Product Numbers: WS-X6608-E1 and WS-X6608-T1
This publication describes how to install the
Catalyst 6500 series 8-port T1/E1 PSTN interface modules.
Contents
This publication consists of the following
sections:
•
Safety Overview
•Front Panel Description
•Specifications
•Installing the 8-Port E1/T1 PSTN
Interface Module
•Connecting a Cable to the 8-Port
PSTN Interface Module Port
•What to Do After Installing the
8-Port T1/E1 PSTN Interface Module
•Obtaining Documentation and
Submitting a Service Request
Safety Overview
Safety warnings appear throughout this
publication in procedures that may harm you if performed
incorrectly. A warning symbol precedes each warning statement.
Note For a complete description of safety and compliance
requirements, refer to the Regulatory
Compliance and Safety Information for the Catalyst 6500 Series
Switches document.
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Warning
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IMPORTANT SAFETY INSTRUCTIONS
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
translated safety warnings that
accompanied this device.
Note: SAVE THESE INSTRUCTIONS
Note: This documentation is to be used
in conjunction with the specific product installation guide that
shipped with the product. Please refer to the Installation Guide,
Configuration Guide, or other enclosed additional documentation for
further details.
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Waarschuwing
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BELANGRIJKE VEILIGHEIDSINSTRUCTIES
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 de standaard
praktijken om ongelukken te voorkomen. Voor een vertaling van de
waarschuwingen die in deze publicatie verschijnen, dient u de
vertaalde veiligheidswaarschuwingen te raadplegen die bij dit
apparaat worden geleverd.
Opmerking BEWAAR DEZE INSTRUCTIES.
Opmerking Deze documentatie dient
gebruikt te worden in combinatie met de installatiehandleiding voor
het specifieke product die bij het product wordt geleverd.
Raadpleeg de installatiehandleiding, configuratiehandleiding of
andere verdere ingesloten documentatie voor meer informatie.
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Varoitus
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TÄRKEITÄ TURVALLISUUTEEN LIITTYVIÄ
OHJEITA
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 asiakirjassa esitettyjen
varoitusten käännökset löydät laitteen mukana toimitetuista
ohjeista.
Huomautus SÄILYTÄ NÄMÄ OHJEET
Huomautus Tämä asiakirja on tarkoitettu
käytettäväksi yhdessä tuotteen mukana tulleen asennusoppaan kanssa.
Katso lisätietoja asennusoppaasta, kokoonpano-oppaasta ja muista
mukana toimitetuista asiakirjoista.
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Attention
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IMPORTANTES INFORMATIONS DE SÉCURITÉ
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 les consignes de sécurité traduites qui accompagnent cet
appareil.
Remarque CONSERVEZ CES INFORMATIONS
Remarque Cette documentation doit être
utilisée avec le guide spécifique d'installation du produit qui
accompagne ce dernier. Veuillez vous reporter au Guide
d'installation, au Guide de configuration, ou à toute autre
documentation jointe pour de plus amples renseignements.
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Warnung
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WICHTIGE SICHERHEITSANWEISUNGEN
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 sind im Lieferumfang des Geräts enthalten.
Hinweis BEWAHREN SIE DIESE
SICHERHEITSANWEISUNGEN AUF
Hinweis Dieses Handbuch ist zum
Gebrauch in Verbindung mit dem Installationshandbuch für Ihr Gerät
bestimmt, das dem Gerät beiliegt. Entnehmen Sie bitte alle weiteren
Informationen dem Handbuch (Installations- oder
Konfigurationshandbuch o. Ä.) für Ihr spezifisches Gerät.
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Figyelem!
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FONTOS BIZTONSÁGI ELÕÍRÁSOK
Ez a figyelmezetõ jel veszélyre utal.
Sérülésveszélyt rejtõ helyzetben van. Mielõtt bármely berendezésen
munkát végezte, legyen figyelemmel az elektromos áramkörök okozta
kockázatokra, és ismerkedjen meg a szokásos balesetvédelmi
eljárásokkal. A kiadványban szereplõ figyelmeztetések fordítása a
készülékhez mellékelt biztonsági figyelmeztetések között található.
Megjegyzés ÕRIZZE MEG EZEKET AZ
UTASÍTÁSOKAT!
Megjegyzés Ezt a dokumentációt a
készülékhez mellékelt üzembe helyezési útmutatóval együtt kell
használni. További tudnivalók a mellékelt Üzembe helyezési
útmutatóban (Installation Guide), Konfigurációs útmutatóban
(Configuration Guide) vagy más dokumentumban találhatók.
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Avvertenza
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IMPORTANTI ISTRUZIONI SULLA SICUREZZA
Questo simbolo di avvertenza indica un
pericolo. La situazione potrebbe causare infortuni alle persone.
Prima di intervenire su qualsiasi apparecchiatura, occorre essere
al corrente dei pericoli relativi ai circuiti elettrici e conoscere
le procedure standard per la prevenzione di incidenti. Per le
traduzioni delle avvertenze riportate in questo documento, vedere
le avvertenze di sicurezza che accompagnano questo dispositivo.
Nota CONSERVARE QUESTE ISTRUZIONI
Nota La presente documentazione va
usata congiuntamente alla guida di installazione specifica spedita
con il prodotto. Per maggiori informazioni, consultare la Guida
all'installazione, la Guida alla configurazione o altra
documentazione acclusa.
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Advarsel
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VIKTIGE SIKKERHETSINSTRUKSJONER
Dette varselssymbolet betyr fare. Du
befinner deg i en situasjon som kan forårsake personskade. Før du
utfører arbeid med utstyret, bør du være oppmerksom på farene som
er forbundet med elektriske kretssystemer, og du bør være kjent med
vanlig praksis for å unngå ulykker. For å se oversettelser av
advarslene i denne publikasjonen, se de oversatte
sikkerhetsvarslene som følger med denne enheten.
Merk TA VARE PÅ DISSE INSTRUKSJONENE
Merk Denne dokumentasjonen skal brukes
i forbindelse med den spesifikke installasjonsveiledningen som
fulgte med produktet. Vennligst se installasjonsveiledningen,
konfigureringsveiledningen eller annen vedlagt
tilleggsdokumentasjon for detaljer.
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Aviso
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INSTRUÇÕES IMPORTANTES DE SEGURANÇA
Este símbolo de aviso significa perigo.
O utilizador encontra-se numa situação que poderá ser causadora de
lesões corporais. Antes de iniciar a utilização de qualquer
equipamento, tenha em atenção os perigos envolvidos no manuseamento
de circuitos eléctricos e familiarize-se com as práticas habituais
de prevenção de acidentes. Para ver traduções dos avisos incluídos
nesta publicação, consulte os avisos de segurança traduzidos que
acompanham este dispositivo.
Nota GUARDE ESTAS INSTRUÇÕES
Nota Esta documentação destina-se a ser
utilizada em conjunto com o manual de instalação incluído com o
produto específico. Consulte o manual de instalação, o manual de
configuração ou outra documentação adicional inclusa, para obter
mais informações.
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¡Advertencia!
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INSTRUCCIONES IMPORTANTES DE SEGURIDAD
Este símbolo de aviso indica peligro.
Existe riesgo para su integridad física. Antes de manipular
cualquier equipo, considere los riesgos de la corriente eléctrica y
familiarícese con los procedimientos estándar de prevención de
accidentes. Vea las traducciones de las advertencias que acompañan
a este dispositivo.
Nota GUARDE ESTAS INSTRUCCIONES
Nota Esta documentación está pensada
para ser utilizada con la guía de instalación del producto que lo
acompaña. Si necesita más detalles, consulte la Guía de
instalación, la Guía de configuración o cualquier documentación
adicional adjunta.
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Varning!
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VIKTIGA SÄKERHETSANVISNINGAR
Denna varningssignal 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 vanliga förfaranden för att förebygga
olyckor. Se översättningarna av de varningsmeddelanden som finns i
denna publikation, och se de översatta säkerhetsvarningarna som
medföljer denna anordning.
OBS! SPARA DESSA ANVISNINGAR
OBS! Denna dokumentation ska användas i
samband med den specifika produktinstallationshandbok som medföljde
produkten. Se installationshandboken, konfigurationshandboken eller
annan bifogad ytterligare dokumentation för närmare detaljer.
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Features
The Catalyst 6500 series 8-port T1/E1 PSTN
interface module is a high-density, 8-port, T1/E1 Voice over IP
(VoIP) module that can support digital T1/E1 connectivity to the
Public Switched Telephone Network (PSTN) or transcoding and
conferencing. Each configured port requires an IP address, is
registered with Cisco CallManager, and is managed by Cisco
CallManager.
The module software is downloaded from a TFTP
server. Depending upon which software you download, the ports can
serve as T1/E1 interfaces or support transcoding and conferencing.
Features unique to the 8-port PSTN interface
module are listed in Table 1. Fax and modem
transport parameters are listed in Table 2.
Features that the 8-port PSTN interface module shares with other
Catalyst 6500 series modules are described in these sections:
•Hot Swapping
•Power Management
•Environmental Monitoring
Table 1 8-Port T1/E1 PSTN Interface Module
Features
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Digital Signal Processing Per T1/E1
Port
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G.711 to G.723 and G.729a transcoding
(maximum of 8 x 32 channels of transcoding)
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Conference bridging, meet-me, and ad-hoc
conference modes (maximum of 8 x 16 channels of conferencing
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Comfort noise generation
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Silence suppression, voice activity detection
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Fax pass-through
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Line echo cancellation
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Common Channel Signaling (CCS)
•For T1: 23 DS0 channels for voice traffic; 24th
channel is used for signaling
•For E1: 29 DS0 channels for voice traffic; 16th
channel is reserved for signaling
Any channel can be configured for CCS
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ISDN Primary Rate Interface (PRI) signaling:
Each interface supports 23 channels for T1 and 30 channels for E1.
The default mode is for the 24th T1 channel or 16th E1 channel to
be reserved for signaling. Both network side and user side
operation modes are supported.
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Channel-associated signaling (CAS)
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Digital Signaling Per T1/E1 Port
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T1 binary 8-zero substitution/alternate mark
inversion (B8ZS/AMI) line coding, u-law or a-law coding.
E1 HDB3 line coding.
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T1 line bit rate: 1.544 Mbps
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E1 line bit rate: 2.048 Mbps
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Framing format: D4 superframe and extended
superframe
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Link Management
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Facilities Data Link (FDL) is a link
management protocol used to help diagnose problems and gather
statistics on T1 lines.
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Table 2 Fax and Modem Transport Parameters
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Parameter Name
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Description
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Default
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Fax pass-through
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Allows fax and modem signals to be
transported over a voice channel through a packet network with
encoding appropriate for fax or modem signals.
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Disabled
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Fax relay enable
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Enables/disables fax relay support in the
gateway. Enabling this parameter will result in the gateway
attempting fax relay negotiation as part of the call setup. If it
is enabled but the far end does not support fax relay, the fax call
will switch to pass-through mode.
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Checkbox checked
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Fax error correction mode (ECM) override
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ECM is a feature present in some higher-end
fax models that enables fax pages to be transmitted error free. If
ECM is enabled, the transmission has a low tolerance to jitter and
packet loss. This results in a higher number of failed fax calls.
For better reliability (even with higher packet loss), ECM needs to
be disabled. ECM is disabled by enabling the checkbox.
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Checkbox checked
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Maximum fax rate
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Defines the maximum fax transmission rate to
be used during the fax call. This can be used to restrict the
bandwidth utilized for fax transmission.
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14400
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Fax payload size
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Configures the size of the fax payload (fax
data) carried over real-time transport protocol (RTP). The value
can range between 20 and 48.
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20
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Nonstandard facilities country code
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Overrides the country code passed by the fax
machine with the value defined. Setting the value to default
(65535) results in the gateway passing the country code values
received from the fax machine to the far end. If the value is not
the default, then the gateway will pass the configured value as the
country code to the far end. It will suppress the actual country
code passed by the Fax machine. Country code can be received by the
gateway from the far end through ISDN. For details about the
nonstandard facilities country code, refer to the T.35
specification.
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65535
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Nonstandard facilities vendor code
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Overrides the vendor/provider code passed by
the fax machine with the value defined. Setting the value to
default (65535) results in the gateway passing the vendor code
values received from the fax machine to the far end. If the value
is not the default, the gateway passes the configured value as the
vendor code to the far end. It will suppress the actual vendor code
passed by the fax machine. The vendor code can be received by the
gateway from the far end through ISDN. For details about the
nonstandard facilities vendor code, refer to the T.35
specification.
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65535
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Fax/Modem Packet Redundancy
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Enables packet redundancy support for fax and
modem calls. Packet redundancy support results in retransmission of
packets in case of problems. Enabling redundancy can have a
negative impact on the performance.
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Checkbox unchecked
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V.21 Flag Sequence Detection Count
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Specifies the number of V.21 flag sequences
that need to be detected in order to determine if an incoming fax
tone is valid. Increase this value when there are line disturbances
that require the gateway to wait for a longer period of time to
confirm a fax call.
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4
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Initial Playout Delay
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Sets up the initial voice playout delay
parameters. The values defined have an impact on the size of the
jitter buffer used. Modify this parameter if there are issues
related to voice quality (robotic voice, for example).
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40
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Minimum Playout Delay
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Sets up the minimum voice playout delay
parameters. The values defined have an impact on the size of the
jitter buffer used. Modify this parameter if there are issues
related to voice quality (robotic voice, for example).
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20
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Maximum Playout Delay
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Sets up the maximum voice playout delay
parameters. The values defined have an impact on the size of the
jitter buffer used. Modify this parameter if there are issues
related to voice quality (robotic voice, for example).
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150
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Named service event (NSE) type
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NSE type attempts to standardize the transfer
of tones over real-time transport protocol (RTP). Two NSE standards
exist in Cisco products: one for Cisco IOS gateways and one for
non-Cisco IOS gateways. The Catalyst 6500 series switch 8-port
T1/E1 PSTN interface module supports both standards. You need to
configure the right NSE type based on the network setup. If the
module needs to talk to a Cisco IOS gateway (a VG200 or AS5300 for
example), set this option to IOS Gateway. If the gateways need to
talk to other non-Cisco IOS gateways (such as a WS-X6624-FXS,
VG248, or another WS-X6608-E1/WS-X6608-T1),
set this option to non-IOS Gateway.
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Non-IOS Gateway
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Note To configure the 8-port T1/E1 PSTN interfaces, refer
to the "Configuring a Voice-over-IP Network" section of the
Catalyst 6500 Series Software Configuration Guide.
To configure the interfaces to work with Cisco CallManager, refer
to the most
current version of the Call Manager administration guide.
Hot Swapping
Hot swapping lets you remove and replace the
8-port PSTN interface module while the system is operating. When
the system detects that a module has been installed or removed, it
automatically runs diagnostic and discovery routines, acknowledges
the presence or absence of the module, and resumes system operation
without any user intervention.
Power Management
Because the Catalyst 6500 series modules have
different power requirements, certain switch configurations require
more power than a single power supply can provide. Although the
power management feature allows you to power all installed modules
with two power supplies, redundancy is not supported in this
configuration.
For detailed information on power management,
refer to the Catalyst
6500 Series Switch Software Configuration Guide.
Environmental Monitoring
Environmental monitoring of chassis
components provides early warning indications of possible component
failure to ensure safe and reliable system operation and avoid
network interruptions.
For detailed information on environmental
monitoring, refer to the Catalyst
6500 Series Switch Software Configuration Guide.
Front Panel Description
The 8-port PSTN interface module front panel
features (see Figure 1) are described in the
following sections.
Figure 1 8-Port PSTN Interface Module
Status LED
When the 8-port PSTN interface module powers
up, it initializes various hardware components and communicates
with the supervisor engine. The STATUS LED on the module is
described in Table 3. For detailed
information on the supervisor engine LEDs, refer to the
Catalyst 6500 Series Switch Module Installation Guide.
Table 3 8-Port PSTN Interface Module
Status LED
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Color
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Description
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Off
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The module is not receiving power. The module
was powered down due to lack of power (the module is listed as
power-deny
in the show
module status field)
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Red
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The module is resetting (the switch has just
been powered on or the module has been hot inserted)
|
| |
The module processor detected a fatal error
during its diagnostics
|
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Overtemperature condition (major threshold
exceeded)
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Orange
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The module is booting or running diagnostics
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The supervisor engine has disabled the module
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Overtemperature condition (minor threshold
exceeded)
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Green
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The module is operational
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Link LEDs
The Link LEDs show port and link status for
each of the eight ports as described in Table
4.
Table 4 8-Port PSTN Interface Module Link
LEDs
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Color
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Description
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Green
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The link is OK.
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Red
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No carrier is detected or an AIS signal is
received.
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Yellow
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The frame sync is lost or an RAI signal is
received.
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Flashing yellow
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The span is in loopback.
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Off
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The registration with Cisco CallManager is
lost.
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RJ-48 Connector
The RJ-48c connector on the module front
panel allows you to attach the Catalyst 6500 series switch to PBX
and PSTN T1/E1 interfaces (see Figure 2).
Figure 2 RJ-45 and RJ-48c Interface Cable
Connectors
.
Note The terms RJ-45
connector and RJ-48c
connector are sometimes used interchangeably. The RJ-48c is
the jack or receptacle; the RJ-45 is the plug.
Specifications
The 8-port PSTN interface module
specifications are listed inTable 5.
Table 5
8-Port PSTN Interface Module Specifications
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Specifications
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Description
|
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Environmental Conditions
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|
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Operating Temperature
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32° to 104°F (0° to
40°C)
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Nonoperating Temperature
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-40° to 167°F (-40° to 75°C)
|
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Humidity
|
10 to 90%, noncondensing
|
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Dimensions (H x W x D)
|
1.2 x 14.4 x 16 in. (30 x 356 x 406 mm)
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Weight
|
Approximately 3 lb (1.36 kg)
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Line bit rate
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T1: 1.544 Mbps
E1: 2.048 Mbps
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Line code
|
T1: AMI/B8ZS
E1: HDB3
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Input level
|
+1 dB to -24 dB
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Output level
|
0, -7.5, or -15 dB
|
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Software requirements
|
Catalyst 6500 series supervisor engine
software release 5.5 or later
|
| |
Cisco CallManager software release 3.0 or
later
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Installing the 8-Port E1/T1 PSTN Interface
Module
Slot 1 on the Catalyst 6500 series switch is
reserved for the supervisor engine (see Figure
3). If you are using a redundant supervisor engine, it would go
in slot 2; otherwise, slot 2 can be used for other modules. The
8-port PSTN interface module can be installed in any of the other
slots.
Figure 3 Catalyst 6005/6505 Switch Chassis
Warning Only trained and qualified personnel should be allowed
to install, replace, or service this equipment.
The section is divided into the following
topics.
•Required Tools
•Removing the 8-Port E1/T1 PSTN
Interface Module
•Installing the 8-Port PSTN
Interface Module
Required Tools
These tools are required to install the
8-Port E1/T1 PSTN interface module in the Catalyst 6500 series
switches:
•Number 1 and number 2 Phillips screwdrivers for the
captive installation screws
•Antistatic mat or antistatic foam
•Wrist strap or other grounding device
Removing the 8-Port E1/T1 PSTN Interface
Module
Caution During this procedure, wear grounding wrist straps to
avoid ESD damage to the module. Do not directly touch the backplane
with your hand or any metal tool, or you could shock yourself.
Caution To prevent ESD damage, handle the module by the
carrier edges only.
To remove the module from a Catalyst 6500
series switch, perform these steps:
Step 1 Disconnect any network interface cables attached to
the ports on the module you intend to remove.
Step 2 Loosen the captive installation screws, as shown in
Figure 4.
Figure 4 Ejector Levers and Captive
Installation Screws
Step 3 Grasp the left and right ejector levers and
simultaneously pivot the levers outward to release the module from
the backplane connector. Figure 4 shows a
close-up of the right ejector lever.
Step 4 Grasp the module front panel with one hand and place
your other hand under the carrier to support and guide it out of
the slot. Do not touch the printed circuit boards or connector
pins.
Step 5 Carefully pull the module straight out of the slot,
keeping your other hand under the carrier to guide it.
Step 6 Place the module on an antistatic mat or antistatic
foam, or immediately install it in another slot.
Step 7 If the slot is to remain empty, install a module
filler plate (part number 800-00292-01) to keep dust out of the
chassis, to maintain proper airflow through the module compartment,
and to prevent exposure to hazardous voltages and current.
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.
Caution Before connecting system power or turning on the
switch, ensure that the system is connected to a supplementary
ground. For complete instructions on connecting the supplementary
ground, refer to the
Catalyst
6500 Series Switch Installation Guide.
Installing the 8-Port PSTN Interface Module
Follow these steps to install the 8-port PSTN
interface module:
Step 1 Connect an ASCII terminal or a PC running terminal
emulation software to the console port on the supervisor engine.
Step 2 Choose a slot for the new PSTN interface module.
Ensure that you have enough clearance to accommodate any interface
equipment that you will connect directly to the module ports. If
possible, place modules between empty slots that contain only
switching-module filler plates.
Step 3 Remove the module from its antistatic packaging.
Step 4 Guide the module into the slot, aligning the sides of
the module with the guides in the slot (see Figure 5). Avoid touching the components on the
board.
Figure 5 Installing the 8-Port PSTN
Interface Module in the Chassis
Step 5 While keeping the module oriented horizontally,
carefully slide it into the slot until its front panel contacts the
ejector levers (see Figure 4).
Step 6 Using the thumb and forefinger of each hand,
simultaneously push the left lever and the right lever in to seat
the module all the way into the backplane connector.
Caution Always use the ejector levers when installing or
removing modules. A module that is partially seated in the
backplane causes the system to halt.
Step 7 Use a screwdriver to tighten the captive installation
screws on the left and right sides of the module (see Figure 4).
Step 8 Check the status of the module as follows:
a. After the module has booted and run diagnostics,
ensure that the Status LED on the module is green (module
operational).
b. Enter the show
module command at the Cat6500> prompt to verify that the
system acknowledges the new module and reports it as ok in the
screen display.
Connecting a Cable to the 8-Port PSTN
Interface Module Port
Use a standard RJ-45 plug and Category 5
cable to connect to the RJ-48c module connector. A RJ-45 connector
is shown in Figure 6.
Warning To reduce the risk of fire, use only No. 26 AWG or
larger telecommunication line cord.
Figure 6 RJ-45 and RJ-48c Interface Cable
Connectors
Note The terms RJ-45
connector and RJ-48c
connector are sometimes used interchangeably. The RJ-48c is
the jack or receptacle; the RJ-45 is the plug.
What to Do After Installing the 8-Port T1/E1
PSTN Interface Module
After you have installed the 8-port T1/E1
PSTN interface module, refer to the Catalyst
6500 Series Switch Software Configuration Guide for complete
configuration details. Note that all signaling configuration is
done through Cisco CallManager; refer to the applicable Cisco
CallManager documentation.
Obtaining Documentation and Submitting a
Service Request
For information on obtaining documentation,
submitting a service request, and gathering additional information,
see the monthly What's New in Cisco Product Documentation, which
also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What's New in Cisco Product Documentation as a
Really Simple Syndication (RSS) feed and set content to be
delivered directly to your desktop using a reader application. The
RSS feeds are a free service and Cisco currently supports RSS
Version 2.0.
This document is to be used in
conjunction with the Catalyst 6500 Series Switch Module Installation Guide.
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Installing the 8-Port E1/T1 PSTN
Interface Module 
