This document provides the features and procedures for installing and replacing the Cisco 6260 Input/Output (I/O) module on the Cisco 6260 chassis. The I/O module is a field-replaceable unit (FRU).

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

This document includes the following sections:

Introduction

A Cisco 6260 chassis must have an I/O module installed. The I/O module is delivered installed near the top of the Cisco 6260 chassis, just below the ten RJ-21 (Champ) subscriber connectors. Figure 1 shows the location of the I/O module on the chassis.

Figure 1: I/O Module Location on the Cisco 6260 Chassis

I/O Module Types

There are three types of I/O modules for the Cisco 6260 chassis:

E3—Provides the Cisco 6260 chassis with a trunk and subtend WAN interface that can be used either to connect to the ATM network or to subtend the chassis to other DSLAMS. The E3 I/O module also provides the alarm pinouts for the Cisco 6260 system.

Note When the DS3/2DS3 NI-2 card is installed in the Cisco 6260 chassis with an E3 I/O module installed, the DS3/2DS3 NI-2 card assumes E3 functionality.

: The following fixtures reside on the front of the E3 I/O module:
: Figure 2 shows a close-up of the E3 I/O module including the location of the wire-wrap pins.

Figure 2: E3 I/O Module

E1—Provides eight individual E1 interfaces that can be allocated as either individual E1 trunk and subtend interfaces, or as inverse multiplexing over ATM (IMA) group trunk and subtend interfaces. Also, the E1 I/O module provides the alarm pinouts for the Cisco 6260 system.

: The following fixtures reside on the front of the E1 I/O module:
: Figure 3 shows a close-up of the E1 I/O module, including the location of the wire-wrap pins.

Figure 3: E1 I/O Module

OC-3c—Provides six rows of six wire-wrap pins located on the right side of the I/O module faceplate that support central office alarm relay interfaces (visual and audible) and provide the BITS clock inputs.

: No trunk or subtending port connectors are needed on the OC-3c I/O module. These connectors are present on the OC-3c/OC-3c NI-2 card faceplate.
: Figure 4 shows a close-up of the OC-3c I/O module including the location of the wire-wrap pins.

Figure 4: OC-3c I/O Module

I/O Module Wire-Wrap Pins

There are 36 wire-wrap pins located on the right side of each I/O module faceplate that support

Central office alarm relay interfaces (visual and audible critical, major, and minor).
BITS clock input circuits.
Wire-wrap and socket-type connections.

Both the alarm relays and the BITS clock connections are optional. If you connect the alarm relays, they transmit critical, major, and minor alarms to a separate, external alarm device. The alarm device uses a bell, light, or some other signal to alert service personnel to the change in system status. If you connect the BITS interface, the Cisco 6260 can receive a clock signal from a T1/E1 line.

Figure 5 shows a close-up of the wire-wrap pins.

Figure 5: I/O Module Wire-Wrap Pins Close-Up

These pins support the following items:

Visual critical
Visual major
Visual minor
Audible critical
Audible major
Audible minor
Power module alarms
Remote alarm cut off
Reserved (several pins are reserved for future specification)

Each of the wire-wrap pins is connected to the NI-2 cards that are present in the Cisco 6260 chassis; however, only one NI-2 card manages the alarms. The alarm cutoff (ACO) switch that is located on the NI-2 card faceplate shuts off the audible alarms generated by the Cisco 6260 system software.

One of the alarm relay functions provided by the wire-wrap connector is an ACO circuit that you can wire to your external alarm device. To use this feature, connect the alarm device so that it can close the contact between pin 5 and pin 6 in row 5.

The connector also provides contacts for the following features, all of which can be used (or not used) separately:

Audible alarms—Wire pins whose signals begin with AUD
Visible alarms—Wire pins whose signals begin with VIS
Power alarms—Wire pins whose signals begin with PEM
BITS clock—Wire pins whose signals begin with RX_BITS

Note There is one set of contacts for audible alarms and one set for visual alarms. You can use either or both sets of contacts.

You can wire the alarm relay contacts as normally open (NO) or normally closed (NC). (One exception is for the ACO circuit, which can be wired as NO only.) Use common (CO) pins for both the NO and NC wiring methods.

Wiring Method	Pins to Use
Normally open	Pin 2 in rows 1, 2, 3, 4 (NO) Pin 5 in rows 1, 2, 3, 4, 5 (NO) Pin 1 in rows 1, 2, 3, 4 (CO) Pin 4 in rows 1, 2, 3, 4 (CO) Pin 6 in row 5 (GND¹)
Normally closed	Pin 3 in rows 1, 2, 3, 4 (NC) Pin 6 in rows 1, 2, 3, 4 (NC) Pin 1 in rows 1, 2, 3, 4 (CO) Pin 4 in rows 1, 2, 3, 4 (CO

¹GND = ground

Table 1 maps the wire-wrap pins to the alarms supported by the NI-2 card through the Cisco 6260 I/O module.

Table 1: I/O Module Wire-Wrap Pin Mapping

Pin	Row 1	Row 2	Row 3	Row 4	Row 5	Row 6
1	PEM¹1_BR²_CO	AUD³_CRIT⁴_CO	AUD_MIN⁵_CO	VIS⁶_MAJ⁷_CO	Reserved	RX_BITS⁸_TIPA
2	PEM1_BR_NO	AUD_CRIT_NO	AUD_MIN_NO	VIS_MAJ_NO	Reserved	RX_BITS_RINGA
3	PEM1_BR_NC	AUD_CRIT_NC	AUD_MIN_NC	VIS_MAJ_NC	Reserved	RX_BITS_GND/GND
4	PEM2_BR_CO	AUD_MAJ_CO	VIS_CRIT_CO	VIS_MIN_CO	Reserved	RX_BITS_TIPB
5	PEM2_BR_NO	AUD_MAJ_NO	VIS_CRIT_NO	VIS_MIN_NO	ACO_NO	RX_BITS_RINGB
6	PEM2_BR_NC	AUD_MAJ_NC	VIS_CRIT_NC	VIS_MIN_NC	GND	RX_BITS_GND/GND

¹PEM = power entry module
²BR = breaker
³AUD = audible
⁴CRIT = critical alarm
⁵MIN = minor alarm
⁶VIS = visible
⁷MAJ = major alarm
⁸RX_BITS = receive building-integrated timing supply

Note Due to an error in Cisco 6260 backplane routing, the pin labels for PEM1_BREAKER_NO and PEM1_BREAKER_NC are reversed when they reach the PEM. Alarm contact pins on the E1 I/O module are labeled correctly.

The same issue is true for the PEM2_BREAKER_NO and PEM2_BREAKER_NC pin labels.

The pins for the following categories are rated to a maximum of 60 VDC and 0.5 amps.

AUD_CRIT/AUD_MAJ
AUD_MIN/VIS_CRIT
VIS_MAJ/VIS_MIN

Caution Use extreme caution when wire-wrapping the pin connections for the STAT_ALARMS and BITS_A/BITS_B pins. Incorrect wire connections will cause damage to the equipment.

I/O Module and NI-2 Card Compatibility

Table 2 details the I/O modules that are described in this document, as well as the associated product number and NI-2 card compatibility.

Table 2: I/O Module and NI-2 Card Compatibility

I/O Module	Product Number	NI-2 Card
I/O Module	Product Number	DS3/2DS3	DS3+T1/E1 IMA	OC-3c/OC-3c
E3	IO-E3x2E3=	Yes	No	No
E1	IO-8XE1IMA=	No	Yes	No
OC-3c	IO-BOARD-1-62=	No	No	Yes

I/O Module Specifications

Table 3 details the physical specifications for the E3, E1, and OC-3c I/O modules.

Table 3: I/O Module Specifications

Specification	E3	E1	OC-3c
Dimensions	Height: 2.34 in. (5.94 cm) Depth: 1.19 in. (3.022 cm) Width: 17.0 in. (43.18 cm)	Height: 2.34 in. (5.94 cm) Depth: 1.18 in. (2.997 cm) Width: 17.0 in. (43.18 cm)	Height: 2.34 in. (5.94 cm) Depth: 0.785 in. (1.99 cm) Width: 17.0 in. (43.18 cm)
Weight	1.75 lb (0.79 kg)	1.65 lb (0.75 kg)	1.2 lb (0.54 kg)
External interfaces	Three E3 (44.736 Mbps) coaxial ports	Eight E1 (2.048 Mbps) receptacle connectors	Not applicable
Connector type	E3—BNC	E1—RJ-48	Not applicable
Power consumption	Not applicable.	Not applicable.	Not applicable
Minimum software and network management requirement	Cisco IOS—Release 12.1(4)DA CDM¹—Release 3.3 (optional)	Cisco IOS—Release 12.1(7)DA 2 CDM—Release 3.3(3) (optional)	Cisco IOS—Release 12.0(5)DA CDM—Release 3.0 (optional)

¹CDM = Cisco DSL Manager

Part and Tool Requirements

To install or remove the I/O module, you need the following parts and tools:

I/O module—E3, E1, or OC-3c version.
Coaxial cable for an E3 connection, as necessary—Type 734A or equivalent (75 ohm double shielded, minimum coverage 80% braid and 100% foil), or type 735A or equivalent.

: Use AIM Electronics BNC Co-Axial Type 3 Piece Connector part # 27-9023 or equivalent only.

E1 trunk—Industry standard E1 twisted-pair wire (use two-pair stock only).
E1 subtend—Industry standard E1 twisted-pair wire (use two-pair stock only).
Ferrites that yield an impedance of 53 ohms at 25 MHz and 177 ohms at 100 MHz are to be used for the E1 trunk or subtended connections if unshielded cable is used for FCC Class B or EN55022 Class B compliance.
Wire for pin connections—24 AWG or thicker industry standard E1 cable.
Wire stripper.
Wire-wrapping tool.
Necessary equipment for ESD protection—Required whenever you handle Cisco DSLAM equipment, which includes the chassis, modules, and cards.
No. 1 Phillips-head screwdriver.

General Safety Precautions and Maintenance Guidelines

This section describes the following areas:

General Safety Precautions

Before working on the equipment, be aware of standard safety guidelines and the hazards involved in working with electrical circuitry to prevent accidents. Adhere to the following cautions and warnings and those throughout the guide 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 6260 System document that accompanied this product.

Caution Before you start the installation procedures, read the entire document for important information and safety warnings.

Caution Proper ESD protection is required whenever you handle Cisco 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 Use extreme care when removing or installing connectors so that you do not damage them.

Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.

Waarschuwing

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.

Varoitus

Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

Attention

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.

Warnung

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.

Avvertenza

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.

Advarsel

Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.

Aviso

Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.

¡Advertencia!

Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.

Varning!

Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.

Warning High performance devices on this card can get hot during operation. To remove the card, hold it by the faceplate and bottom edge. Allow the card to cool before touching any other part of it or before placing it in an antistatic bag.

Warning To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles on the port adapters; these types of handles are not designed to support the weight of the unit. Lift the unit only by grasping the chassis underneath its lower edge.

Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages.

Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:

—This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

—When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

—If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Warning Removing I/O modules, CPU cards, fans, and power supplies can expose you to high-energy (high-amperage) circuits and possible ejection of molten metal or to the shock hazard of telephony circuit voltages. Be sure to remove all rings, watches, and other jewelry from fingers, wrists, and arms before removing panels and devices.

Warning Before working on a system that has a standby/off switch, turn off the power by pressing the power switch to standby and unplug the power cord.Use copper conductors only.

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

Warning The E3 ports are not intended to be connected to cables that run outside the building where it is installed. For any connections outside the building, the E3 ports must be connected to a network termination unit (NTU). NTU devices should comply with appropriate national safety standards such as UL 1950, CSA 950, EN 60950, IEC 950, and AS 3260.

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 card, 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 Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Warning When installing the unit, the ground connection must always be made first and disconnected last.

Warning For personal safety, the ground wire must connect to safety (earth) ground at both the equipment and supply side of the DC wiring (unless the local electrical code requirements are different).

Warning This equipment needs to be grounded. Use a green and yellow 12 to 14 AWG ground wire to connect the host to earth ground during normal use.

Warning Incorrect connection of this or connected equipment to a general purpose outlet could result in a hazardous situation.

Warning Read the installation instructions before you connect the system to its power source.

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 To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.

Warning Hold the PEM by the sheet-metal carrier (top and front) only. Internal components may be hot.

Warning The customer 48 volt power system must provide reinforced insulation between the primary AC power and the 48 VDC output.

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

Warning The power supply circuitry for the 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 equipment. This could cause the metal objects to heat up and cause serious burns or weld the metal object to the equipment.

Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.

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

Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is off and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected.Only trained and qualified personnel should be allowed to install or replace this equipment.

Warning The ports labeled "CNSL," "AUX," "ENET," "Tx," and "Rx (E3)" are safety extra-low voltage (SELV) circuits. SELV circuits should only be connected to other SELV circuits. Because the Basic Rate Interface (BRI) circuits are treated like telephone-network voltage (TNV), avoid connecting the SELV circuit to the TNV circuits.

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

Warning This equipment is to be installed and maintained by service personnel only as defined by AS/NZS 3260 Clause 1.2.14.3 Service Personnel.

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 Network hazardous voltages are present in the T1 PRI cable. If you detach the cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages are also present in the area of the T1 PRI (RJ-48C) ports, regardless of whether power is off or on.

Warning The telecommunications lines must be disconnected 1) before unplugging the main power connector or 2) while the housing is open.

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 Hazardous network voltages are present in WAN ports regardless of whether power to the router is OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach the end away from the router first.

Warning To reduce the risk of electric shock when servicing any individual unit, disconnect the power cord or cords that connect the unit to the AC powerstrip or DC busbar. When working with a DC system, remove the busbar connector before working on a device. Exposed live voltages are present at the device end; exposure to these may cause injury.

Warning A voltage mismatch can cause equipment damage and may pose a fire hazard. If the voltage indicated on the label is different from the power outlet voltage, do not connect the chassis to that receptacle.

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.

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

Warning During line card installation, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself.

Warning Ethernet cables must be shielded when used in a central office environment.

Warning An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug.

Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use.

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

Warning Two people are required to lift the chassis. Grasp the chassis underneath the lower edge and lift with both hands. To prevent injury, keep your back straight and lift with your legs, not your back.

Warning If you use wiring terminations, use only the recommended ferrules. These terminations should be the appropriate size for the wires and should clamp the conductor firmly.

Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the power terminals on the chassis.

Warning This unit has more than one power supply connection; all connections must be removed completely for you to completely remove power from the unit.

Warning Only a DC power source that is isolated from AC mains with reinforced insulation, and that complies with the other safety extra-low voltage (SELV) requirements in UL950, CSA 950, EN 60950, and IEC950, can be connected to a Cisco 6200 system. This requirement assures that in a catastrophic power source fault condition, hazardous voltages are not present on power terminals and connectors.

General Maintenance Guidelines

This section covers the following topics:

Installation and Replacement Suggestions

The following examples list recommended installation and replacement practices for the Cisco 6260 I/O modules.

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

Do not force the module onto the chassis connectors. Ensure that the I/O module is straight and parallel to the chassis when you install the module onto the connectors. The pins on the connectors can be damaged if the card is not installed correctly.
Firmly press on the module to ensure that the connectors mate with the chassis correctly.

Hot Swapping Modules

Hot swapping allows you to remove and replace the module without disconnecting the system power. The Cisco 6260 chassis supports hot swapping for the I/O module. Removing the I/O module will interrupt the service for the entire system until it is replaced.

Caution The I/O module must be installed and replaced by a trained technician only.

Preventing Electrostatic Discharge Damage

Proper ESD protection is required whenever you handle Cisco equipment. ESD damage, which can occur when electronic cards or components are improperly handled, results in complete or intermittent failures. Use an antistatic strap during handling.

Follow these guidelines to prevent ESD damage:

Always use an ESD ankle or wrist strap and ensure that it makes good skin contact.
Connect the equipment end of the strap to the ESD jack on the front right side of the chassis.
When you install a component, use available ejector levers or captive installation screws to properly seat the bus connectors in the backplane or midplane. These devices prevent accidental removal, provide proper grounding for the system, and help to ensure that bus connectors are properly seated.
When you remove a component, use available ejector levers or captive installation screws to release the bus connectors from the backplane or midplane.
Handle the I/O module by the edges only; avoid touching the printed circuit boards or connectors.
Place a removed component board-side-up on an antistatic surface or in a static-shielding container. If you plan to return the component to the factory, immediately place it in a static-shielding container.
Avoid contact between the printed circuit boards and clothing. The wrist strap protects components from ESD voltages on the body only; ESD voltages on clothing can still cause damage.

Caution Periodically check the resistance value of the antistatic strap. Ensure that the measurement is between 1 and 10 megohms.

Removing and Installing the I/O Module

The following sections describe how to remove, install, or replace an I/O module.

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.

Removing the I/O Module

Complete the following steps to remove the I/O module from the Cisco 6260 chassis.

Note It is not necessary to power off the Cisco 6260 system to remove and replace the I/O module.

Tip Cisco recommends that you label each cable and wire at both ends to identify its destination.

Step 1 Connect a grounding strap to the ESD grounding jack that is located on the top right of the Cisco 6260 card cage.

Step 2 If you have an E3 I/O module installed, disconnect the E3 BNC connectors from P1, P2, and P3 on the E3 I/O module, if applicable.

Step 3 If you have an E1 I/O module installed, disconnect the E1 RJ-45 cables from the RJ-48 receptacle connectors on the front of the E1 I/O module, if applicable.

Step 4 Remove all wire-wrap pin connections from the I/O module.

Step 5 Locate the two retaining screws on the faceplate of the I/O module that secure it to the Cisco 6260 chassis (Figure 6).

Figure 6: I/O Interface Module Retaining Screws

Step 6 Use a Phillips-head screwdriver to remove the I/O module retaining screws.

Step 7 Remove the I/O module from the chassis by carefully pulling the module horizontally away from the chassis.

See the "Installing and Cabling the I/O Module" section for I/O module installation procedures.

Installing and Cabling the I/O Module

Complete the following steps to install and cable the I/O module on the Cisco 6260 chassis.

Tip The term subtending refers to the host chassis, and subtended refers to the downstream chassis in a subtended network.

Cisco recommends that you label each cable and wire at both ends to identify its destination.

Step 1 Connect a grounding strap to the ESD grounding jack that is located on the top right of the Cisco 6260 card cage.

Step 2 Carefully align the I/O module with the Cisco 6260 backplane connectors on the upper front side of the chassis.

Step 3 Hold the I/O module horizontally and align the holes on the I/O module over the two retaining screws.

Step 4 Carefully press the I/O module onto the Cisco 6260 connectors on the chassis backplane until the I/O module is seated fully.

Step 5 Use a Phillips-head screwdriver and two retaining screws to attach the I/O module to the chassis.

Step 6 Complete the following steps to cable the I/O module for E3 subtending. If you are installing an E1 subtended network, proceed to Step 7. If you are installing an OC-3c subtended network, proceed to Step 8. If you are not installing a subtended network, proceed to Step 9.

Note The P2 and P3 E3 BNC connectors are used when installing an E3 subtended network configuration.

For more information on an E3 subtended network configuration, refer to the Cisco 6260 Hardware Installation Guide.

a. On the subtending host chassis I/O module, attach one end of a BNC cable to the TX E3 BNC connector.

b. On the first subtended node chassis, attach the end of the BNC cable used in Step 6 a to the RX E3 BNC connector.

c. Repeat Step 6 a and Step 6 b to connect the subtending host chassis to each subtended node chassis.

Step 7 Complete the following steps to cable the I/O module for E1 subtending.

Note For more information on an E1 subtended network configuration, refer to the Cisco 6260 Hardware Installation Guide.

a. Connect one end of an RJ-45 crossover cable to one of the RJ-48 receptacle connectors on the E1 I/O module on the subtending host chassis.

b. Connect the other end of the cable used in Step 7 a to one of the RJ-48 receptacle connectors on the E1 I/O module in a subtended node chassis.

c. Repeat Step 7 a and Step 7 b to connect the subtending host chassis to each subtended node chassis.

Note If you are using an E1 trunk to the network, the trunk connection will originate at one of the RJ-48 receptacle connectors on the E1 I/O module. Therefore, you can only have seven subtended node chassis.

Step 8 Complete the following steps to cable the I/O module for OC-3c subtending.

Note For more information on an OC-3c subtended network configuration, refer to the Cisco 6260 Hardware Installation Guide.

a. Verify that the OC-3c/OC-3c NI-2 card is in slot 10 of the Cisco 6260 chassis (or slot 11, if you are installing a secondary card for NI-2 redundancy).

b. Locate the trunk 1 interface connectors (TX and RX) and the subtend 2 interface connectors (TX and RX) on the front of each OC-3c/OC-3c NI-2 card.

c. Attach an OC-3c fiber-optic cable to the TX subtend 2 interface connector in the inset on the faceplate of the OC-3c/OC-3c NI-2 card in the subtending host chassis.

d. Attach the other end of the cable that you used in Step 8 c to the RX trunk 1 interface connector in the inset on the faceplate of the OC-3c/OC-3c NI-2 card in the subtended node chassis.

e. Attach an OC-3c fiber-optic cable to the RX subtend 2 interface connector in the inset on the faceplate of the OC-3c/OC-3c NI-2 card in the subtending host chassis.

f. Attach the other end of the cable that you used in Step 8 e to the TX trunk 1 interface connector in the inset on the faceplate of the OC-3c/OC-3c NI-2 card in the second subtended node chassis.

g. To connect your system with APS link redundancy, repeat Step 8 a through Step 8 f for the secondary NI-2 cards in slot 11 of each host and subtending chassis.

Step 9 Complete the following steps to connect the E3 I/O module to the network using an E3 connection. If you are installing an E1 I/O module, skip to Step 10. If you are installing an E1 group trunk interface, skip to Step 11. For instructions on connecting wire-wrap pins, skip to Step 12.

a. Attach one end of a coaxial cable (type 734A or equivalent) to the P1 transmit E3 BNC connector (TX) on the I/O module.

b. Attach the end of the cable that is used in Step 9 a, which originates at the P1 TX E3 BNC connector, to the ATM switch.

c. Attach one end of a coaxial cable (type 734A or equivalent) to the P1 receive E3 BNC connector (RX) on the I/O module.

d. Attach the end of the cable that is used in Step 9 c, which originates at the P1 RX E3 BNC connector, to the ATM switch.

Step 10 Complete the following steps to connect the E1 I/O module to the network using an E1 connection.

a. Connect one end of an RJ-45 cable to one of the RJ-48 receptacle connectors on the E1 I/O module. If you have a subtended network configuration installed, this connection must be made to the E1 I/O module in the subtending host chassis.

b. Connect the other end of the cable used in Step 10 a to the ATM switch.

Note Verify that the pinouts of the RJ-45 cable connect transmit to receive and receive to transmit.

Step 11 If you are installing an E1 IMA group trunk interface, complete the following steps.

Note The physical links should be approximately the same length to avoid excessive intragroup delay. Cisco recommends that all of the links in an IMA group be bundled together between the source and the destination.

For more information on how to configure an IMA group interface, refer to the T1/E1 Inverse Multiplexing Over ATM feature module.

a. Connect one end of an RJ-45 cable to one of the RJ-48C receptacle connectors on the E1 I/O module.

b. Connect the other end of the cable used in Step 11 a to the ATM switch.

c. Repeat Step 11 a and Step 11 b for each E1 connection in the IMA group.

Step 12 Connect the external alarm device and BITS clock to the wire-wrap pins on the I/O module at the top of the chassis, as specified in the "I/O Module Wire-Wrap Pins" section.

Note This step is optional.

The alarm and status inputs on the I/O module should not be connected to anything over 20 feet away.

a. Measure one strand of twisted-pair wire (24 AWG industry standard T1 cable) long enough to connect to the appropriate pin.

: See Figure 7 for a close-up of the pinouts that are located on the I/O module. For pinout descriptions, see Table 1.

Figure 7: I/O Wire-Wrap Pins—Close-up

b. Use a wire stripper to remove the casing from both ends of the wire.

c. Use a wire-wrapping tool to attach the wire to the appropriate pin.

d. Use a wire-wrapping tool to attach the other end of the wire that is used in Step 7c to either the BITS clock source or the alarm relay contact.

e. Repeat this step to wire wrap all the necessary pins.

Step 13 Reboot the system to reassociate the system MAC address.

Standards and Certifications

Table 4 details the I/O module standards and certifications:

Table 4: I/O Module Standards and Certifications

Category	Description
Emissions	FCC 47CFR15:1997 Class A CSA Class A EN55022:1998 Class A CISPR22:1997 AS/NZ 3548:1995 Class A VCCI V-3/97.04 Class A CNS-13438 Class A (Taiwan)
Immunity	ETSI ETS 300 386-1 Public Telecommunications Network Equipment EMC requirements. (Classification of equipment environment is for locations other than telco centers—High priority of service.) ETSI EN 300 386-2:1997 Public Telecommunications Network Equipment EMC requirements. (Classification of equipment environment is for locations other than telco centers—High priority of service.) ETS 300 132-2 Sections 4.8, 4.9 EN50082-2 Electromagnetic compatibility—Generic Standard, Industrial Environment EN61000-4-2, ESD Level 4 (15 kV air, 8 kV contact) EN61000-4-3, RFI Level 3 (10 v/m) EN61000-4-4, EFT/Burst, Level 4 EN61000-4-5, Surge, 500V common mode at 12 ohms impedance, 500V differential mode at 2 ohms impedance. EN61000-4-6, RF conducted, Level 3 (10 Vrms) ITU-T K.20, K.21
Telecom	CTR 24 CTR 12/13
Safety	UL 1950 EN60950 CSA C22.2 No. 950 AUSTEL TS001 AS/NZS 3260

Emissions Statements

This section contains statements on Cisco 6260 compliance to the emissions standards of the United States, Canada, and Japan.

Statement for the United States—FCC Class A

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case you are required to correct the interference at your own expense.

Modifying the equipment without Cisco authorization may result in the equipment no longer complying with FCC requirements for Class A digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense.

Statements for Canada

English—This Class A digital apparatus complies with Canadian ICES-003.

French—Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

Statement for Japan

This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.

Obtaining Documentation

These sections explain how to obtain documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at this URL:

http://www.cisco.com

Translated documentation is available at this URL:

http://www.cisco.com/public/countries_languages.shtml

Documentation CD-ROM

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

Ordering Documentation

You can order Cisco documentation in these ways:

Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Networking Products MarketPlace:

: http://www.cisco.com/cgi-bin/order/order_root.pl

Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

: http://www.cisco.com/go/subscription

Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, U.S.A.) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).

Documentation Feedback

You can submit comments electronically on Cisco.com. In the Cisco Documentation home page, click the Fax or Email option in the "Leave Feedback" section at the bottom of the page.

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

You can submit your comments by mail by using the response card behind the front cover of your document or by writing to the following address:

Cisco Systems
Attn: Document Resource Connection
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San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain online documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.

Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you with these tasks:

Streamline business processes and improve productivity
Resolve technical issues with online support
Download and test software packages
Order Cisco learning materials and merchandise
Register for online skill assessment, training, and certification programs

If you want to obtain customized information and service, you can self-register on Cisco.com. To access Cisco.com, go to this URL:

http://www.cisco.com

Technical Assistance Center

The Cisco Technical Assistance Center (TAC) is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two levels of support are available: the Cisco TAC Web Site and the Cisco TAC Escalation Center.

Cisco TAC inquiries are categorized according to the urgency of the issue:

Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities, product installation, or basic product configuration.
Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.
Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.
Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.

The Cisco TAC resource that you choose is based on the priority of the problem and the conditions of service contracts, when applicable.

Cisco TAC Web Site

You can use the Cisco TAC Web Site to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to this URL:

http://www.cisco.com/tac

All customers, partners, and resellers who have a valid Cisco service contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to this URL to register:

http://www.cisco.com/register/

If you are a Cisco.com registered user, and you cannot resolve your technical issues by using the Cisco TAC Web Site, you can open a case online by using the TAC Case Open tool at this URL:

http://www.cisco.com/tac/caseopen

If you have Internet access, we recommend that you open P3 and P4 cases through the Cisco TAC Web Site.

Cisco TAC Escalation Center

The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case.

To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to this URL:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled: for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). When you call the center, please have available your service agreement number and your product serial number.

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