General Information

Serial #

N/A

Part Number

1

Total Parts

6

AKA

LCE

Patents

N/A

General Description

Metal and synthetic components.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

66.0 cm

Width

52.0 cm

Height

215.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Telephony

Sub-Category

N/A

Manufacturer

AKA

Nortel

Country

Canada

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

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)

Function

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.

Technical

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)

Area Notes

Unknown

Details

Markings

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.

Missing

Unknown.

Finish

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

Decoration

N/A