General Information

Serial #

N/A

Part Number

1

Total Parts

4

AKA

Central control complex

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

107.0 cm

Width

72.0 cm

Height

185.0 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

"Central control complex" 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

Manages the entire system, specifically the DMS-100 digital telephone switching system, by routing the messaging control information to the appropriate network elements.

Technical

This unit contains the central processor unit (CPU), memory, disk and tape drives that together manage the entire system (the operating system is stored on the disk drive). Like the network, the central control complex is fully redundant, with two CPU's, two memories, and two tape and disk drives. Input to and from this module is via video display units, a printer, and the disk and tape drives. (ref. 1)

Area Notes

Unknown

Details

Markings

All controls, components, etc. labelled; most also bear bar coded decals. "NT9X95BA/ REL 01" and NT9X01JB/ REL 07" printed inside cabinet, on base. Text panel on outside of left door reads "Supernode/ Description/ [graphic]/ Supernode is the control center of the DMS switch. It's function is to control the network(s) by routing/ the messaging control information to the appropriate/ network elements./ It can be divided in 3 groups: the Computing Module/ (CM), the Software Load Module/ (SLM) and the Message Switch (MS)./ Each one of these groups are duplicated in the same frame to provide high reliability and minimize service/ interruption. The estimated down time is 2hours [sic] over/ a period of 40 years." Text panel on inside of right door reads "Circuit Pack Replacement/ Supernode/ MS0/ MS1/ CMO CM1/ SLM0 SLM1/ To replace the following circuit packs; you MUST power down./ NT 9X4/ NT 9X52/ NT 9X53/ NT 9X54/ NT 9X23/ MS POWER DOWN PROCEDURE/ Power from converter in slot 4 (+5v)/ Power down converter in slot 33, 36 at the same time./ MS POWER UP PROCEDURE/ Power up converter in slot 33, 36 at the same time/ Power up converter in slot 1 (-5v)/ Power up converter in slot 4 (+5v)/ NOTE: To power down or up the CM or EXT of CM; both power/ converter[sic] are/ activated or deactivated at the same time./ At all time[sic] when replacing circuit packs, wear a static wrist strap."

Missing

Unknown.

Finish

Metal cobinet frame and access doors have grey enamel painted finish. Metal and synthetic modular components inside are predominantly brown, with green trim and labeling. Grey synthetic covering on cables. White paper panels bearing black text fastened to outside of left door, and inside of right door on both sides of cabinet.

Decoration

N/A