Tag Archives: Broadband ISDN and ATM

Broadband ISDN and ATM Broadband ISDN and ATM, Even if the above services become popular. the telephone companies are still faced with a far more fundamental problem: multiple networks. POTS (Plain Old Telephone Service) and Telex use the old Circuit-switched network. Each of the new data services such as SMDS and frame relay uses its own packet-switching network. DQDB is different from these, and the …