Related Definitions Exchange Number means one-half of the number of shares of Common Stock, one-thousandths of a share of Preferred Stock, or shares or other units of other property for which a Right is exercisable immediately prior to the time of the action of the Board to exchange the Rights. Sample 2. Sample 3.
What does exchange mean in a phone number?
It is what makes your phone calls work in the sense of making connections and relaying the speech information. The term exchange can also be used to refer to an area served by a particular switch. And more narrowly, it can refer to the first three digits of the local number.
Why do old phone numbers have letters?
Full words were used in order to help customers remember the telephone exchange name, and because they were easy to understand, especially for switchboard operators. Similar-sounding letters would cause confusion, so distinct names or phrases were preferred.
What was the old time phone number?
The numbers were simple and easy to remember. In New York City, residents dialed Meridian 1212. In Baltimore, the number was 844-1212. Out west, the service was called POPCORN, because in order to reach it you spelled the word on your phone keypad.
WHEN DID phone numbers go from 5 to 7 digits?
1947 to 1951 The NANP area codes were implemented in use to allow operators to dial other operators for call completion assistance. Several cities were upgraded in this period to seven-digit (two-letter-five-number) phone numbers.
What year did phone numbers have 4 digits?
1920 In December 1920, as the phone company prepared for direct local dialing, all numbers became four digits.
When did they stop using 5 digit phone numbers?
1960s The 2L-5N format, a widely used numbering plan, was a system of using two letters from a central office name with four or five digits, which was designated as 2L-4N or 2L-5N, with L standing for “letters” and N for “numbers”, respectively. This format was introduced in 1920s and eventually phased out by the 1960s.
DID phone numbers used to be 7 digits?
Numbers in 2L+4N cities (such as Montréal and Toronto) were systematically lengthened to seven digits in the 1950s, a few exchanges at a time, so that all local numbers were seven digits when direct distance dialling finally came to town.
Why are phone numbers 7 digits long?
Telephone engineers created a 7-digit system for “all number calling” to expand their pool of possible number combinations. The first 3 digits would correspond to a certain phone service provider, and the last 4 digits would remain as a personal calling code.