GMSC is a standardized voice softswitch for MVNOs

GMSC voice softswitch, developed in Sweden by Leissner, launched in 2002 and is used with good experience by more than 10 telecom operators. Leissner GMSC is a standardized voice softswitch that MVNOs need to route voice calls outside the mobile network.
Leissner Operator Switch is a flexible GMSC that interacts with the HSS/HLR to obtain routing information for voice calls that are going to be routed outside the mobile network.

Operator Switch has a proven track record of interoperability with numerous telecom operators.

GMSC (Operator Switch) is part of a complete suit of mobile core components in Leissner MVNE/MVNO Mobile Core. This suit of flexible functionality empower MVNO and MVNE to stay ahead of competition and gives low TCO (Total Cost of Ownership).