After-Hours Call Routing
Never miss a critical customer call. SIGNL4 automatically routes after-hours calls to on-call staff β ensuring timely response and 24/7 coverage.
- RTrusted by 1,000+ customers worldwide
- RBuilt for enterprise-class security and data privacy
- RFully operational in under 5 minutes
How It Works
What is SIGNL4?
SIGNL4 is your call routing solution that ensures critical after-hours calls are delivered directly to the right on-call staff. It supports both live call forwarding and voicemail-based alerting.
Customers or team members dial a dedicated number, and SIGNL4 automatically routes the call to the appropriate on-call engineer. If no one picks up, the system records a voicemail and immediately triggers a mobile alert β ensuring your request gets the attention it needs, quickly and reliably.


Call Routing
SIGNL4 provides a dedicated phone number for customers or internal teams to reach your organization after hours. Incoming calls are automatically routed to the on-call staff β ensuring real-time connection with an available team member when it matters most.
Voicemail Alerting
When no one is available to take a live call, SIGNL4 captures the message and instantly alerts the on-call team. Voice recordings are delivered directly to the mobile app, where staff can listen and respond β ensuring no request goes unanswered, even outside business hours.


Scheduling Built In
On-Call Scheduling Made Simple
SIGNL4 includes intuitive, built-in on-call scheduling that makes it easy to manage availability across your team. Create, update, and view duty schedules right from your browser β and ensure that calls and voicemail alerts are always routed to the right person at the right time.
Why SIGNL4?
Benefits
SIGNL4 is a robust and reliable solution for any 24/7 service desk hotline supported by on-call or standby teams. It reduces the load on your operations staff by eliminating unnecessary direct calls, while ensuring that no important customer request goes unanswered.
By alerting the right person at the right time, SIGNL4 helps teams work through issues based on severity, streamline response efforts, and avoid burnout. The result? Faster resolutions, improved customer satisfaction, and a far better after-hours experience for your team.

A proven solution
1000+ Customers worldwide


































“We’ve been using SIGNL4 for a few months now, and it is making a real difference in our response times. We have tiedΒ it to our help desk IVR for after-hours support and have experienced the results we had hoped for. Highly recommended!”
Next Steps
Learn more about SIGNL4 and start your free 30-days trial
Summary
SIGNL4βs After-Hours Call Routing ensures critical calls never go unanswered β even when your team is off the clock. Calls are automatically routed to the appropriate on-call staff, and if no one is available, a voicemail is recorded and instantly triggers a mobile alert through the SIGNL4 app.
With built-in on-call scheduling, teams can easily manage availability and shift coverage. The result? Faster response times, reduced operational stress, and higher customer satisfaction β even outside regular business hours. SIGNL4 is secure, easy to implement, and trusted by organizations worldwide to keep service levels high around the clock.