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SINCH VOICE

Network SIP trunking on a Tier-1 network Sinch owns and operates

Most SIP trunking providers resell capacity from underlying carriers. Your call leaves their network and crosses infrastructure they don’t control — with quality and accountability gaps at every handoff. Network SIP trunking from Sinch runs on a privately owned, all-IP Tier-1 network. Carrier-grade reliability, built-in security, and a 99.99% uptime SLA. 

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BUSINESS OUTCOMES

Retire legacy circuits, consolidate voice vendors, and stay online through outages

PRI and ISDN circuits are fixed-capacity, hardware-dependent, and expensive to change. Network SIP trunking from Sinch replaces them with managed IP-based voice connectivity on a network built for enterprise scale.

  • No more PRI circuit orders or on-site hardware upgrades. Replace fixed-capacity circuits with a managed voice service that adapts to your business.

  • Fewer vendors, less complexity. Consolidate voice services under one relationship.

  • SLA-backed quality. The 99.99% uptime SLA covers call completion and answer-seizure ratio — not just network availability.

  • Geo-redundant by design. Traffic reroutes automatically between Points of Presence to maintain service during an outage.

  • 24/7 NOC monitoring. Sinch’s network operations center watches call quality around the clock. 

TIER-1 NETWORK

Voice quality starts with the network, and Sinch owns every mile of it

Most SIP trunking providers resell capacity from underlying carriers. Every handoff is an opportunity for quality to degrade — and a gap in accountability when it does.

Sinch Network SIP trunking runs on a Tier-1 all-IP network that Sinch owns and operates. The network spans 95% of the U.S. population and carries over 300 billion minutes of voice traffic a year — one of the largest independent voice networks in North America. International reach extends to 60+ countries.

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CONTROL AND VISIBILITY

Provision numbers, manage capacity, and see every call from one console

Most voice platforms still route provisioning through support tickets and batch reports. IQ Control replaces both with a single console for network and UC teams.

  • Real-time number provisioning

  • Number porting

  • Capacity management

  • Call analytics and reporting

  • Intelligent routing for cost, quality, and security

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SECURITY

Stop toll fraud, authenticate every call, and keep every packet encrypted

Toll fraud is a persistent cost for enterprises, and most carriers sell protection as a bolt-on service.

Sinch takes a different approach. Proactive toll fraud detection, STIR/SHAKEN call authentication, and TLS signaling with SRTP media encryption ship with the service. SOC 2 Type II and HIPAA certifications carry over from the underlying Sinch Voice network. 

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USE CASES

Where network SIP trunking earns its keep

Legacy PRI and ISDN replacement

Modernize voice infrastructure by replacing traditional, fixed-capacity phone lines.

Unified Communications

Provide external voice connectivity for Microsoft Teams Direct Routing, Cisco UCM, Avaya Aura, and other UC platforms.

Contact center voice

Deliver high-capacity, reliable voice service for inbound and outbound CCaaS platforms.

Global market expansion

Establish local voice presence in new international markets without deploying local hardware.

CAPABILITIES

Every capability a global voice platform needs to operate at enterprise scale

Tier-1 privately owned network

Voice traffic is carried on a privately owned and operated all-IP network for superior quality and reliability.

SLA-backed call quality

Service Level Agreements cover key voice quality metrics like uptime, call completion, and answer-seizure ratio.

Geo-redundant routing

Automatically reroute traffic between multiple Points of Presence to maintain service during an outage.

STIR/SHAKEN authentication

Call authentication verifies caller identity at the network level.

TLS and SRTP encryption

Secure signaling (TLS) and media (SRTP) encryption protect against unauthorized access.

Proactive toll fraud detection

Proactive monitoring and blocking of suspicious calling patterns, with customizable call restrictions.

Control portal

A single interface for real-time number provisioning, porting, capacity management, and call analytics. Intelligent routing optimizes cost, quality, and security.

Certified UC integrations

Certified integrations for Microsoft Teams Direct Routing, Cisco UCM, and Avaya Aura. Standard SIP compatibility for other UC and CCaaS platforms.

Emergency services (E911)

Simplified and robust management of emergency calling registration and routing.

SOC 2 Type II and HIPAA

Core certifications inherited from the underlying Sinch Voice network.

GET STARTED

From first conversation to first call on the network

  • Talk to the Sinch team. Sinch scopes your coverage, capacity, and integration requirements based on your architecture.

  • Confirm your prerequisites. You need a SIP-capable IP-PBX, CCaaS platform, or certified Session Border Controller, plus a stable business-grade internet connection.

  • Configure your platform. Sinch provides certified integrations for Microsoft Teams Direct Routing, Cisco, and Avaya. Standard SIP supports other platforms.

  • Port or provision your numbers. IQ Control handles number porting and provisioning from one console.

  • Go live. Traffic moves onto the Sinch Tier-1 network with SLAs covering uptime, call completion, and answer-seizure ratio. 

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FAQ

Common questions about network SIP trunking

Network SIP trunking connects a customer’s communications platform — on-premise or cloud-based — to the public phone network over IP, replacing legacy circuits like PRI or ISDN. Sinch’s service is operator-managed: provisioning, routing, and support are handled by a dedicated Sinch team.

PRI and ISDN are fixed-capacity circuits tied to physical hardware. Network SIP trunking runs over IP, eliminates on-site circuit hardware, and is backed by SLA-covered quality metrics — all managed through a single portal and vendor relationship.

Sinch owns and operates its Tier-1 network. The network carries over 300 billion minutes of voice a year. A 99.99% uptime SLA covers call completion and answer-seizure ratio. Private dedicated connections via MPLS or direct peering are available for performance-sensitive deployments.

Yes. Sinch is Microsoft Operator Connect certified, which provides a streamlined provisioning path for Teams voice connectivity. Standard SIP is also supported for other UC and CCaaS platforms.

Proactive fraud monitoring, customizable call restrictions, STIR/SHAKEN call authentication, and TLS/SRTP encryption are all included with the service — not sold as add-ons.

Network SIP trunking inherits SOC 2 Type II and HIPAA certifications from the underlying Sinch Voice network. STIR/SHAKEN and E911 compliance are built into the service.

A SIP-capable phone system — IP-PBX, CCaaS platform, or certified Session Border Controller — and a stable business-grade internet connection. MPLS, VPN, and direct peering are also available for customers with additional security or performance requirements.

Yes. The Sinch network extends to 60+ countries. Coverage and commercial terms vary by market — talk to the Sinch team to scope your international requirements.