GSMnet GSM Software Core

Jump To:


A fully scalable GSM core network software stack with up to 14 simultaneous voice calls and GPRS/EDGE data sessions.

Media / Downloads:

GSM Network as Software

GSMnet provides all of the features and functionality that are currently available in any public network operator with added flexibility to further control user and application access on the network.

The GSMnet software uses an all IP distributed deployment model allowing for remote BTS units, local call routing and traditional regional based routing and switching. A centralized deployment can also be implemented providing the most cost effective means of deployment.


The GSMnet mobile core software provides full voice and data capabilities of a 2G/GSM network, including the following components:

Select a component to reveal more:

BSC (Base Station Controller)

The BSC acts as a resource switch dynamically managing radio connections and resources between the BTS and the MSC.

It manages handovers between BTS under its control and between itself and other BSCs in the network.

MSC (Mobile Switching Center)

The MSC’s main function is to manage and co-ordinate the set up of calls between GSM mobile users and PSTN users.

The MSC is a sophisticated switching engine which provides circuit-switched calling, mobility management and GSM service. This comprises voice, data and SMS services.

Home Location Register (HLR)

The HLR is the central store of home subscriber data including IMSI, MSISDN and services allowed.

The HLR stores provisioned subscriber data and is used during registration of devices to the network.

Visitors Location Register (VLR)

The VLR stores data for registered subscribers and reflects active users on the network.

Temporary users are allocated identities if not provisioned.

GPRS Support Nodes (SGSN/GGSN)

The SGSN and GGSN are used to provide data services to GSM devices connected to the network.

The SGSN manages Packet Data Protocol (PDP) contexts and sessions where the GGSN aggregates traffic and connects to a local network for Internet traffic.

Short Message Services Centre (SMSC)

The SMSC provides service delivery of SMS between users on the local network and to remotely connected devices on the PSTN.


The SIP service communicates with an upstream PBX for calling between mobile and PBX extensions.

The SIP service is also used when the GSM software is connected to the hosted SiRRAN network for transport of inbound and outbound PSTN calls.


One of the greatest advantages of GSMnet is the ability to register any device with any carrier SIM onto its network.

The ease with which the solution can be implemented and subsequently operated by the customer offers complete control over who can access the network. Optional full operator integration can be implemented for seamless service access.

GSMnet supports full integration to the IP PBX over SIP allowing flexible dial plans and call routing, particularly useful for extension dialling from mobile devices with no requirement to purchase or install a GSM transcoding module.

SiRRAN can provide SIMs compatible with its Core Network. On the macro wireless network, with an active service plan, the SIMs can operate on a global basis, taking advantage of 367 roaming partners worldwide. Alternatively, the SIMs can operate on the private network only, as required without the need to activate any service plan.