Short answer: When all outbound lines (concurrency) are in use, new calls queue (if enabled) or wait until a line frees up. You can increase capacity, optimize scheduling, or fallback to other channels.
When all available outbound lines are busy, additional calls can’t start immediately. Depending on your campaign settings, MyOperator will queue the call to try again automatically, or you may see “no lines available” and need to adjust capacity or timing.
Why this matters
Situation | What to do (now) |
Occasional peaks | Turn Queueing ON + set Retry spacing (15–30m) |
Frequent “no lines” | Increase concurrency (add lines/upgrade) |
Tight windows (e.g., 6–8 pm) | Stagger schedules; spread attempts across time blocks |
Urgent contacts pending | Prioritize critical lists; defer low-priority |
Long waits in the queue | Enable Callback or SMS fallback after the last attempt |
Term | Meaning | Tip |
Line / Channel | A single simultaneous outbound call slot | More lines = more parallel calls |
Concurrency | Total simultaneous calls allowed | Often set at account or campaign level |
Queue | Holding area for calls until a line frees | Use sensible queue wait and retry spacing |
Throttle / Pace | Rate of launching calls per minute | Prevents bursts that exceed capacity |
Window | Time range when calling is permitted | Respect local quiet-hour rules |
✅ Success check: After publishing, peaks should queue instead of failing, and average wait to first attempt stays within your target (e.g., < 10 minutes).
Input | Example | How to use it |
Max lines | 40 lines | Upper bound for simultaneous calls |
Avg call duration | 2.5 min | Drives how fast lines free up |
Target attempts/hr | 700 | Ensure throttle ≤ lines × (60 / duration) |
Safe launch rate | 40 × (60/2.5) = 960 cph | Start at 70–80% of this (≈ 700–770 cph) |
Peak window | 18:00–20:00 | Consider staggering or extra lines |
💡 Rule of thumb: Start at ~75% of theoretical max. Increase gradually while monitoring queue length and abandon.
You should see:
Where to check
Topic | Note |
Quiet hours | System won’t dial outside the configured window |
Shared lines | Competing campaigns can consume the same pool |
Agent-bridging | If agents are required, agent availability can be the bottleneck |
Long calls | High AHT reduces turnover; lower throttle or add lines |
Compliance | Respect DND/opt-out; cap max touches per contact |
Data quality | Bad numbers inflate retries and waste lines |
Symptom | Likely cause | Fix | Where to verify |
Frequent “no lines available” | Concurrency too low | Increase lines or reduce throttle | Settings → Lines/Concurrency; Campaign → Pacing |
Long queue wait (>15m) | Overlapping campaigns | Stagger schedules; set priorities | Campaign calendars; Queue metrics |
Calls launching in bursts | No throttle/pacing | Set calls/min aligned to capacity | Campaign → Advanced/Pacing |
Calls outside hours | Window/time zone off | Correct window/time zone | Campaign → Schedule |
Many short failed attempts | Bad list quality | Clean list; suppress unreachable | CDR; List hygiene tools |
Agent misses many | No overflow/wrap-up | Enable overflow; add wrap-up | Agent/Queue Settings |
Q1. Does queueing guarantee calls will be placed?
A. If capacity frees within your calling window and queue wait policy, queued calls will launch; otherwise, they’ll expire per your rules.
Q2. Will increasing lines always fix this?
A. It helps, but also tune throttle, window, and list quality for best results.
Q3. Can I prioritize urgent contacts?
A. Yes—use campaign priority or split lists and schedule critical ones first.
Q4. What about regions with strict quiet hours?
A. The system won’t dial outside configured hours; expand the window or spread attempts across more days.
Q5. How do I know my throttle is right?
A. If queue length stays low and abandon doesn’t rise, you’re close; otherwise, reduce calls/min or add lines.
If issues persist after troubleshooting:
Include: account ID, campaign name/ID, current concurrency, time window, throttle, sample call timestamps, and “expected vs actual.”
FAQPage
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{ "@context": "https://schema.org", "@type": "HowTo", "name": "Configure capacity and queueing to avoid 'no lines available' in MyOperator", "step": [ { "@type": "HowToStep", "text": "Open Outbound → Settings → Lines/Concurrency and note your max concurrent calls." }, { "@type": "HowToStep", "text": "Outbound → Campaigns → [Campaign] → Settings → Schedule & Retries: turn Queueing ON, set retry spacing 15–30 minutes, max attempts 2–3, and daily calling window." }, { "@type": "HowToStep", "text": "Set Advanced/Pacing calls per minute to a safe rate (about 70–80% of theoretical capacity)." }, { "@type": "HowToStep", "text": "Stagger campaign schedules and prioritize critical lists to reduce overlap." }, { "@type": "HowToStep", "text": "If peaks persist, increase lines in Outbound → Settings → Lines/Concurrency, then monitor Logs and Capacity reports." } ]}MyOperator outbound lines, no lines available, outbound dialer concurrency, OBD queueing, call pacing, throttle, retry spacing, campaign scheduling window, increase concurrent lines, capacity planning, peak hours, call logs, CDR, capacity report, queue length, agent wrap-up, overflow queue, agent availability, quiet hours, DND, opt-out, compliance, callback, SMS fallback, multi-channel fallback, line capacity, concurrent calls, line pool, launch rate, abandoned calls, unreachable, busy tone, answer rate, time zone policy, max touches, reschedule, priority lists