(3fXe GdSfJQGdGJ GdJdjahfjI (B= TELEPHONE SWITCHING SYSTEMS / s - (3aGQhb eMeO GdYGeQis ((3GdbGgQI (B: s (3eYgO fGUQ ddOQGSGJ GdGdcJQhfjI , s, 1998)
Keywords: (3GdOhGFQ GdGdcJQhfjIs; (3GdGJUGdGJ GdSdcjI hGddGSdcjIs; (3GdJdjahfs; (3GdJdjahf (B- (3fXGe GdJTZjds