pdf SWBT Service And Equipment Manual [02] - Part III Section 2: Telephone Bells & Auxiliary Signals Popular

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SWBT Service And Equipment Manual [02] - Part III Section 2: Telephone Bells & Auxiliary Signals
ca 1948 with later additions.  Includes bells, buzzers, gongs, and horns.  Other parts of this manual are in separate documents.  The number in brackets [n] is the sort order for this document based on the documents currently in the Library.  It may change as new sections of the manual are added.
 
Keyword:  Line signals; busy signals; 1A key; 21 lamp; 15 lamp; 14 lamp; 20 lamp; 18 lamp; 16 lamp; 17 lamp; 551A; 707-679; 549; no. 7; xylophone

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