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The Pennsylvania state system of intermediate units (IU) was created in 1970, as part of the public school system of the Commonwealth, replacing the 67 county superintendents of schools offices which had existed since the 1850s. Act 102 created the boundaries for each IU, assigned every school district to an intermediate unit, established a ...
A door phone controller (DAC-1Z) can be connected to your Merlin Plus system to allow employees to answer calls made from a business entrance. It is connected directly to a CO line port on the Merlin Plus control unit. Callers using the door phone can press a button at the building entrance to ring a telephone in your Merlin Plus system.
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
This lists Alcatel switches before the merger with Lucent Technologies. 1000 E10 / S12 (during the 1990s the E10 and S12 systems were converted into a single product line) E10 versions: E10A (E10N3)- Original switch introduced in 1972 one of the earliest deployments of TDM switching in the world. E10B (E10N1)- Major revision in the 1980s which ...
Central Susquehanna Intermediate Unit #16 (CSIU), located in the Milton Industrial Park, Milton, Pennsylvania, was created by the Pennsylvania General Assembly in 1971 as one of 29 Intermediate Units in the commonwealth. Intermediate units serve a given geographic area's educational needs and function as a step of organization above that of a ...
Secure Terminal Equipment (STE) is the U.S. government's current (as of 2008), encrypted telephone communications system for wired or "landline" communications. STE is designed to use ISDN telephone lines which offer higher speeds of up to 128 kbit/s and are all digital. The greater bandwidth allows higher quality voice and can also be utilized ...
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