Maestro

Maximize the potential of PSTN network

The Maestro system, replacing the well known system Mirabel (precursor of maintenance systems PSTN), was designed to perform physical tests telephone lines and provide a simple diagnostic and localization of defects as well as qualifying these lines to support xDSL services. These tests can be launched by:

  • field technicians in charge of maintenance,
  • customer support in 7/24,
  • analysts in charge of preventive maintenance (by batch of test to analyse status of cables by example),
  • analysts in charge of marketing to promote/propose services only where they can be available (eligibility).

The system can easily:

  • be integrated inside IS to be able to:
    • get information regarding telephone lines in databases,
    • offer NBI to allow tests submission or retreive historic measurements,
  • use different exchanges (E10, EWSD...), DSLAM or MSAN.

The know-how of Vierling R&D teams during these last 25 years, has created:

  • an equipment to perform quickly, thousands of measurements per copper pair
  • a complex software and algorithms to:
    • generate a reliable diagnostic based on these measurements,
    • automatically detect elements on line (splitters, NID, phone sets, xDSL modems...).

Recently, Vierling Communication decides to offer all its know-how in this domain inside a portable solution which contains the same harware and clever algorithms as the Maestro system.

This equipment helps field technicians to do campaign measurements:

  • create eligibility database and help marketing to provide right services to right clients,
  • validate MSAN deployment before commissioning,
  • test unused pairs and provide a status for the whole cable.

Maestro system architecture and its integration inside IS

Principles - Sequence of a test

  • A test is launched by providing the sole phone number of the line (by example).
  • The server interrogates databases to identify on witch commutator (switch, DSLAM, matrix...) this line is related to.
  • The server pilotes the MTA (Metallic Test Access) function of the commutator to be able to establish a metallic link between the line and a test port of a MTDU.
  • The server identifies on which MTDU, the line has been returned.
  • MTDU performs all necessary measurements to establish a comprehensive diagnostic.
  • The server pilotes the MTA function of the commutator to release the line.
  • The server stores and displays value results and diagnostic to user.


ADMIN Station - Configuration management

Tests Web Application

After authentication and regarding the profile of the user:

  • On-demand tests
    • Run a line test and display results
    • Eligibility
    • MIB DSLAM Information
    • Internal information from commutator
    • Combined test (line + MIB)
    • Test xDSL plot and services
    • Historical results
  • Bulk tests
    • Lines selection according various criteria
    • Automatic (newly created lines, faulty lines…)
    • Periodically
    • Export results to backoffice treatments

Measurements and diagnostics provided by MTDU

Maintenance measurements

  • DC voltages: A/B, A/G and B/G
  • AC voltages: A/B, A/G, B/G, A/Bat. and B/Bat.
  • Resistances: A/B, A/G and B/G
  • Capacitances: A/B, A/G, B/G and EFF
  • DC currents: A/B, A/G and B/G
  • AC currents: A/B, A/G and B/G
  • Noise in vocal and xDSL bands
  • Fault location

xDSL eligibility measurements

  • TDR
  • Line Attenuation at 150kHz, 300kHz and 1MHz
  • Upstream and downstream ADSL and ADSL2+ rates

Line elements detected

  • Phone set, Fax, Modem (on/off)
  • RC socket, C socket or other NID
  • CO xDSL splitter
  • xDSL modem and/or splitter in client premise
  • Current limiter

Diagnostics

  • Line Good in Test
  • Open 1 wire (A or B wire)
  • Open 2 wires
  • Unbalanced line
  • Insulation fault Ground (A or B wire)
  • Insulation fault between wires
  • Insulation fault between a wire and battery (A or B)
  • Multiple insulation faults
  • DC voltage presence (A or B wire)
  • DC voltage presence (between wires)
  • AC voltage presence (A or B wire)
  • AC voltage presence (between wires)
  • HR joint (A or B wire)
  • LF noise presence (voice band)
  • HF noise presence (xDSL band)
  • Balance fault in xDSL band