What is the calls per second (CPS) limitation for Zentrunk SIP trunking?

Outbound Limitations

The calls-per-second limitation for Zentrunk SIP trunking is based on both account-level CPS and trunk-level CPS. The account-level CPS is the rate at which calls may be made from an account in a second, while the trunk-level CPS applies to each of the trunks individually in the account. 

Businesses can choose different ways to allocate their account-level CPS across trunks in their account.

Scenario 1:

A user has 25 account-level CPS and 3 trunks 

  • 2 trunks are set at 10 CPS (high-volume use cases)
  • 1 trunk is set at 5 CPS (low-volume use case)

Scenario 2:

A user has 10 account-level CPS and 10 trunks 

  • Each trunk has a CPS of 10
  • This allows for a “free-for-all” where if one trunk is consistently initiating calls at a rate of 10 CPS, calls from other trunks would fail

Note: You cannot exceed the account CPS limit even if you have multiple trunks in your account. If it exceeds, then calls will fail with the error “cps_limit_reached” and error code “5180.”

By default, the CPS for Zentrunk is set to two calls per second per account and one call per second per trunk. If you need higher CPS requirements, please contact our sales team. For help with technical issues related to Zentrunk, please submit a ticket with the Plivo support team.

Inbound Limitations

There are no calls-per-second constraints for inbound trunks in Zentrunk SIP trunking.

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