Outline — full article in progress
This page has the structure and introduction. The full article is being written by the network team. In the meantime, ask us directly.
Buy too few SIP channels and callers hear busy signals at peak time; buy too many and you pay for capacity you never use (if your provider charges per channel at all). This article explains busy-hour traffic, the Erlang B formula and a worked example you can adapt to your own call volumes.