OMNI 200


PXML No. BABT/PXML/CRA.0020/0021/0022
APPROVAL No's. 210/220/230 - NS/3343/123/N/603533 / NS/3343/123/N/603532 / NS/3343/123/N/603538


The PABXs are Electronic, Digital, Stored Programme Controlled employing Time Division Multiplexing to establish connections and A Law Pulse Code Modulation for local voice transmission.

The standard attendant equipment comprises an attendant's (Operator's) console, an attendant interface card (ATTI) and an extension line card (PLCC). These cards are located in the Peripheral Equipment Modules (PEM's).

In the event of power or major equipment failure, predetermined extensions are connected to the Public network. The power fail extension telephones must be provided with Earth recall to ensure continued operation after power fail. In the case of systems fitted with DDI lines, these can be connected to a call answering machine in the by-pass emergency mode.

The Omni range supported numerous type of attendant consoles. For information on early consoles see NTX30.
The Omni 200 range only used the Level 3 console. This was an enhanced Level 2 with a Disc Operating System and greater on board memory.

OMNI 210
The system comprises a single cabinet and a TJF to which the cables from the PABX are terminated. The cabinet contains a mains power supply, one or two ringing generators and a shelf assembly (file) to house printed wiring cards. The file contains 36 card slots allocated as follows:

10 slots for dedicated control cards
1 slot for power cards
2 slots for digital links
23 "Universal" slots
Universal slots can hold any peripheral card (e.g. Extension or CO)

OMNI 220
The system comprises a single cabinet and a TJF to which the cables from the PABX are terminated. The cabinet contains a mains power supply, one or two ringing generators and two shelf assemblies (files) to house printed wiring cards.
Each file contains 36 card slots allocated as follows:

10 slots for control cards
1 slot for power cards
slots for digital link cards
23 "Universal" slots

Universal slots can hold any peripheral card (e.g. Extension or CO)

OMNI 230
The system comprises one or two cabinets, depending on the number of lines required. Additional cabinet(s) may be needed for housing batteries for back-up purposes. The system is 48V powered and an external rectifier unit is needed.

Each equipment cabinet contains up to five shelf assemblies (files) to house printed wiring cards. The files are referred to as Common Equipment Module (CEM) or Peripheral Equipment Module (PEM). A CEM contains the control cards needed to run the system. A PEM contains the peripheral cards (e.g. extension and trunk cards). A system normally contains one CEM (SIMPLEX) but it is possible to have a second CEM as Standby in case of a failure of the primary CEM (DUPLEX)

SYSTEM CAPACITIES
The maximum capacities for the OMNI 200 Series are as follows:


			OMNI 210	OMNI 220
	Extensions	256		512
	Trunks *	92		184
	Digital Links	2		4

			OMNI 230
			1 CEM/4 PEM	1 CEM/8 PEM
	Extensions	1024		2048
	Trunks *	512		1024
	Digital Links	8		16

     * Trunks include exchange lines      DDI and Private Circuits.

 

PARTS LIST

 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: December 14, 2010

FM