VICIPanel
Troubleshooting/Carrier trunk at capacity
CriticalCarrier

Carrier trunk at capacity

Outbound calls fail because your SIP trunk has hit the carrier's concurrent channel limit.

Symptoms

  • •Outbound calls return 503 or 486 errors
  • •Dialer throughput plateaus regardless of agent availability
  • •Asterisk log shows `All circuits busy now` or similar

Common causes

  • •Agent + channel count exceeds purchased trunk capacity
  • •Carrier rate-limited your trunk after unusual traffic
  • •Registration broken, only a subset of channels available
  • •Second facility or dev environment stealing the trunk

How to fix it

  1. 1
    Check `sip show peers`, the peer status will show current channels used
  2. 2
    Compare to carrier-purchased capacity; contact carrier to increase if at limit
  3. 3
    Verify `qualify=yes` and that registration is current (`sip show registry`)
  4. 4
    Ensure only one system is registering against each trunk credential
Carrier health and operational view in VICIPanel
How VICIPanel helps

VICIPanel's carrier dashboard shows live channel utilization per trunk, you see the trunk hit 80% of capacity before calls start failing.

Related issues

More Carrier errors

SIP trunk registration failed

Your SIP trunk is not registered with the carrier, no outbound calls can be placed.

Caller ID not set, outbound calls show as unknown

Outbound calls connect but the recipient's phone shows 'Unknown' or a generic number.

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