Each Edesy termination trunk has a max concurrent calls setting, from 1 to 10,000, with a default of 50. It caps how many calls the trunk carries at the same time. When a new outbound call would go over a limit, Edesy declines it at the SIP layer with a clear response code, so your PBX or platform can retry or fail over.

Set the limit#

In the portal, set Max concurrent calls when you create the trunk, or change it later from the trunk page. With the API:

curl -X PATCH https://voice-api.edesy.in/v1/trunks/TRUNK_ID \
  -H "Authorization: Bearer sk_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"max_concurrent_calls": 100}'

Match it to the channel count on your side. In FreePBX, set the trunk's Maximum Channels to the same value.

Limits that can decline a call#

Limit	SIP response	What to do
Workspace concurrent calls reached	`503 Channel Limit Reached`	Wait for calls to end, or ask support to raise your allowance
Workspace call rate (new calls per second) reached	`503 Call Rate Limit Exceeded`	Pace new calls, or ask support for a higher rate
Wallet cannot cover the call	`402 Payment Required`	Top up the wallet
Caller ID not owned by you	`403 Caller ID Not Authorized`	Send an Edesy number you own as `From`
No destination number	`400 Missing Destination`	Put the dialled number in the Request-URI

All of these happen before the call is placed, so a declined call costs nothing. See Common SIP Response Codes for the full list.

Suspend a trunk#

Set status to suspended to stop a trunk without deleting it, and back to active to resume:

curl -X PATCH https://voice-api.edesy.in/v1/trunks/TRUNK_ID \
  -H "Authorization: Bearer sk_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"status": "suspended"}'

Test calls are disabled while a trunk is suspended.

FAQ#

Does an inbound call count toward my concurrent calls?#

Inbound calls are counted toward the workspace total but are never declined for it. A busy inbound period can therefore cause new outbound calls to get 503 Channel Limit Reached.

Is there a charge for a higher channel limit?#

The per-trunk cap is free to change. For a higher workspace-wide allowance, contact us.

Why do my calls stop at 50?#

50 is the default per-trunk cap. Raise max_concurrent_calls on the trunk.

Do test calls count toward the limits?#

Test calls from the portal are exempt from the channel limits, but are limited to 5 per hour per workspace.