Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

6

Ou

LCE

Brevets

S/O

Description générale

Metal and synthetic components.

Dimensions

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

Longueur

66,0 cm

Largeur

52,0 cm

Hauteur

215,0 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Communications

Catégorie

Téléphonie

Sous-catégorie

S/O

Fabricant

Ou

Nortel

Pays

Canada

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

Used c. 1990 +

Canada

'Line Concentrating Equipment' (LCE) is one functional module of DMS-100 switch[ing system], designed and made in Canada. When Northern Telecom announced its DMS product line in 1976, it was the first telecommunication equipment manufacturer in the world to offer a complete line of digital telephone switches. As a product it has been extremely successful for Nortel and ongoing sales and service contracts provide a significant, and stable, portion of Nortel's revenue. (ref. 1)

Fonction

To convert incoming analogue signals to digital format, and relay them to a concentrator. Also provides signalling and other [telephone] call management functions within telephone switching system.

Technique

DMS-100 digital telephone switching system featured an economical codec chip that performed all the analogue-digital-analogue conversions for the interface between the analogue subscriber line and the digital switching system. By combining a large number of discrete devices onto a chip that were previously on a card, the cost and size of lines cards was reduced and reliability increased. This allowed each subscriber line to be assigned it's own card, which made upgrades of individual subscriber's services possible without disrupting service to others. DMS-100's modular design allowed ready upgrading of software and hardware without the need to perform fundamental redesigns. This meant large and small central office switches, toll and overseas switches, even private branch exchanges could all be built using the same kit of hardware and software parts. All this made DMS switches economical, reliable, and relatively easy to service. (ref. 1)

Notes sur la région

Inconnu

Détails

Marques

Components, controls, etc. labelled. Most components bear bar-coded labels. Dominant markings on unit include "EE 07/ LCE: 007" on top, front; "NT 6X03AA RIF", "MADE IN CANADA", and "LCE 007" printed on lower edge of rack, below cable bundles.

Manque

Unknown.

Fini

Rack and components have dark-brown enamel painted finish; grey synthetic covering on cables/wires.

Décoration

S/O