SIP Trunking Services

SIP trunking providers deliver SIP trunk services connecting business phone systems to the PSTN for calling.

With businesses needing SIP trunks for VoIP and PRI replacement common, SIP trunking generates revenue of $130,000-$460,000 with 50-70% margins through monthly recurring revenue.

The business requires SIP trunking platform or carrier partnership, VoIP and SIP expertise, DID and number management, carrier interconnection and redundancy, and technical support capability.

Services include SIP trunk service with concurrent calls, local and toll-free DID numbers, outbound and inbound calling, E911 and emergency services, carrier redundancy and failover, and porting and number management.

Revenue through monthly SIP trunk subscriptions.

Success factors include reliable SIP trunk platform and carriers, competitive per-minute or unlimited pricing, carrier redundancy and uptime, technical support for SIP configuration, and serving businesses and VoIP providers.

Marketing focuses on businesses with VoIP phone systems, PBX replacement, VoIP service providers, and IT services companies.

With SIP trunks essential for business VoIP and PRI declining in 2025, SIP trunking offers carrier services opportunities serving telephony with platform reliability and pricing as differentiators.