Notes on the Network

Notes on the Network is a publication created by the American Telephone & Telegraph company, this publication historically dates back to 1945 as "Notes on Nationwide Operator Toll Dialing". AT&T published a new edition in 1955 under the title "Notes on Nationwide Dialing", and then in later editions as "Notes on Distance Dialing" in 1956, 1961, 1968 and 1975. The first use of the title "Notes on the Network" was for the 1980 edition. This document was maintained and published by Bell Communications Research (BELLCORE) in 1983 and 1986 (both of these editions known as "Notes on the BOC Intra-LATA Networks"), 1990 and 1994 (both of these editions known as "BOC Notes on the LEC Networks), and 1997 (Bellcore Notes on the Networks). Bellcore was sold in 1999, and the new name for the company became Telcordia. A new edition was published in 2000 as "Telcordia Notes on the Networks". Between 1999 and 2002, Telcordia also published a series of some twenty-one topic-specific "modules" individually available, or for sale as a set, known as the "Telcordia Notes on" Technology Series. As of 2012, the 2000 edition (Telcordia Notes on the Networks) is the most recent, and so far there have been no additional "modules" nor updates to existing "modules" in the Telcordia Notes Technology Series since the original twenty-one topic-specific "modules" of 1999-2002. For the current version, see Telcordia SR-2275

Additionally, in 1983, shortly before the 1984 divestiture of AT&T, Telecom-Canada published their own "Digital Network Notes", an update and companion volume to the 1980 AT&T "Notes on the Network", with more "Canada-specific" information.