TY  - GEN
AU  - Coover, Edwin R.
TI  - Tutorial : digital private branch exchanges (PBXs)
SN  - 0818648293
PY  - 1989///
CY  - Washington
PB  - IEEE Computer Society Press
KW  - DIGITAL COMMUNICATION SYSTEMS
KW  - TELEPHONE-Private branch exchanges
KW  - TELEPHONE SWITCHING SYSTEMS, ELECTRONIC
KW  - DIGITAL ELECTRONICS
ER  -