TY  - BOOK
AU  - Coover,Edwin R.,1942-
TI  - Tutorial, digital private branch exchanges (PBXs)
SN  - 0818608293
PY  - 1989///
CY  - Washington, D.C.
PB  - IEEE computer Society
KW  - Telephone
KW  - Private branch exchanges
KW  - Telephone switching systems, Electronic
KW  - Private branch exchange telephone equipment industry
KW  - Digital electronics
N1  - BIbliography : p. 377-381
ER  -