The Digital Private Network Signalling System ( DPNSS ) is a network protocol used on digital trunk lines for connecting two PABX.

DPNSS was developed in the early 1980s by BT, or its forerunner, Post Office Telecommunications in recognition that the emerging Digital Private Circuit Primary Rate product ' Megastream ' had to address the market for both data and voice, the latter being significantly greater because of the market for PBXs.

The support for DPNSS as BT's own signaling protocol also differentiated BT's private circuit ’ s services from those of its emerging rival Mercury Communications.

Nevertheless, the elegance of the protocol and its compatibility with PBX features ensured the adoption DPNSS actually grew in Europe, compared to the much slower take-up of Qsig.

Instead, it presumably refers to the practice of setting law books and citing legal precedents in blackletter type, a tradition that survived long after the switch to roman and italic text for other printed works.

This type of switch technology happens to be most commonly used in handheld controllers, mobile phones, automotive, consumer electronics and medical devices.

* Rotary system, a type of pre-electronic telephone switch

The mechanism actuating the transition between these two states ( open or closed ) can be either a " toggle " ( flip switch for continuous " on " or " off ") or " momentary " ( push-for " on " or push-for " off ") type.

In a push-button type switch, in which the contacts remain in one state unless actuated, the contacts can either be normally open ( abbreviated " n. o.

These terms give rise to abbreviations for the types of switch which are used in the electronics industry such as " single-pole, single-throw " ( SPST ) ( the simplest type, " on or off ") or " single-pole, double-throw " ( SPDT ), connecting either of two terminals to the common terminal.

The transistor is acting as a switch, and this type of operation is common in digital circuits where only " on " and " off " values are relevant.

* The Beijing Gazette makes an official switch in its production process of newspapers, from woodblock printing to movable type printing ; private newspapers in Ming Dynasty China were first mentioned in 1582.

In analog circuit design, a multiplexer is a special type of analog switch that connects one signal selected from several inputs to a single output.

While the exact meaning of the term layer-4 switch is vendor-dependent, it almost always starts with a capability for network address translation, but then adds some type of load distribution based on TCP sessions.

The alternative type of duplexer is a transmit-receive switch ( TR switch ) that alternates between connecting the antenna to the transmitter and to the receiver.

primary-4ess Lucent 4ESS switch type for the U. S.

primary-5ess Lucent 5ESS switch type for the U. S.

primary-dms100 Northern Telecom DMS-100 switch type for the U. S.

primary-net5 NET5 switch type for UK, Europe, Asia and Australia

primary-qsig QSIG switch type

primary-ts014 TS014 switch type for Australia ( obsolete )

* Slip, a type of rail switch

The ultimate goal of most levels is not to merely reach the end but to complete the type ( s ) of objective ( s ) specified: extermination of all or specific creatures, exploration of a level or locating an area in the level, retrieving one or more item, hitting a certain " repair " switch, or preventing half of the civilians from being killed ( a mission only present in two levels in the first game ).

For routers with a toggle type on / off switch it is important to check to verify the switch is in the off position, prior to plugging it in.

The switchgear on this stock was of the older solenoid type that required a large switch compartment behind one of the driving cabs.

One reason they gave for the switch was that they found it less stressful during competition, because it was difficult to anticipate which moves their type B programs would play, and why.

He pointed out the switch to me and for a moment I foolishly believed that he would let deed follow words.

The initial setting of the availability table indicated that the index word or electronic switch was not available for assignment.

During the assignment pass, each instruction is examined for reference to the symbolic name of an index word or electronic switch.

When such a reference is found, an actual address is assigned and the availability table is changed so that the assigned index word or switch is no longer available for later assignment.

Hoag stretched his left hand to the wall and fumbled for the switch: evil flourishes in the dark.

Abandoning caution, Alec leaped out of bed and groped for the light switch.

Again he groped for the light switch.

Solly Hemus announced a switch in his starting pitcher, from Bob Gibson to Ernie Broglio, for several reasons: 1 Broglio's 4-0 won-lost record and 1.24 earned-run mark against Pittsburgh a year ago ; ;

The economist does not look for a drastic switch in the budget during this recovery and believes it `` even more unlikely that the Federal Reserve will aggressively tighten monetary policy in the early phases of the upturn as was the case in 1958 ''.

It seemed too much trouble even to reach for the switch ; ;

Body parts, pointers, adapted mice, joysticks, or eye tracking could be used, whereas switch access scanning is often used for indirect selection.

After starting his writing career by writing for " true confession " style pulp magazines like True Story, van Vogt decided to switch to writing something he enjoyed, science fiction.

Because of a failure by the crew to activate a certain switch in the LM before sealing it off, it initially tumbled after separation and did not execute the rocket burn necessary for the craft's intentional de-orbit.

Dialling these numbers will cause the local switch to announce which carrier your calls are being routed through for a specific category of calls.

A single cable coming out of the 5200 plugged into the switch box and was used for both electricity and the television signal.

The devices can switch roles, by agreement, and the slave can become the master ( for example, a headset initiating a connection to a phone will necessarily begin as master, as initiator of the connection ; but may subsequently prefer to be slave ).

Frames destined for nodes connected to the originating segment are not forwarded by the switch.

There are three potential triggers for a context switch:

This context switch can be triggered by the process making itself unrunnable, such as by waiting for an I / O or synchronization operation to complete.

In order to switch processes, the PCB for the first process must be created and saved.

The later entry is particularly noteworthy as it constitutes the first clear evidence for the switch to torsion catapults which are more powerful than the flexible crossbows and came to dominate Greek and Roman artillery design thereafter.

A call centre is often operated through an extensive open workspace for call centre agents, with work stations that include a computer for each agent, a telephone set / headset connected to a telecom switch, and one or more supervisor stations.

Power sources of calculators are batteries, solar cells or electricity ( for old models ) turning on with a switch or button.