Trunking Termination Calls per Second (CPS) refers to how many new SIP Trunking call setups are allowed in one second for Trunking Termination calls (outgoing traffic from your communications infrastructure to the PSTN). Twilio, by default, provides the ability for you to place 1 CPS per Trunk per Region (see limits).
With this release you are now able to set the Trunk CPS between 1 and 15 per region. This release will show the pricing changes as well. In addition, it is possible to schedule the effective date in advance when decreasing your Trunk CPS.
For details, please check our Trunk CPS documentation.