Object program – (1) Fully compiled or assembled software that is ready to be loaded into the computer. (2) The output from processing a source program through an assembler or compiler. Synonym: object code.
Off-hook – (1) Condition existing when the receiver or handset is removed from its switchhook. (2) The active state (closed loop) of a single telephone or PBX line loop.
Off-line – (1) Condition that exists when devices or subsystems are not connected into, do not form a part of and/or are not subject to the same controls as an operational system. (2) A device which is not permanently connected to the processor or to external circuits.
Off-network access line (ONAL) – (1) A connection from a private switched network to the public switched network.
(2) The connection provided by a carrier and used in common by subscribers to enter and/or exit from the switched network.
(3) Circuit between Sprint switch and the line side of a telco office for FGA services.
Off-network access trunk (ONAT) – The circuit between the Sprint switch and the trunk side of a telco office for FGB and FGD services.
Off-network calling – Telephone calls which originate in or pass through private switching systems in transmission networks and are extended to stations in the public telephone system.
Off-premises extension (OPX) – Peripheral PBX equipment located in a building other than the one housing the PBX itself.
On hook - (1) Condition existing when the receiver or handset is resting on the switchhook. (2) The idle state (open loop) of a single telephone or PBX line loop.
On network calling – A call that originates and terminates on a private network.
On-line system – A network interface which provides direct interface between applications programs stored in the computer and terminals used for data entry and output.
Operating system – Software that controls the management and execution of programs.
Operator assisted calls – (1) Direct distance dialing (DDD) calls which require and receive help by telephone company operators. (2) Person-to-person, collect calls, calling card calls from rotary phones, etc.
Optical fiber – Any filament or fiber made of dielectric materials that is used to transmit light and/or to guide signals. [Optical fiber typically consists of a core, that carries the signal and cladding, a substance with a slightly higher refractive index than the core, which surrounds the core and serves to reflect the light signal back into it.]
Original equipment manufacturer (OEM) - (1) Producer of a product made for assembly into a final system or larger subassembly by another.
Originating office – The central office that serves the calling party.
Other common carriers (OCC) - Specialized common carriers, domestic or international record carriers and domestic satellite carriers engaged in providing private line services (voice, data, audio or video) as authorized by the FCC.
Out-of-band – (1) Any entity outside an assigned range, scope or magnitude. (2) Any frequency outside the spectrum used for voice.
Out-of-band signaling – Use of a seperate data link which is not in the voice circuit to transmit call set-up and ANI information from carrier to carrier, or from carrier to customer.
Outage – (1) Any disruption of service. (2) The point at which a customer releases a circuit for repair, lasting until the circuit is returned to the customer in working condition.
Outage time – Accumulated interval between unavailable and restoration time. It begins when a customer releases the circuit for repair and ends when the circuit is returned to the customer.
Outbound telemarketing – Any outgoing call designed to sell or service a customer or prospect. [Outbound telemarketing includes: lead generations, setting appointments, direct sales, collections and sales support.]
Overbuild – Adding radio capacity to a telecommunications network.
Overflow – (1) Switching equipment which operates when the traffic load exceeds the capacity of the regular equipment. (2) Traffic which is handled on overflow equipment. (3) Traffic which exceeds switching capacity and is lost. (4) The carry digit in a digital computer. (5) Intermediate message storage which serves as an extension of in-transit storage to preclude system saturation; an example, magnetic tape.