Moving off legacy ISDN or a bundled telco contract? In 2026 most Norwegian SMBs start with a SIP trunk — but not all trunks are equal. Before you sign, run through this checklist.

Channels are concurrent call paths, not user seats. A 10-person office with two reception lines typically needs 4–6 channels, not 10. Oversizing wastes money; undersizing means busy signals during peak hours.

Norwegian DIDs (phone numbers) matter for local trust. Confirm your provider offers +47 numbers, number porting from Telenor or Telia, and whether geographic numbers (e.g. 53 for Bergen) are available.

Uptime SLA should be contractual, not marketing copy. Ask for 99.9% minimum, documented failover, and what happens when their upstream carrier has an outage.

Codec and QoS: G.711 for quality, G.729 if bandwidth is tight. Ensure your firewall allows SIP ALG disabled and the provider supports TLS/SRTP if you handle sensitive calls.

Pricing models vary: per-channel monthly, per-minute outbound, or bundled minute packs. For mostly inbound support lines, per-channel wins. For sales teams dialling out, model your minute usage first.

VoiShop Pro's SIP Trunk Starter includes 5 channels and 1 Norwegian DID from 299 NOK/mo — a sensible entry point for teams testing VoIP before a full office rollout.