Abstract: To the problem of unsuitable use in narrow band realtime service with ATM and frame-relay, A scheme of fast variable length packet switching through hardware implementation which combine with the advantages ofATM and frame-relay is given to support narrow band real time voice services andwide band data services effectively. In scheme, the variable length frame structure is used, the maximum length is limited less than 120 bytes, packets are transfered and switched according to DLCI located in the head of the frame. To implement the system, we designed the entire relative switching chipset. Now the scheme is used successfully in CDMA base station developed by ourselves.

Key words: CDMA, frame-relay, faster packet switching