Scaling Concurrent Calls on Your 03 Number

How many calls your 03 number can take at once depends on the SIP lines on your FreeVoIP account.

A free account includes two SIP lines. As a national number tends to attract higher volumes, many businesses move up to the 25-line SIP account at £25/month, giving 25 simultaneous channels plus IVR, queues and routing.

The 03 number stays the same — you simply add capacity underneath. Match your line count to the busiest minute you'd expect, and route any overflow into a call queue so callers wait in line with music on hold rather than hitting a busy tone.