Introduction; Concatenation Options; Oc-12C/Stm-4C Options - Wavetek ANT-20 Operating Manual

ANT-20/ANT-20E

Introduction

1

Concatenation options

1.1

OC-12c/STM-4c options

Modern bandwidth capacity requirements (e.g. Internet) have led to the setting up of networks
with transmission capacities of up to 600 Mbit/s. These networks use concatenated containers
from the SDH and SONET signal structures. The two methods of concatenation used are known
as contiguous concatenation and virtual concatenation. One of the main applications for
OC-12c or STM-4c signals is ATM. More and more OC-12c or STM-4c interfaces are being
used in ATM exchange switches.
The "OC-12c/STM-4c" options for the ANT-20 allow you to test backbones, single connections
or network elements. The options extend the main applications and instruments of the ANT-20
to cover these signal structures.
The following options are available:
• OC-12c/STM-4c ERROR TEST (BULK) (BN 3035/90.90)
• OC-12c/STM-4c ATM TESTING (BN 3035/90.91)
• OC-12v/STM-4v VIRTUAL CONCATENATION (BN 3035/90.92)
The "OC-12c/STM-4c ERROR TEST (BULK)" option can be used to test the performance of
transmission paths. All of the ANT-20 analyzers can be used at the same time. Overhead
Analyzer, Pointer Analyzer, Anomaly/Defect Analyzer, Jitter Analyzer and Performance
Analysis allow correlation of the measurement results.
The "OC-12c/STM-4c ATM TESTING" option extends the applications of the ATM Module,
BN 3035/90.70.
These two options are used to test the paths and network elements used for contiguous
concatenation.
The "OC-12v/STM-4v VIRTUAL CONCATENATION" option extends the ANT-20 to cover this
multiplexing and transmission method, which can be used by telecoms service providers to
transmit concatenated VC-4 containers over existing SDH networks.
Introduction
Concatenation Options
I-1