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ITS - FCC DOCKET 86-79 - FURNISHING OF CUSTOMER PREMISES EQUIPMENT BY THE BELL OPERATING TELEPHONE COMPANIES AND THE INDEPENDENT TELEPHONE COMPANIES Organization: ITS
API PSD 2213 - IGNITION RISKS OF ORDINARY TELEPHONES Organization: API
Date: 1974-07-01
Description: The scope of this data sheet is limited to the possibility of igniting Class I, Group D vapors by a conventional Bell system (or equivalent) telephone set. Group D vapors, as defined in Article 500 of the National Electrical Code, include gasoline, hexane, benzene, butane, propane, alcohol, acetone, lacquer solvent and natural gas.
ATIS 0300106 - INTERCARRIER CALL COMPLETION/CALL TERMINATION HANDBOOK Organization: ATIS
Date: 2012-08-01
Description: Call completion/call termination in today's Public Switched Telephone Network (PSTN1) depends on coordination between different service provider entities, each playing their part in setting up a workable connection between calling and called parties. As the PSTN has evolved through the Bell System divestiture, the Telecom Act of 1996, and the introduction of Internet Protocol-based technologies, the number and diversity of these entities has grown.
NR/L2/SIG/11201/MODX10 ISSUE 1 - SIGNALLING DESIGN HANDBOOK: LEVEL CROSSINGS - AUTOMATIC HALF BARRIERS - COMPLIANCE DATE: 3 SEPTEMBER 2011 Organization: NR
Date: 2011-09-03
Description: NOTE In an absolute block area, then sending "6 bells" is sufficient. In other areas an emergency alarm or similar shall be provided.

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