cell, TrafficDirector, TransPath, ViewRunner, Virtual Loop Carrier System, Virtual Voice Line, VlanDirector, Voice LAN, Wavelength Router, Workgroup Director, and Workgroup Stack are trademarks; Changing the Way We Work, Live, Play, and Learn, Empowering the Internet Generation, The Internet Economy, and The New Internet Economy are service marks; and Aironet, ASIST, BPX, Catalyst, Cisco, Cisco IOS, the Cisco IOS logo, Cisco Systems, the Cisco Systems logo, the Cisco Systems Cisco Press logo, Enterprise/Solver, EtherChannel, EtherSwitch, FastHub, FastLink, FastPAD, FastSwitch, GeoTel, IOS, IP/TV, IPX, LightStream, LightSwitch, MICA, NetRanger, Post-Routing, Pre-Routing, Registrar, StrataView Plus, Stratm, TeleRouter, and VCO are registered trademarks of Cisco Systems, Inc. or its affiliates in the U.S. and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any of its resellers. (0004R)

Table of Contents