Embed Size (px)
Citation preview
LA CERTIFICACION EN EL CABLEADO
ESTRUCTURADO DE cobre
Alvaro Cayo Urrutia
Lima-Perú
Niveles de Comprobación en Campo
Niveles de Comprobación en Campo (Cont.)
“Certificación”
Estándares de Cableado en el Mundo
Tipos de Estándares
Use the least expensive cable that meets your performance expectations…
Certification is for the Field not the Lab
How to Read Test Results
Propagation Delay
www.networks.pe
Electrons travel at approx. constant speed
( 20 cm or 8” per ns,
1 ns = 0.000 000 0001 s
NVP * speed of light)
Propagation delay
(max 555 ns later ..)
Traveling signals is like electrons following a somewhat rocky path
Insertion Loss on Test Report
www.networks.pe
Atenuación
(Perdida de inserción) Menos electrones!
Calor! Calor!
Existen baches en el camino….
NEXT on Test Results
www.networks.pe
Crosstalk!!
A level problem in the electronic road will cause some electrons to fall on an adjacent road
On top of that: the road is not level and electrons fly off!
www.networks.pe
Near End Crosstalk is by the electrons that return back to the beginning
Near End Crosstalk (NEXT)
www.networks.pe
Far End Crosstalk is by the electrons that continue to the far end
Far end crosstalk (FEXT)
www.networks.pe
At a receiver input you need more signal electrons than stray electrons
Combine two effects: attenuation and NEXT: S/N = ACR
Look here!
Poor ACR (and NEXT problems)can lead to FCS and CRC errors and – Retransmissions!
FCS/ACR Errors Lead to Slow NetworksBelow is a an example of a typical TCP conversation
Bad Cabling = Slow Network
Antiguos Parámetros de Comprobación en Campo: TSB-67
La Categoría 5 Parámetros de Test
El “Nuevo” Modelo de Transmisión
Transmisión por Par Múltiple
Power Sum ELFEXT
Transmisión Full Duplex
Parámetros de Test Categoría 5e/6
Comparación de Rendimiento
Un “Enlace de Cableado” Instalado
La Medida de Canal
La Medida de Enlace Permanente
¿Por qué el “Enlace Permanente”?
Características Fundamentales de NEXT y Pérdida de Retorno
Medida NEXT del PL
Pérdida de Retorno – Un Reto Mayor de Test
Pérdida de Retorno – Requisitos del Adaptador
Solución de Problemas con el DTX
Defectos NEXT y NEXT
Ventajas de los Diagnósticos NEXT
Solución de Problemas NEXT con el DTX
RL y Defectos RL
Ventajas de los Diagnósticos RL
Solución de Problemas RL con el DTX
Analizando las interferencias de Alien CrossTalk
Why to test for Alien Next?
When to Test for Alien Cross Talk
Alien NEXT Test Results
Alien NEXT
Cat 6a shielded and unshielded
ANEXT – Picking Disturbed and Disturbing cables
Selecting a disturbed/victim cable
Selecting the disturbers (cables to energize)
Selecting the disturbers (cables to energize)
All the Cables in the Bundle are Disturbers – keep those bundles small
ANEXT and AFEXT Along the Length of the Links
ANEXT and AFEXT For Varying Link Lengths
How to test Class F and Class FA
First Select Your Test Limit
Selecting the Test Limit
Use the correct adapters for Class FaCat 7 patch cords/Permanent Link Adapters
Class FA FIELD testing
Here we see +/- 2.75 dB @600MHz
(Level IV accuracy @1000MHz is >+/-5dB)
How to Read Test Results – Class F
How to Read Test Results – Class F
LinkWare 7
WHAT’S NEW IN LINKWARE 7.X?
Linkware stats now included
Optifiber pro support
Verifies Software of tester
Verifies calibration of dtx
Re-certify DTX fiber loss results
Sort on margin or loss
NEW OTDR Report format
New zoom feature on graphs
tabs
Supports 40G & 100G fiber
Larger files handled much more gracefully
Larger files handled much more gracefully
A few testers missing from linkware 7.x
Acrobat writer built in
Our competition spends little effort here
What is new in Copper
Cat 5e, Cat 6, Cat 6A?
What is coming
What about Cat 7??
Thank you for your time
Q&A
