CallUp Net Ltd., established in 1999 and headquartered in Rosh Haâ??ayin, Israel, is a subsidiary of the One1 Group (One Software Technologies), one of Israel's largest IT and software integration conglomerates. CallUp Net functions as a specialized provider of Value Added Services (VAS) and Mobile Device Management (MDM) solutions tailored for the global telecommunications sector. The company specializes in developing carrier-grade software platforms that enable Mobile Network Operators (MNOs), Mobile Virtual Network Operators (MVNOs), and service providers to enhance subscriber experience, manage network resources efficiently, and generate new revenue streams.
The company focuses on the intersection of "Mobility, Apps and Tech," bridging the gap between legacy telecommunications infrastructure and modern mobile applications. CallUp Net has a global footprint, with its systems deployed in dozens of mobile networks across Europe, Latin America, Africa, and the Middle East.
Primary Products and Services
CallUp Netâ??s portfolio is categorized into four strategic pillars: Messaging Infrastructure, Device and SIM Management, Roaming Solutions, and Value Added Services.
1. Messaging Infrastructure
CallUp Net provides high-performance messaging centers that form the backbone of mobile communication. These products are designed for high availability and massive scalability.
Short Message Service Center (SMSC): This is a carrier-grade platform designed to manage high volumes of SMS traffic. It supports standard protocols (SMPP, SIGTRAN) and offers advanced routing, filtering, and spam control features. It is built to handle the transition from traditional SMS to A2P (Application-to-Person) messaging, which is a significant growth area for operators.
Multimedia Messaging Service Center (MMSC): This platform allows the delivery of rich media content, including images, audio, and video. It includes transcoding capabilities to ensure that content is optimized for the specific screen resolution and technical specifications of the receiving handset.
IP Messaging Gateway: As networks migrate toward 5G and IMS architectures, CallUp Net provides gateways that bridge traditional cellular messaging with IP-based communication, ensuring seamless interoperability across different generations of network technology.
2. Device and SIM Management
One of CallUp Netâ??s core competencies is managing the lifecycle of mobile devices and SIM cards remotely through Over-the-Air (OTA) technology.
Mobile Device Management (MDM) / OTA: This solution automatically detects when a new SIM card is inserted into a mobile device. It then pushes the correct configuration settings (such as APN for data, MMS settings, and email configurations) to the device. This reduces the burden on customer support centers and improves the "first-time right" connectivity for subscribers.
SIM OTA Management: This platform allows operators to manage the files and applications residing on the SIM card itself. This includes updating the Preferred Roaming List (PRL), modifying the SPN (Service Provider Name), and managing security keys without requiring the user to swap physical hardware.
Remote File Management (RFM) and Remote Applet Management (RAM): These specialized tools allow for the granular management of SIM applets, which is crucial for banking applications, security protocols, and IoT (Internet of Things) deployments where physical access to the SIM is impossible.
3. Roaming and Mobility Solutions
CallUp Net provides tools that help operators manage their subscribers' experience when they are outside their home network, while also optimizing inter-operator costs.
Steering of Roaming (SoR): This system enables operators to direct their outbound roamers to preferred partner networks based on quality of service or wholesale pricing agreements. It utilizes both SS7 and Diameter signaling to ensure roamers attach to the most cost-effective and reliable network.
Welcome SMS and Roaming Info: This service automatically detects when a subscriber has landed in a foreign country and sends a localized "Welcome" message. This message typically includes information on roaming rates, local emergency numbers, and instructions for dialing back home.
Multi-IMSI Management: For MVNOs or specialized corporate accounts, CallUp Net offers Multi-IMSI solutions that allow a single SIM card to host multiple international mobile subscriber identities. This allows the device to act as a "local" device in multiple regions, drastically reducing roaming expenses.
4. Value Added Services (VAS) and Revenue Generation
These services are designed to increase the Average Revenue Per User (ARPU) and decrease churn by providing utility-based features.
USSD Gateway: Unstructured Supplementary Service Data (USSD) remains a vital tool for interactive services, especially in emerging markets. CallUp Netâ??s gateway allows operators to create menu-driven services for balance inquiries, prepaid top-ups, and service subscriptions that work on any mobile device without requiring a data plan.
Missed Call Alert (MCA) and Call Completion: These services notify subscribers via SMS about calls they missed while their phone was turned off or out of coverage. By facilitating a call-back, the operator generates additional billable minutes or messages.
Visual Voicemail: A modern take on traditional voicemail that allows users to see a list of their messages in a GUI-style interface on their smartphone, enabling them to listen to messages in any order.
Technical Integration and Market Approach
CallUp Net distinguishes itself through its flexibility in deployment. Its solutions are available as on-premises installations, virtualized instances, or cloud-based "Software as a Service" (SaaS) models. This flexibility is particularly attractive to MVNOs who require low entry costs and rapid time-to-market.
The companyâ??s architecture is designed to be vendor-agnostic, integrating with core network equipment from major providers like Ericsson, Nokia, and Huawei. By adhering to 3GPP and OMA (Open Mobile Alliance) standards, CallUp Net ensures that its products remain compatible with evolving network technologies, including the transition from 4G LTE to 5G Standalone (SA) architectures.
Furthermore, CallUp Net provides extensive professional services, including custom software development, system integration, and 24/7 technical support. This hands-on approach allows them to tailor their VAS and MDM offerings to the specific regulatory and market requirements of different geographical regions.
