Renseignements généraux

Nº de série

S/O

Nº de partie

4

Nombre total de parties

7

Ou

S/O

Brevets

S/O

Description générale

SYNTHETIC & METAL COMPONETS

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

7,1 cm

Largeur

3,8 cm

Hauteur

2,8 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Technologie informatique

Catégorie

Périphériques numériques

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Inconnu

État/province

Inconnu

Période

THIS EXAMPLE NEVER USED.

Canada

1-MEG MODEM DESIGNED TO MEET GROWING DEMAND FOR "HIGH-SPEED" ACCESS TO INTERNET BY RESIDENTIAL & SMALL-BUSINESS CUSTOMERS OF TELEPHONE COMPANIES. SPEEDS OFFERED BY ADSL SERVICE (1.28 MBPS DOWNSTREAM/320 KBPS UPSTREAM) WERE FAR HIGHER THAN THE FASTEST ANALOGUE DIAL-UP MODEM (56 KBPS) AND RIVALLED THOSE OF CABLE MODEMS BY COMPETING CABLE TELEVISIONS COMPANIES. THE NORTEL 1-MEG MODEM WAS THE FIRST EASILY DEPLOYED, RELIABLE DSL MODEM FOR RESIDENTIAL AND SMALL BUSINESS USE AND WAS INTENDED FOR "DO-IT-YOURSELF" INSTALLATION. IN AN ATTEMPT TO ACHIEVE PROFITABILITY BY DISCONTINUING LOW MARGIN PRODUCT LINES, NORTEL CEASED PRODUCTION OF THE 1-MEG MODEM AND OTHER NETWORK ACCESS PRODUCTS IN 2002. (REF. 1).

Fonction

TO CONVERT DIGITAL OUTPUT FROM A COMPUTER INTO A MODULATED, BROADBAND ELECTRICAL SIGNAL FOR TRANSMISSION OVER A STANDARD TELEPHONE LINE. CONVERT THIS MODULATED, BROADBAND ELECTRICAL SIGNAL FROM AN INCOMING TELEPHONE LINE INTO DIGITAL INPUT TO COMPUTER.

Technique

FIRST DEV'D IN USA IN 1989, ASYMMETRIC DIGITAL SUBSCRIBER LINE (ADSL) TECHNOLOGY PROVIDES HIGH SPEED ACCESS TO DIGITAL NETWORKS FOR PERSONAL COMPUTER USERS OVER STANDARD PAIR OF TELEPHONE WIRES WHILE ALLOWING SIMULTANEOUS VOICE TELEPHONE SERVICE. IT DOES THIS BY CREATING 3 FREQUENCY BANDS BETWEEN 0- APPROX. 1.1 MHZ FOR VOICE, UPSTREAM DATA, AND DOWNSTREAM DATA. MODULATION IS BY QUADRATURE AMPLITUDE MODULATION (QAM). BECAUSE THIS SYSTEM ALLOWS HIGHER RATES FOR DOWNSTREAM DATA THAN UPSTREAM DATA IT IS SAID TO BE AYSMMETRICAL (REF.1).

Notes sur la région

Inconnu

Détails

Marques

Decal applied to underside of casing reads "NORTEL/ NORTHERN TELECOM/ NTEX39AA/ COMPLIES WITH PART 68, FCC RULES/ FCC REGISTRATION: AB6CAN-24974-KX-N/ USOC: RJ11 REN: 0.0B/ LISTED/ [Underwriters Laboratories symbol]/ 59Y7/ Communication/ Circuit/ Accessory/ [Canadian Standards Association symbol]®/ MADE IN/ CANADA/ BB PO871742". Individual decals applied over the above read "RO2 990128", "[Canada wordmark symbol] Industry Canada/ Industrie Canada/ 332 8569 A" & "BT09933FV". Graphic symbols for "telephone" & "jack" connections appear on casing top.

Manque

S/O

Fini

GREY MOULDED SYNTHETIC CASING HAS FINELY WRINKLE-TEXTURED FINISH ON MOST SURFACES, SAVE RECESSED PANELS ON TOP & UNDERSIDE

Décoration

S/O