Also called a "Class 4 switch" or "TDM switch," a tandem switch is a computer that is specialized for TDM-based, circuit-switched telephone calls. Tandem switches are typically from Lucent and ...
The practice of front-ending a carrier's telephone switch with a softswitch. The softswitch culls traffic off the circuit-switched trunks and onto IP or ATM networks. See tandem switch.
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