Carrier Systems

Aarenet provides turnkey systems build to specific customer requirements.

Aarenet Carrier Systems pervade all requirements of professional voice products in outstanding quality and high availability. Each system is custom built and configured according to the technical, administrational and local regulatory requirements.

An Aarenet Carrier System consists of the Aarenet Core System (anSwitch), a Firewall or a Session Border Controller (SBC) and auxiliary devices such as a provisioning or UCC systems. The connection to the PSTN (Public Switched Telephone Network) is realised over SIP trunks or SS7 gateways. The customer premise equipment (CPE) is connected over broadband IP either directly (in the case of IP-phones or soft clients) or indirectly with gateways as in the case of legacy equipment such as analogue phones or ISDN equipment. The integration with OSS/BSS Systems (Operations Support System and Business Support System) is realised seamlessly via an extent set of provisioning tools (REST) and Call Control (CSTA) API.

Each System is delivered with the Aarenet multi layer defence protection to protect the system and to prevent the system to be accessed by unauthorized users.


Aarenet Carrier System support Class 4, Class 5 and CloudPBX functionality. The modular and feature rich design allows an optimal adaptation to customer requirements. Fully redundant and very robust carrier grade systems for SIP clients include an Active-Active architecture, to scale up and support large number of clients and contemporary calls. The architecture is prepared and compliant to operate in a geo-redundant system setup.

Class 4

An Aarenet Class 4 System is a powerful, flexible and reliable solution whose primary role is to manage voice transit traffic, deliver carrier interconnection services and grant PSTN access to serve end-customer and end-user application via Class 5 and CloudPBX Softswitches.

Aarenet Class 4 Systems offers high-level routing capabilities and SIP Messages manipulations as well as a powerful configuration API for dynamic call routing (LCR).

Multiple PSTN Interconnections can be realized by configuring direct SIP Gateways or via 3rd Party SS7/TDM Gateways towards the PSTN. Interconnection, an easy management and call flow optimization is handled by features like Priority Routing, Percentage Routing, LNP Routing, SIP Header Routing, LCR, fallback routing and others. 

Active Fraud Protection, whitelist-black list, Traffic Shaping and customized peer authentication delivers a high-level of security even for Class 4 services.

Aarenet Class 4 System is equipped with embedded SBC functionality, such as Topology Hiding, SIP Header Manipulation, Qos, Load Sharing and Codec Transcoding. The system can route media directly in-between the interconnection carrier peers, minimizing the required resources. Alternatively, it can automatically terminate RTP traffic and thanks to the native codec transcoding functionality, supports the majority of contemporary needed VoIP codecs (g711, g722, g723, g726, g729, iLBC, Opus, GMS, T.38, etc) and  makes VoIP networks normalization and interoperability effortless and straightforward.

Thanks to its modular architecture, the Aarenet Class 4 System can scale up from a few hundred to several tens of thousands of concurrent calls, sustaining the growth of customer with unchallenging deployment and swift execution.

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    Class 5

    An Aarenet System can be deployed as a Class 5 Softswitch to provide various types of end-customer access and offers both Residential and Business customers outstanding VoIP quality on the same system at the same time.

    Thanks to its extended capabilities and feature set, the Aarenet System provides a secure, scalable, robust and future proof solution to VoIP service operators.

    The multi-tenant architecture grants a high level of flexibility in deploying complex scenarios such as softswitch platform white-labeling and service reselling for system integrators. Multiple levels for tenants, groups and users help to optimize operation tasks and to create new, customized business offerings.

    Real-time rating capabilities and multiple customized pricelist definition fulfill the high billing requirements of our customers.

    TopStop call charge limitation, as part of the Aarenet active antifraud protection system, monitors in real-time the value of each and every active call on the system. Based on flexible and customizable thresholds, the system detects and actively cancels malicious calls that could potentially lead to high financial losses and dissatisfied customers.

    A Lawful Interception engine is embedded into the system and is compliant with the local laws.

    Due to its proven SIP device interoperability, given by the powerful normalization engine and native transcoding feature, through the provisioning APIs and the extensive support and monitoring tools, an Aarenet Class 5 Softswitch simplifies and accelerates end-customer deployment, migration and maintenance operations.

    CloudPBX

    The Aarenet CloudPBX is a fully virtualized, multi-tenant and high-availability CloudPBX solution that offers a feature-rich, scalable, and secure unified communications services for the End-users.  the CloudPBX enables Service Provider Customers to deliver a seamless experience for remote workers.

    Its feature set covers the needs of small, medium and large Enterprises: Advanced Call Distributions with queuing algorithm (Linear, Parallel, Random) and agents support, Enhanced Multi-level IVR (Interactive Voice Response) system, Multiple Timetables routing, Real-time billing, Fix to Mobile Convergence, Call-flip in between terminals and distinctive ringing are only a small number of the numerous features included in a simple licensing model.

    The Aarenet CloudPBX can be deployed as a stand-alone Enterprise PBX or as an application add-on for an existing Aarenet Carrier system anSwitch. The CloudPBX can scale up to 1 million extensions and on the system single CloudPBX instances can be created for small and large enterprises. Above and beyond the advanced PBX and UC functionalities, a set of application programming interfaces such as REST and Call Control which enable seamless integration to niche third-party applications is integrated.  Most noticeable, the new auto-provisioning toolkit module enables to include new SIP endpoints and delivers a zero-touch service orchestration without manual intervention.