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"NEBS Level 3" is a term from Bellcore special report, SR-3580, and means the equipment meets all of the requirements of GR-63-CORE and GR-1089-CORE. NEBS Level 3 has strict specifications for fire suppression, thermal margin testing, vibration resistance (earthquakes), airflow patterns, acoustic limits, failover and partial operational ...
The Bell System Practices (BSPs) is a compilation of technical publications which describes the best methods of engineering, constructing, installing, and maintaining the telephone plant of the Bell System under direction of AT&T and Bell Telephone Laboratories. [1]
iconectiv was established on October 20, 1983, as Central Services Organization [4] as part of the 1982 Modification of Final Judgment that broke up the Bell System. It later received the name Bell Communications Research. Nicknamed Bellcore, it was a consortium established by the Regional Holding Companies upon their separation from AT&T.
After the breakup of AT&T and the Bell System, the document was maintained and published by Bell Communications Research (BELLCORE) in 1983, 1986, 1990, 1994, and 1997. The 1983 and 1986 versions were known as Notes on the BOC Intra-LATA Networks , while the 1990 and 1994 editions had the title BOC Notes on the LEC Networks .
Transaction Language 1 (TL1) is a widely used management protocol in telecommunications.It is a cross-vendor, cross-technology man-machine language, and is widely used to manage optical and broadband access infrastructure in North America.
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This feature is also frequently called (and abbreviated) as visual message waiting indicator (VMWI). A VMWI, as defined in Telcordia GR-1401-CORE, is a stored program controlled switching (SPCS) system feature that activates and deactivates a visual indicator on customer-premises equipment (CPE) to notify the customer that new messages are waiting.
In Bell System telephone exchanges, particularly the 5XB switches, information from the marker told the sender that the call required ANI, and stored the calling equipment number in reed relay packs in the sender. The sender used the transverter connector (TVC) to seize a transverter (TV), which was a bay of a few hundred flat spring relays ...