What Is It and How Does It Work?

PBX phone system is a business telephone system. It is extensively used in enterprises to establish a telephone network. Enterprises use PBX phone systems as their private telephone network for inter-office and external global communication networks. Unlike the plain old telephone system i.e. POTS phone system, PBX has evolved in several ways. From copper cable transmission to internet protocol (IP) audio signal transmission, the PBX phone system has evolved with time and technology.

PBX stands for Public Branch Exchange. It is a private business telephone system adopted by the organizations to establish a secure communication channel. It can be used over copper cable connectivity and with the IP transmission media as well. PBX phone systems can be used with copper cable connection, analog, and digital combination transmission-lines, and voice over IP (VoIP). Unlike the public switched telephone network that is the POTS phone system, the PBX phone system allows multiple connections via a single telephone line. It saves the cost of acquiring an individual line for each communication device.

Initially, the PBX phone system was developed to offer a private network for analog signal transmission for the office spaces. Further, it evolved into an external connectable network using the POTS phone system. For the external user connection, PBX converts analog data to digital data or vice versa.

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Answer 1

Answer:IP PBX phone systems place and receive phone calls over the internet. It does so by converting analog voice signals into digital. From there, it directs calls to a VoIP service provider to manage the initiation and termination of every call. At the core, IP-based voice service uses Session Initiation Protocol

Explanation:


Related Questions

Một bệnh nhân nhi bị sốt không rõ nguyên nhân chúng ta dùng thuốc hạ sốt là aspirin được không và giải thích?

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. Tachycardia means ...................heart rate a) fast b) slow c) irregular d) arrhythmic

Discuss the physiology of the respiratory system, and explain the process of ventilation. (Be Specific)\

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oh man i don’t like drinking water

Physiology of  the respiratory system is a follows:-

As a person inhales, the diaphragm contracts and moves downward. The space left in the chest allows the lungs to expand. Muscles in the ribs also help enlarge the chest cavity, pulling the rib cage upward and outward.Once the lungs expand, air moves in through the nose and mouth.The air travels down the trachea and into the lungs, allowing a person to breathe.The exchange of oxygen and carbon dioxide occurs before exhalation. When a person exhales, the diaphragm relaxes, the lungs recoil, and the air moves out of the lungs.

Ventilation is commonly referred to as breathing.

It is the process of air flowing into the lungs during inspiration and out of the lungs during expiration.The air moves through the passages because of pressure gradients that are produced by contraction of the diaphragm and thoracic muscles.Individual alveoli have variable degrees of ventilation and perfusion in different regions of the lungs.

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When evaluating research, what factors should be considered? Why are these factors important? Provide some examples to illustrate the importance of each factor.

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Answer:

l

Explanation:

Provide one example of how stress can affect our health.

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Answer:

it can lead to headache and high blood pressure

Mrs. Quinn has just turned 65, is in excellent health and has a relatively high income. She uses no medications and sees no reason to spend money on a Medicare prescription drug plan if she does not need the coverage. She currently does not have creditable coverage. What could you tell her about the implications of such a decision?

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Answer:

If she does not sign up for a medicare prescription drug plan as soon as she is eligible to do so. The answer is (b).

Explanation:

It is correct.

Mrs. Quinn, as a healthy individual with a high income, you may be questioning the need for a Medicare prescription drug plan if you do not currently require the coverage.

However, there are a few important implications to consider before making a decision:

1. Late Enrollment Penalty: Medicare prescription drug plans (Part D) are voluntary, but if you choose to enroll later when you do need coverage, you may have to pay a late enrollment penalty. This penalty is added to your monthly premium and is calculated based on the number of months you were eligible for coverage but did not enroll.

2. Coverage Gap (Donut Hole): Medicare Part D plans often have a coverage gap, also known as the "donut hole." This refers to a temporary limit on what the plan will cover for prescription drugs. If your medication needs change in the future and you require expensive drugs, not having a Part D plan could result in higher out-of-pocket costs during this coverage gap.

3. Future Medication Needs: While you are currently not taking any medications, it's important to consider that health circumstances can change over time. Even though you may be in excellent health now, there is always a possibility that you may need prescription medications in the future. Having a Medicare Part D plan in place can help provide financial protection and access to necessary medications if that situation arises.

4. Financial Planning: Considering your high income, it's essential to evaluate the financial aspect. Medicare prescription drug plans have monthly premiums, deductibles, and copayments. Assessing the potential costs associated with a Part D plan and comparing them to the potential out-of-pocket expenses without one can help you make an informed decision.

5. Creditable Coverage: Lastly, it's important to note that not having creditable coverage, which refers to prescription drug coverage that is at least as good as Medicare's standard coverage, may impact your ability to switch to a Medicare Part D plan later without facing a late enrollment penalty.

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essential oils have a sweet taste

Answers

Have a sweet smell not taste

Which of the following is associated with irreversible cell damage?
A. Glycogen depletion
B. Flocculent densities in mitochondria
C. Cellular swelling
D. Detachment of ribosomes from tER
E. Loss of microvilli

Answers

Explanation:

interruption of membrane integrity;

Answer:

YOUR ANSWER WILL BE C. CELLULAR SWELLING


Blair's ability to label her experience as "being stressed out" demonstrates the
aspects of emotional experiences.

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It demonstrates cognitive aspect of emotion.

Emotion simply means the feeling, behavioral and the physiological changes seen in an individual.

According to the cognitive theory, the mental activities of a person and their thoughts play a role in the emotions that are formed.  

Cognitive theory of emotion explains an individual's ability to be able to label her experience such as sadness, joyful, pity, stressed out etc.

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. Tachycardia means ...................heart rate a) fast b) slow c) irregular d) arrhythmic

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Hi,

Answer:

Tachycardia is a fast heart rate

An apple and a glass of milk can give you more nutrition as compared to a milkshake prepared from apple and milk. Justify it on the basis of Physiology of Git

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Due to difference in the amount of apple and milk.

An apple and a glass of milk can give you more nutrition as compared to a milkshake that is prepared from apple and milk due to there difference in their concentration. A milkshake that is prepared from apple and milk has lower in quantity means half piece of apple and half glass of milk is used while on the other hand, full apple and full glass of milk are more in quantity so they are high in nutrition and energy.

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4 federal law mandated changes in HIPAA

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Answer:

There are four key aspects of HIPAA that directly concern patients. They are the privacy of health data, security of health data, notifications of healthcare data breaches, and patient rights over their own healthcare data

Explanation:

I'd really appreciate a brainleast:)

tinh dầu nào có vị ngọt

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Explain In English

Please

Basophils are O granules a) involved in the process of making hemoglobin. b) involved in the allergic process. Q) that resist infection by microorganisms. D) It fights infection with parasites.

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Basophils contain large cytoplasmic granules which obscure the cell nucleus under the microscope when stained. However, when unstained, the nucleus is visible and it usually has two lobes. ... Both cell types store histamine, a chemical that is secreted by the cells when stimulated.

A/An is a type of blood cell that's also called a red blood cell. a) Jeukocyte O b) thrombocyte c) plasma d) erythrocyte

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Answer:

red blood cell, also called erythrocyte,

Explanation:

Hope it helps

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which medicine we drink oreat
1. fevadol
2. adol




Answers

1.) Fevadol is the medicine we drink or eat

The answer is 1. Fevadol

- Dị nguyên và giải thích triệu chứng đối với các kiểu dị ứng qua trung gian IgE

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this isnt even english bro this isn’t even possible to answer is d

A repetitive dive is any dive:_____.
a. Made within 24 hours of a previous dive.
b. Made within 48 hours of a previous dive.
c. In which your computer indicates there is residual nitrogen left in your system from a prior dive.
d. Both the first and third answers are correct.

Answers

This is any dive that you make before you have completely offgassed from any previous dive or dives. Residual Nitrogen Time (RNT) This is the amount of time you must consider as already having been spent at a given depth for a planned repetitive dive.

Repetitive dive is any dive that you make before you have completely off gassed from any previous dive or dives.

What is repetitive dive?

This is any dive that you make before you have completely off gassed from any previous dive or dives. Residual Nitrogen Time (RNT) This is the amount of time you must consider as already having been spent at a given depth for a planned repetitive dive.

How do you calculate repetitive dive?

To calculate this figure, you add your residual nitrogen time to your actual dive time.

Repetitive dive is any dive that you make before you have completely off gassed from any previous dive or dives.

Hence , C is correct option

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What is the term for the fire protection method in which townspeople formed two lines to pass containers filled with water toward the fire and empty containers away from it?

Water brigade

Bucket brigade

Hose brigade

Fire brigade

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Answer:

bucket brigade

Explanation:

What are the sites for abdominal hemia​

Answers

Answer:

The most common types of hernia are inguinal (inner groin), incisional (resulting from an incision), femoral (outer groin), umbilical (belly button), and hiatal (upper stomach). In an inguinal hernia, the intestine or the bladder protrudes through the abdominal wall or into the inguinal canal in the groin.

Explanation:

hopeithelps <//3

The weakened abdominal wall can be present at birth or may develop later in life. The most common site is the groin, but hernias can also form in other areas, such as the navel. If the lump can be gently pushed back through the abdominal wall, it is known as a reducible hernia.

prior to a medical assistant applying oxygen to a patient, what must a medical assistant get from the provider?

Answers

a physical and a check up

The medical assistant should get a recent laboratory results from the provider before oxygen is applied to a patient by the medical assistant.

It is necessary for the medical assistant to be aware of the laboratory results in order to know the health of the person and the information regarding the test done.

The laboratory test is also useful in knowing how well functioning the lungs of the patient is. The medical assistant has to be well satisfied with the result before oxygen will be given to the patient.

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A patient who is prescribed a dose inhaler will find that it must be filled with a) medicine in powder form only. Works with lower (not upper) respiratory diseases only. Full of medicine used to give a fixed amount of medicine per oral inhalation. d) Medication in the form of a spray only.

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d, medication in the form of spray only

Where was the first recognized firefighting force, known as the Familia Publica, organized?

Rome

London

New York

Philadelphia

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Answer:Who were the Familia Publica? The first recognized firefighting force organized in ancient Rome.

Explanation:

Acute myocardial infarction is a condition with a) obstruction of veins and death of heart muscle. b) obstruction of the coronary artery and death of heart muscle. c) rupturing of plaque. d) a blood clot in the coronary artery.
heelp me !!

Answers

Hi,

Answer:

b) obstruction of the coronary artery and death of heart muscle.

Explanation:

A nurse is caring for a client undergoing ECT and will receive succinicholine. the client asks the nurse about the medication. Which of the following responses should the nurse make.

Answers

You have not written the respones

Give me storylike explanation of the cell cycle

Answers

Answer:

Cell cycle is the name we give the process through which cells replicate and make two new cells. Cell cycle has different stages called G1, S, G2, and M. G1 is the stage where the cell is preparing to divide. To do this, it then moves into the S phase where the cell copies all the DNA. So, S stands for DNA synthesis. After the DNA is copied and there's a complete extra set of all the genetic material, the cell moves into the G2 stage, where it organizes and condenses the genetic material, or starts to condense the genetic material, and prepares to divide. The next stage is M. M stands for mitosis. This is where the cell actually partitions the two copies of the genetic material into the two daughter cells. After M phase completes, cell division occurs and two cells are left, and the cell cycle can begin again.

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Qual é o pigmento responsável pela cor da pele?

Answers

quality e o pigmento responavel pela cor da pele

. Mr. Sanchez comes to the desk to check out after seeing the provider. When Laura tells him that his bill is $95, he complains that he only saw the provider for 10 minutes. The fee is in accordance with evaluation and management guidelines. Explain the fees to Mr. Sanchez.

Answers

What Mr. Sanchez must understand is that the fee is not a variable rate depending on the minutes that the consultation lasts, but on the contrary it is a fixed rate, that is:

an immutable value that responds to the use of the medical service that does not respond to the duration of it.

In this way, nothing else matters than the result of the service, that is, the evacuation of the medical consultation. Thus, if this was done in 5, 10 or 60 minutes, only the result of it will be considered when establishing the rate.

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Does friction enhance movement? True or false

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Answer:

False. Friction does not enhance movement.

Friction is the force that is generated when two objects "rub" on each other.  

For example, it's hard to push an object on a rug, but it's easier to push an object on hardwood floor. This is because the rug creates more friction when the object rubs against it, thus slowing it down.

So, the statement is false.

Hope this helps.

Answer: False

Explanation:

Friction always in opposite direction to movement

Basophils are O granules a) involved in the process of making hemoglobin. b) involved in the allergic process. Q) that resist infection by microorganisms. D) It fights infection with parasites.

Answers

Hi,

Basophils are granulocytes:

b) involved in the process of allergic reactions.

While giving discharge instructions to a patient who will be taking cholestyramine [Questran], the nurse wants to assess the patient's understanding of the treatment. Which statement made by the patient best demonstrates a need for additional teaching

Answers

i think the answer is to give the patient a healthy dose of cosine
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