TY  - GEN
AU  - Usman Zafar Chaudry; Prof Habeel and  Faraz, Advisors
TI  - Capacity enhancement of 3+12 Lines Private Automatic Branch Line Exchange
U1  - PR 1630 
PY  - 1999///
CY  - Rawalpindi
PB  - NUST
N1  - BE Project Reports
ER  -