Loop Detection
Loop Detection refers to the ability on the switch side to detect looping and block calls based on the same ANI to the same DNIS within a specified timeframe.
- If the system detects a loop it will block the call for the same amount of time that the Loop Timer is set to.
- A CDR/SIP Reason “503 LOOP_BLOCKED” will be returned when a loop is detected.
- You will find the option that allows the time interval and repeat interval to be set in the Trunk Group settings on ingress traffic.
Examples:
- if you set 60 seconds in the Loop Timer and 10 calls in the Loop Occurence, the block will be set for that calling/called pair on the trunk group for 60 seconds. If the 11th call that comes in within the next 60 seconds would be blocked.
- If the timer is set at 30 seconds and your counter is set at 5, the system will accept 5 repetitive calls within 30 seconds but will block the 6th and subsequent calls.
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