Short answer
On-net minutes means calls that start and end on the same operator's network, often priced lower than off-net calls. VC minutes has no single meaning.
In detail: What are on-net minutes and VC minutes?
FirstNet bills calls per second, by destination type, so check how any provider defines and rates the minutes on a quote.
On-net and off-net: in general, an on-net call starts and ends on the same operator's network, while an off-net call crosses to another operator, such as a call from a business line to a mobile network. Many providers price on-net calls lower because no other network is involved. Calls between extensions on the same phone system usually stay inside the PBX and never reach the public network.
VC minutes: the term appears on some price lists and contracts, but providers do not use it consistently. If a quote or bill lists VC minutes, ask the provider to state in writing which calls count against them and how they are rated.
How FirstNet bills calls:
- Calls run on a voice plan: Voice Bundles with a fixed number of inclusive minutes, or Voice Rate Options with per-minute rates.
- Billing is per second, so short calls are not rounded up to full minutes.
- Local geographic, mobile, international and premium-rate destinations are rated differently.
- Calls reach Telkom, Vodacom, MTN, Cell C and other licensees through FirstNet's direct interconnects.
Because pricing depends on traffic volume, destination mix and routing requirements, FirstNet prepares a customised rate card from your call profile. Comparing rate cards destination by destination is a fairer test than comparing headline minute counts between providers.