We are the Swedish mobile core software specialist

Leissner, established in 1969,  is a renowned IT development company in Sweden. We are developing communication solutions for telecom operators and have contributed to standards and innovations in telecommunications.

Our vision is to contribute in breaking up the dominance of large telecom operators by delivering cost-efficient software and establish interoperability for new, fast growing independent operators. Leissner’s strength is the flexible and customer oriented development of new and existing functionality for operators in the telecommunications industry.

Leissner has over the years maintained a good track record of delivering stable and secure software for telecom operators. The Leissner product family includes traditional telecom systems and a MVNE/MVNO core platform. All systems are developed by Leissner employees in Sweden.

MVNE/MVNO Mobile Core

MVNE/MVNO Mobile Core is a suite of mobile core components, providing a flexible mobile setup with unique functionality that can be customized to fit any operator that is providing mobile services as MVNE or MVNO.

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PGW/GGSN

PGW/GGSN is a standardized packet core component that operators and MVNOs need between the GSM, UMTS and LTE network and the Internet.

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HSS/HLR

HSS/HLR is a central subscriber database that contains details of each subscriber that is authorized to use the mobile core network.

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OCS

OCS is a standardized Online Charging System.

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GMSC

GMSC is a standardized voice softswitch that MVNOs need to route voice calls outside the mobile network.

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MVNO SaaS

MVNO SaaS is a cloud service including a complete suite of services to be used by any corporation that need a fully managed MVNO service.
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Milestones in Leissner company group

2019

Celebrates 50 years in the IT industry.
Logo Leissner Data 50 years

2016

More than 10 MVNOs installed on Leissner core software.

2015

First mobile core installation outside Sweden.

2014

The mobile platform now offers complete MVNE functionality.

2011

Leissner's first full MVNO setup together with Hi3G Access AB in Sweden.

2008

Interconnection agreements for SMS in Sweden and started development of systems for SMS.

2005

Leissner Telecom Billing system was introduced to the Swedish market.

2002

Started development of systems for telephony.

The company group became a telecom operator and signed fixed telephone interconnection agreements with Telia.

2001

Strategical decision to be a telco system supplier.

2000

Gotanet was one of the first actors in Sweden to offer ADSL access services using Telia telecommunications stations.

1996

Götalandsnätet AB was founded with the brand Gotanet acting as Internet Service Provider (ISP).

1978

Obtained the first mainframe, SAAB D22.

1969

Leissner Data AB was founded.

1969