Scaling Concurrent Calls on a Freephone Number

How many free calls your 0800 or 0808 number can carry at once depends on the SIP lines on your FreeVoIP account.

A free account includes two SIP lines. A Freephone number promoted on advertising can spike hard, so many businesses step up to the 25-line SIP account at £25/month for 25 simultaneous channels plus IVR, queues and routing.

Size your line count to the busiest minute a campaign might generate, and route overflow into a call queue so extra callers wait with music on hold rather than getting a busy tone. The Freephone number stays the same — you just widen the capacity behind it.