Various units of OCB 283 system are connected over token

(8) Operation & Maintenance Unit (Smm): Smm Station In Ocb 283 Performs The Operation And Maintenance Functions. The Smm Station Has Full Duplicated Hardware Smma And Smmb. One Of The Two Smm Is Pilot And The Other Work As Hot StandBy. For Both Smm There Are Two Mirror Images Hard Disks Of 1200 Mb Capacity. Pilot Smm Is Able To Access Either Of Disks. There Are Termination Of Peripherals Tty, Vdu For Operation And Maintenance. Smm Dialogues With All Smcs Over Mis Token Ring. Adjacent To Smm Rack There Is One Magtape Drive Unit Dbm. There Is One Streamer For Cartridge Drive In Smm Rack. There Are Up To 4 Alarm Reception Rings For Handling Exchange Alarms. Smm Receives All Alarms From Whole Exchange On Alarm Rings Mal. Smm Station Occupies Three Shelves Of A Ca Rack. Smm Rack Also Has Digital Voice Announcement System Mpna In Fourth Shelf. The Smm Station Supports The Local Operational Maintenance Unit Om Handling Ocb 283 Supervision And Management Function. This Smm Is Provided To Supervise The Functioning Of Various Exchange Equipment And To Take Suitable Action In Case Of Malfunctioning Of Any Equipment. As Stated Earlier It Does The Defense Of Control Units In Case Of Faults. All The Files And Data Are Stored In Smm Hard Disk, Which Can Be Loaded In Any Unit. Smm Also Carries Out The Re-Initialization Of The Exchange When Required. The Smm Process Man Machines Commands And Execute Them. Smm Also Collects The Alarms From Various Units And Process Them. Smm Stores Detailed Billing Data In The Disk, Which Can

? O&M of the MSC Alcatel OCB 283, OCB HC3.1 & OCB HC3.3 (GSM)

ALCATEL OCB 283 SPARE PARTS ACCSG ACAJA5 ACAJB5 RCHIS TSTRS ACFTD STREAMERS wanted 100314c0618

Ocb 283- General Description-bsnl Training

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what is meant by ocb 283 telephone exchange? | Yahoo Answers

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The OCB 283 / CSN exchange in technical collaboration with Alcatel is manufactured in this Plant.
Call Processing In Ocb283

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STATIONS IN AN OCB 283
Hardware unit consisting of a number of processors and couplers connected to a common bus BSM (multiprocessor station bus) various stations in OCB 283: SMC SMA SMT SMM STS These stations communicate among themselves on a token ring called MIS (Inter Station Multiplex)

Call Processing In Ocb283

BLOEMFONTEIN OCB 283 (OBFN) Exchange information

(8) Operation & Maintenance Unit (Smm): Smm Station In Ocb 283 Performs The Operation And Maintenance Functions. The Smm Station Has Full Duplicated Hardware Smma And Smmb. One Of The Two Smm Is Pilot And The Other Work As Hot StandBy. For Both Smm There Are Two Mirror Images Hard Disks Of 1200 Mb Capacity. Pilot Smm Is Able To Access Either Of Disks. There Are Termination Of Peripherals Tty, Vdu For Operation And Maintenance. Smm Dialogues With All Smcs Over Mis Token Ring. Adjacent To Smm Rack There Is One Magtape Drive Unit Dbm. There Is One Streamer For Cartridge Drive In Smm Rack. There Are Up To 4 Alarm Reception Rings For Handling Exchange Alarms. Smm Receives All Alarms From Whole Exchange On Alarm Rings Mal. Smm Station Occupies Three Shelves Of A Ca Rack. Smm Rack Also Has Digital Voice Announcement System Mpna In Fourth Shelf. The Smm Station Supports The Local Operational Maintenance Unit Om Handling Ocb 283 Supervision And Management Function. This Smm Is Provided To Supervise The Functioning Of Various Exchange Equipment And To Take Suitable Action In Case Of Malfunctioning Of Any Equipment. As Stated Earlier It Does The Defense Of Control Units In Case Of Faults. All The Files And Data Are Stored In Smm Hard Disk, Which Can Be Loaded In Any Unit. Smm Also Carries Out The Re-Initialization Of The Exchange

Ocb 283 Functional Diagram

BLOEMFONTEIN OCB 283 (OBFN05) Exchange information

Hardware Configuration Ocb 283 Exchange Comprises Following Hardware Units: 1. Subscriber Access Units (Csnl, Csnd, Csed). 2. Trunk And Junction Connection Units (Smt). 3. Switching Matrix (Smx). 4. Auxiliary Equipments (Sma). 5. Control Units (Smc). 6. Communication Multiplex. 7. Time Base Generator (Sts) 8. Operation And Maintenance Unit (Smm). The Subscriber Connection Units Csn, Smts And Smas Are Connected To Switching Network Through Pcm Links. The Interchange Of Message Between Smt, Smx, Smas And Control Units Smcs Takes Place On ‘Mas’ Token Rings. The Control Unit Interchanges Messages With One Another And With Smm On ‘Mis’ Token Rings. The Smm Is The Operation And Maintenance Functional Unit And Is Duplicated As Smma And Smmb. These Are Work In Pilot/ Standby Mode. The Smcs Are The Units, Which Hold Control Functions Mr, Tx, Tr, Mq, Pc, Gx. These Functional Units Are In Software Form And Are Duplicated Except Mr, Which Can Be More Than Two. The Duplicated Function Work In Load Sharing Mode (Except Pc Which Works In Pilot/ Standby Mode Hence Smc Can Be Minimum 2 And Maximum 32 As Per Design. The Sma Station Holds The Eta And Pupe Functions And These Are Also Minimum 2 To Maximum 32. Smt