Cisco PA-2JT2 Installation And Configuration Manual

PA-2JT2 6.3-MHz Serial Port Adapter Installation
and Configuration

Product Numbers: PA-2JT2 and PA-2JT2=

This configuration note describes how to install and configure the Japan T2 Line (JT2) 6.3-megahertz
(MHz), 2-port, serial port adapter (PA-2JT2[=]), which is used on the second-generation Versatile
Interface Processor (VIP2) in all Cisco 7500 series and in Cisco 7000 series routers using the 7000
Series Route Switch Processor (RSP7000) and 7000 Series Chassis Interface (RSP7000CI). (For
complete and specific compatibility requirements, refer to the section “Software and Hardware

Prerequisites” on page 3.)

Use this configuration note in conjunction with the configuration note Second-Generation Versatile Interface Processor (VIP2)

Installation and Configuration

This configuration note is organized into the following sections:

• Related Documentation, page 2

• JT2 Port Adapter Installation Prerequisites, page 3

• What Is the JT2 Port Adapter?, page 7

• VIP2 and the JT2 Port Adapter, page 12

• Obtaining Documentation, page 24

• Obtaining Technical Assistance, page 25

Document Contents

Corporate Headquarters:
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA

Copyright © 1997–2002. Cisco Systems, Inc. All rights reserved.

Related Documentation

Related Documentation

The documentation listed below is available online, on the Documentation CD-ROM, or as printed
documents.

Your router, switch, or gateway and the Cisco IOS software running on it contain extensive features and
functionality, which are documented in the following resources:

• Cisco IOS software:

–

For configuration information and support, refer to the modular configuration and modular
command reference publications in the Cisco IOS software configuration documentation set
that corresponds to the software release installed on your Cisco hardware.

–

To check the minimum software requirements of Cisco IOS software with the hardware installed
on your router, Cisco maintains the Software Advisor tool on Cisco.com:
http://www.cisco.com/cgi-bin/Support/CompNav/Index.pl. You must be a registered user on
Cisco.com to access this tool.

Note You can access Cisco IOS software configuration and hardware installation

and maintenance documentation on the World Wide Web at

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

• Cisco 7000 series routers:

For hardware installation and maintenance information, refer to the following publications:

–

Cisco 7000 Hardware Installation and Maintenance that shipped with your router.

–

Second-Generation Versatile Interface Processor (VIP2) Installation and Configuration

–

Fourth-Generation Versatile Interface Processor (VIP4) Installation and Configuration

–

Versatile Interface Processor (VIP6-80) Installation and Configuration

• Cisco 7500 series routers:

For hardware installation and maintenance information, refer to the following publications:

–

Cisco 7500 Installation and Configuration or the quick start guide that shipped with your router

–

Second-Generation Versatile Interface Processor (VIP2) Installation and Configuration

–

Fourth-Generation Versatile Interface Processor (VIP4) Installation and Configuration

–

Versatile Interface Processor (VIP6-80) Installation and Configuration

• For international agency compliance, safety, and statutory information for WAN interfaces:

–

Regulatory Compliance and Safety Information for the Cisco 7000 Series Routers

–

Regulatory Compliance and Safety Information for the Cisco 7500 Series Routers

–

Site Preparation and Safety Guide

• To view Cisco documentation or obtain general information about the documentation, refer to the

following sections:

–

Obtaining Documentation, page 24

–

Obtaining Technical Assistance, page 25

–

Customer service at 800 553-6387 or 408 526-7208. Customer service hours are 5:00 a.m. to
6:00 p.m. Pacific time, Monday through Friday (excluding Cisco-observed holidays). You can
also send e-mail to [e-mail].

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JT2 Port Adapter Installation Prerequisites

This section provides specific information you need to ensure a successful installation, and the following
information is included:

• Software and Hardware Prerequisites

• List of Parts and Tools, page 3

• FCC Class B Compliance, page 4

• Safety Guidelines, page 4

• Port Adapter Locations on the VIP2, page 8

Software and Hardware Prerequisites

For JT2 port adapters installed on the VIP2-40 in Cisco 7000 series or Cisco 7500 series routers,
Cisco IOS Release 11.1(12)CA1, or later, is required.

For JT2 port adapters installed on the VIP2-50 in Cisco 7000 series or Cisco 7500 series routers,
Cisco IOS Release 11.1(14)CA, or later, is required.

JT2 Port Adapter Installation Prerequisites

Note At a minimum, you must use the VIP2-40 (with 2 MB of SRAM and 32 MB of DRAM) or VIP2-50 (with

4 to 8 MB of SRAM and 32 to 128 MB of SDRAM) for use with one or two JT2 port adapters. We do
not recommend the use of any other VIP2 model with PA-2JT2.

Caution To prevent system problems, do not operate the VIP2 in Cisco 7000 series systems without the RSP7000

and RSP7000CI. The VIP2 will not operate properly with the Route Processor (RP), Switch Processor
(SP), or Silicon Switch Processor (SSP) installed in the earlier host Cisco 7000 series routers.

List of Parts and Tools

You need the following tools and parts to install a JT2 port adapter. If you need additional equipment,
contact a service representative for ordering information.

• PA-2JT2(=) and a VIP2-40(=) motherboard, with at least one available port adapter slot, and, a Cisco

7500 series router with at least one available interface processor slot, or a Cisco 7000 series router
(with an RSP7000 and RSP7000CI installed) with at least one available interface processor slot.

For specific VIP2 model requirements, refer to the note in the section “Software and Hardware

Prerequisites” on page 3.

• The appropriate Cisco IOS release loaded on your router. (For Cisco IOS software prerequisites,

refer to the section “Software and Hardware Prerequisites” on page 3.)

• One pair of unbalanced, 75-ohm (± 5% at 1 MHz), coaxial cables (with BNC connections) for each

interface port, appropriate for the port adapter interfaces on your JT2 port adapter. (75-ohm coaxial
cables are not supplied by Cisco systems; these cables are available from commercial cable
vendors.)

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JT2 Port Adapter Installation Prerequisites

The 75-ohm coaxial BNC connections must conform to JIS C5412-1976 high-frequency coaxial
C02-type connectors, which are equivalent to MIL C 3608 BNC connectors and coaxial cables. (For
specific cable requirements, refer to the section “JT2 Port Adapter Interface Connectors and Cables”
on page 10.)

Further, the 75-ohm coaxial cables must have ferrite sleeves around them to reduce the effects of
electromagnetic interference (EMI). Four ferrite sleeves are included with your JT2 port adapter
have the following specifications: 275 ohms @ 100 MHz.

• A B-type or C-type data service unit (DSU) with a 75-ohm, coaxial BNC input and an optical fiber

output, to which you attach the 75-ohm coaxial cables from the receive (RX) and transmit (TX) ports
on the JT2 port adapter. (Older A-type DSUs are not supported with PA-2JT2.)

Yo u r D SU must be capable of, and set to accept, external grounding because the JT2 port adapter’s
TX and RX connections are grounded at the router-chassis side.

• Number 1 Phillips and a 3/16-inch, flat-blade screwdriver.

• Your own ESD-prevention equipment or the disposable grounding wrist strap included with all

upgrade kits, FRUs, and spares.

FCC Class B Compliance

The equipment described in this publication generates and might radiate radio-frequency energy. If it is
not installed in accordance with Cisco’s installation instructions, it might cause interference with radio
and television reception. This equipment has been tested and found to comply with the limits for a Class
B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications
are designed to provide reasonable protection against such interference in a residential installation.
However, there is no guarantee that interference will not occur in a particular installation.

You can determine whether your equipment is causing interference by turning it off. If the interference
stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment
causes interference to radio or television reception, try to correct the interference by using one or more
of the following measures:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is,

• Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval

Safety Guidelines

make certain the equipment and the television or radio are on circuits controlled by different circuit
breakers or fuses.)

and negate your authority to operate the product.

This section provides safety guidelines you should follow when working with any equipment that
connects to electrical power or telephone wiring.

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Safety Warnings

JT2 Port Adapter Installation Prerequisites

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, might
harm you. A warning symbol precedes each warning statement.

Warning

Waarschuwing

Varoitus

Attention

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.

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.

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).

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.

Avvertenza

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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.

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.

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JT2 Port Adapter Installation Prerequisites

Advarsel

Aviso

¡Advertencia!

Varning!

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.

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.

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.

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.

Electrical Equipment Guidelines

Follow these basic guidelines when working with any electrical equipment:

• Before beginning any procedures requiring access to the chassis interior, locate the emergency

power-off switch for the room in which you are working.

• Disconnect all power and external cables before moving a chassis.

• Do not work alone when potentially hazardous conditions exist.

• Never assume that power has been disconnected from a circuit; always check.

• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe;

carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.

Telephone Wiring Guidelines

Use the following guidelines when working with any equipment that is connected to telephone wiring or
to other network cabling:

• Never install telephone wiring during a lightning storm.

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

locations.

• Never touch uninsulated telephone wires or terminals unless the telephone line has been

disconnected at the network interface.

PA-2JT2 6.3-MHz Serial Port Adapter Installation and Configuration

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• Use caution when installing or modifying telephone lines.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. Port adapters and processor modules
consist of printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)
shielding and connectors are integral components of the carrier. Although the metal carrier helps to
protect the board from ESD, use a preventive antistatic strap during handling.

Following are guidelines for preventing ESD damage:

• Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.

• Connect the equipment end of the strap to an unfinished chassis surface.

• When installing a component, use any 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 removing a component, use any available ejector levers or captive installation screws to

release the bus connectors from the backplane or midplane.

• Handle carriers by available handles or edges only; avoid touching the printed circuit boards or

connectors.

What Is the JT2 Port Adapter?

• 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 only protects

components from ESD voltages on the body; ESD voltages on clothing can still cause damage.

• Never attempt to remove the printed circuit board from the metal carrier.

Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be

between 1 and 10 megohms.

What Is the JT2 Port Adapter?

PA-2JT2 (see ) is a port adapter used on the VIP2 in the Cisco 7500 series routers, and in Cisco 7000
series routers using the RSP7000 and RSP7000CI. The JT2 port adapter is available as a spare part:
Product Number PA-2JT2=.

Figure 1 PA-2JT2, Two-Port JT2 Port Adapter (Front Panel View)

TX0

AIS

RAI

ENABLED

LOS

RX0

TX1

AIS

RAI

LOS

RX1

JT2

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What Is the JT2 Port Adapter?

Following are JT2 port adapter features and capabilities:

• Each JT2 interface port consists of two coaxial, BNC connectors.

• Provides two data terminal equipment (DTE), synchronous serial interface ports, which are

• Uses bipolar with 8-zero substitution (B8ZS) encoding.

• Supports cyclic redundancy check (CRC). (Refer to the section “Configuring CRC5” on page 18.)

• Operates at 6.312 Mbps, with 50-percent pulse-width B8Zs encoding.

• Provides an internal fixed clock rate on each JT2 interface port of 6.144 Mbps (not configurable).

• Provides the functions needed to frame a wideband payload to ITU G.704 and the Nippon Telegram

compatible with and specified by G.703a, and which permit Cisco 7000 series and Cisco 7500 series
routers to communicate over a High Speed Digital 6.3 MHz (HSD 6.3) leased line service (specified
in ITU Recommendation G.704).

The JT2 interfaces automatically use the internal clock for data transmission if no external clock is
detected. When a JT2 interface is configured with the clock source internal command, external
devices will return this clock on the JT2 interface’s receive line; therefore, all clocking is properly
synchronized. (Refer to the section “Using Software Configuration Commands Specific to the JT2

Port Adapter” on page 22

and Telephone Corporation (NTT)-specified 6.144-Mbps frame format.

• Designed to conform with the following emissions standards: FCC Class Limits (FCC 47 CFR

Part 15, Subpart B), EN55022 Class Limits, and the Japanese Voluntary Control Council for
Interference (VCCI) and CISPR 22 emission standards.

• Designed to conform with the following safety standards: UL 1950 D3 Dev., CSA 22.2 No. 950, and

TUV-IEC 950.

• Received Approval Number N97-K013-0 from the Japan Approvals Institute for

Telecommunications Equipment (JATE)

Port Adapter Locations on the VIP2

shows a VIP2 with two installed port adapters. shows a VIP2-50 with two installed port adapters. With
the VIP2 oriented as shown, the left port adapter is in port adapter slot 0, and the right port adapter is in
port adapter slot 1.

Port adapters have handles that allow for easy installation and removal; however, they are occasionally
not shown in this publication to highlight port adapter faceplate detail.

In the Cisco 7000, Cisco 7507, and Cisco 7513 chassis the VIP2 is installed vertically. In the Cisco 7010
and Cisco 7505 chassis the VIP2 is installed horizontally. There are no interface processor or port
adapter slot restrictions for the VIP2 and JT2 port adapter.

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What Is the JT2 Port Adapter?

r

Figure 2 Two Port Adapters on the VIP2-40 (Horizontal Orientation Shown)

Boot ROM

U6

U2

U4

DRAM

SIMMs

SRAM

DIMM U5

Port adapter

in slot 0

Bus connector

CPU

Figure 3 Two Port Adapters on a VIP2-50 (Horizontal Orientation Shown)

Bus connector

Boot ROM

CPU

Port adapte
in slot 1

H6448

SRAM

daughter

card

Port adapter

in slot 0

JT2 Port Adapter LEDs

The JT2 port adapter (see ) contains the enabled LED, which is standard on all port adapters; this green
LED goes on after system initialization to indicate that the JT2 port adapter has been enabled for
operation.

DRAM DIMM

Port
adapter
in slot 1

H10447

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