Pagination controls how much of your historical data you pull back at once, but the limit that actually affects live traffic is concurrency — how many calls can be active at the same time.
Every Sulus account includes 10 concurrent call slots by default. When you create a call with POST /call, the response includes a subscriptionLimits object you can check to see how close you are to that limit:
{
"subscriptionLimits": {
"concurrencyBlocked": false,
"concurrencyLimit": 10,
"remainingConcurrentCalls": 9
}
}
| Field | Description |
|---|
concurrencyBlocked | true if the call could not start because all slots were full |
concurrencyLimit | Total concurrent call slots available to your organization |
remainingConcurrentCalls | How many slots were open at the time the call was created |
You can increase your concurrency limit directly from the dashboard under Settings → Billing → Reserved Concurrency (Call Lines), without contacting support.
For the full picture on default limits, batching strategies for large outbound campaigns, and monitoring usage historically, see the Call Concurrency Limits page — this page only covers the pagination parameters and the concurrency response fields relevant to the API itself.
