Solutions
Cyber Security
Cloud Security
DevSecOps Automation
Cyber Threat Intelligence
AI & MLOps Integration
Security Operations
Incident Response & Forensics
Services
Cloud Architecture & Migration
Zero Trust & IAM Solutions
SOC-as-a-Service
Threat Detection & Response
DevOps Infrastructure Design
Penetration Testing & Red Teaming
AI-Driven Security Analytics
Industries
FinTech Cybersecurity
Healthcare Cybersecurity
E-Commerce Security
Government & Defense Security
Telecom & IoT Security
Managed Security Services
24×7 Managed SOC
Managed SIEM & SOAR
Endpoint Detection & Response
Vulnerability Management
Cloud & App Security Monitoring
Compliance Management
AI Security Lab
AI-Driven Threat Defense
Neural SOC Platform
Predictive Attack Modeling
Security Data Lake
Research & AI Lab
Threat Intelligence Reports
AI Security Models
Machine Learning for Cyber Defense
Open-Source Tools
Publications & Whitepapers
AI Innovation Center
AI Research & Development
Generative Security Models
Autonomous Threat Simulation
LLM Security Framework
Future Technology Roadmaps
Global Threat Observatory
Global Cyber Threat Map
Real-Time Attack Feed
Regional Threat Reports
Zero-Day Tracker & Alerts
AI Risk Index Dashboard
Resources
Technical Insights & Advisory
Case Studies & Solution Workshops
Security Guides & Readiness Resources
Technical Workshops & Team Enablement
Knowledge Base & Operational DocumentationWhy Do VoIP Calls Ring on a Desk Phone but Not in the Mobile App?
A user may receive calls on a desk phone while the companion mobile app stays silent. The devices can have different registration status, notification permission, network reachability, call routing, or do-not-disturb settings.
What to check
Check the app account and extension, push notification permission, battery restrictions, Wi-Fi and mobile data behavior, presence status, and simultaneous-ring rules. Compare one test call on and off the corporate network and note whether the app is registered.
Recommended next step
Correct the failing layer and confirm the mobile app remains reachable after it is backgrounded. Review the organization’s mobile access and caller privacy policies before enabling additional devices.
How Informatix Systems can help
Informatix Systems provides VoIP and business communications services. We can review the affected workflow, identify the likely failure point, and help plan a practical fix based on your environment. Contact us with the system involved, when the issue began, and any non-sensitive error details.