The competitive battle between Northeastern and SNET was waged on two fronts; public branch exchanges (PBXs) and key telephones.^[3]A PBX consists of three elements: the equipment located on a customer's premises and used to switch calls from one telephone line to another; a switchboard which controls that operation; and the associated telephone sets and wiring. Key telephones, which are a familiar sight in business offices, are equipped with keys or buttons to give the set access to more than one telephone line.

During the first few years of their rivalry, both Northeastern and SNET obtained PBXs from outside suppliers often Nippon Electronics. But in January 1977, SNET submitted, and the Connecticut Division of Public Utilities Control (DPUC) approved, a tariff enabling the utility to offer two PBXs manufactured by Western Electric the Dimension 100 and the Dimension 400.^[4]These units, particularly the Dimension 400, were well-received by Connecticut businessmen. We are told that SNET marketed over one hundred Dimension PBXs between March 1977 and February 1978.

Question 11xc14

I am confused whether clubbing is a feature of chronic obstructive

pulmonary disease (COPD) or not - you have mentioned that it is not a

feature of COPD but some books do say that clubbing is a clinical feature

of COPD.

Question 12

A 70-year-old man with chronic obstructive pulmonary disease (COPD)

and a past history of myocardial infarction with a left ventricular ejection

fraction (LVEF) of 25% is dyspnoeic on slight exertion such as walking,

bathing. He is not orthopnoeic and claims to have no paroxysmal

nocturnal dyspnoea (PND). He has no wheezing or productive cough and

his blood pressure is normal. He has had three episodes of ventricular

tachycardia (VT) and has been on amiodarone for the past year. What is

the best way to determine the exact cause of dyspnoea in this case?

Question 13

In bronchiectasis, what is the reason for using a bronchodilator if the

airways are already dilated?

Question 14

Why is it that asthmatics having a severe attack can be seen clawing their

hands?

Question 15

Practical use of steroids:

Which form of regimen is better (alternate-day, daily or in pulse form)?

What should be the dose (once daily or three times daily or {2/3} in

the morning)?

For how long, especially when to give short courses as in asthmatics,

when we don't need to taper it down?

Question 16

In pregnancy, what is the recommended treatment for bronchial asthma?

Is the use of the long-acting beta-adrenergic agonist Seretide, the

corticosteroid Symbicort and leucotriene receptor antagonists (LTRAs)

recommended?

Question 17

In asthma patients, which is the safest analgesic to use?

Question 18

Is the use of nebulized heparin in the treatment of asthmatic attacks

recommended?

Question 19

I would like to ask you about pneumonia and its classifications in

particular; what are they?

Question 20

What are the pathological differences in typical and atypical pneumonia?