This paper describes the development of Trunk Interface Board(TIB) which provides a trunk interface(Tl/El) and tone generating function for originating number tracing system.
It is consist of following parts, control part, sending/receiving part, clo...
This paper describes the development of Trunk Interface Board(TIB) which provides a trunk interface(Tl/El) and tone generating function for originating number tracing system.
It is consist of following parts, control part, sending/receiving part, clock synchronization and distribution part, tone generating part and status maintenance/management part To achieve a low-cost, compactness, flexibility, and reliability, easily programmable single-chip micro-controller and firmware technique are used.
From the experimental results using off-line test-bed and on-line field target system, we confirmed that TIB is more compact and flexible than the previous developed board.