Failover¶
Document Metadata
Category: Carrier Management / Fail-over & Redundancy Configuration
Audience: Administrators, Engineers, Support Team
Difficulty: Intermediate to Advanced
Time Required: Approximately 1–2 hours
Prerequisites: Active ConnexCS account with Carrier-module access; understanding of SIP routing, carrier fail-over strategies, and rate-card sequencing
Related Topics: Carrier Main Configuration, Reply Management
Next Steps: Define fail-over settings for carriers (including alternative IPs or backup carriers), configure sequential fail-over logic per SIP response codes, test fail-over via real-call scenarios, and monitor using fail-over logs
Management Carrier Failover
Overview¶
The Failover tab lists calls that failed with this carrier but connected with another carrier.
This typically helps to troubleshoot an issue with the carrier that's failing the calls.
You can also use this to identify FAS (False Answer Supervision) billing fraud.
False Answer Supervision (FAS)¶
1. What is FAS?
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A fraudulent practice where a carrier connects a call to an unintended destination (e.g., a radio message or a low-cost number) instead of the intended recipient.
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The caller is charged, but the carrier avoids paying termination fees.
2. How FAS Affects Failover Reporting?
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Calls that appear in the failover list may include fraudulent connections from a carrier utilizing FAS.
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Carrier A may falsely report calls as successfully connected when they weren't genuinely completed.
ConnexCS will halt routing on the following codes
3XX(Re-write to 503)486480404