tandem switching

tandem switching

[′tan·dəm ′swich·iŋ]
(communications)
System of routing telephone calls in which calls do not travel directly between local offices, but rather through a central office.
References in periodicals archive ?
More than 100 customers -- members of Lucent's Open Network Platforms Partner program -- have deployed earlier versions of the EXS platform to carriers worldwide, providing solutions such as intelligent networking, tandem switching, international gateway & callback, virtual private network, call centers, wireless local loop and a wide variety of enhanced subscriber services such as unified messaging, prepaid calling and single-number services.