As legacy PSTN and ISDN networks are phased out worldwide, enterprises need a reliable solution to maintain voice services during and after migration. Epsilon’s Global PSTN Replacement solution offers a turnkey approach for modern communications with global coverage, regulatory compliance, and carrier-grade quality.
Global PSTN Replacement
Modernise Your Global Network with Two-way Voice DIDs
Transition to a future-ready, IP-based voice network with seamless number provisioning, enhanced emergency support, and reliable local termination.
Download Global PSTN Replacement Data SheetSimplified Global Communications
Streamline your voice setup with one provider, eliminating the need for multiple suppliers globally.
Crystal-clear Voice Quality
Deliver premium call performance with high reliability and, plus innovative features to your customers.
Fast, Self-service Procurement
Quickly acquire and manage numbers through an automated, user-friendly portal.
Regulatory Compliance and Reach
Support emergency services in 55+ countries over a secure, carrier-grade network.
Scalability and Future-ready
Scale effortlessly with adaptable pricing models to meet changing needs.
Seamless Global Connectivity
Connect users worldwide with consistent service quality and local number presence.
HOW IT WORKS
Built for Quality and Scale
Epsilon utilises Session Border Controllers (SBCs) to establish calls across our MPLS based IP network using Quality of Service to ensure call quality. These SBCs are resilient and located in Europe, APAC and North America
Features
- Direct on-net/off-net termination
- Numeric sender ID (Alpha-numeric not allowed)
- Sender ID registration not required; sender ID cannot be modified and is delivered as is
- Portal-driven number ordering via Infiny
- API interworking for seamless third-party integration
- Local number portability
- Single interconnect point
- Intelligent routing features
- Geographic, toll-free, and premium rate numbers
- Low jitter and maximum call quality-of-service
Our Global Reach
We provide two-way voice DIDs in 75+ countries. Expand your global presence with local, national, mobile, and toll-free numbers in 140+ countries – all from a single provider.
USE CASES
Enabling Global Voice Communications for Enterprises
Epsilon’s Global PSTN Replacement solution offers enterprises a seamless transition from legacy voice systems to modern, IP-based telephony across multiple countries. With local numbers, regulatory compliance, and high-quality voice services, businesses can centralise their voice infrastructure while supporting local presence and emergency calling.
Discover how Epsilon’s PSTN Replacement helps businesses simplify operations, reduce costs, and deliver consistent voice experiences across regions.
Simplifying Voice Infrastructure
Need to consolidate fragmented voice systems across regions?
Epsilon’s PSTN Replacement enables global businesses to migrate to a single, cloud-based voice architecture. By replacing traditional telephony with SIP-based voice services, enterprises can eliminate local PBXs, streamline operations, and reduce maintenance costs. This centralised model supports both inbound and outbound calling while meeting regional regulatory requirements.
Ensuring Local Presence and Compliance
Looking to establish a local presence with full regulatory support?
With access to local numbers and emergency calling across 55+ countries, Epsilon allows enterprises to maintain a local footprint without physical offices. Our solution ensures compliance with local telecom regulations, including lawful intercept and local address registration, enabling you to deliver voice services tailored to each market while managing them from a single platform.
Enabling Global Two-Way Calling
Need to deliver full voice functionality across global markets?
Epsilon’s PSTN Replacement offers two-way calling in 75 countries, giving users access to local numbers with both inbound and outbound calling capabilities. Whether on desk phones, softphones or mobile apps, enterprises can provide a consistent voice experience across regions with carrier-grade performance and integrated service delivery.
Meeting Emergency Calling Regulations
Need to support emergency services while staying compliant?
Epsilon enables emergency call routing and location reporting in accordance with regulatory requirements. Available where permitted by local regulators, our PSTN Replacement ensures critical calls are delivered securely and reliably – helping enterprises meet legal obligations while protecting end-users.
Supporting Hybrid Work and UCaaS Integration
Need voice services that support remote teams and cloud communications?
Epsilon’s PSTN Replacement integrates seamlessly with leading Unified Communications platforms such as Microsoft Team, Zoom phone or Webex. This enables enterprises to deliver consistent voice capabilities to remote and hybrid workers, supporting global collaboration and mobility. With high availability, voice quality, and geographic coverage, businesses can ensure uninterrupted voice connectivity for their workforce—wherever they are.
Global PSTN Replacement
Ready to scale your global voice reach with Global PSTN Replacement?
Talk to an ExpertFrequently Asked Questions
1. What is PSTN Replacement?
PSTN Replacement is a cloud-based voice service that replaces traditional public switched telephone networks (PSTN) with modern IP-based telephony. It delivers carrier-grade voice capabilities with local numbers, regulatory compliance, and emergency call access — all without the need for physical infrastructure.
2. Is PSTN Replacement the same as VoIP?
PSTN Replacement uses VoIP technology, but goes beyond it by offering enterprise-grade reliability, regulatory compliance, local number provisioning, and emergency services support. It’s designed for businesses that need more than just internet-based calling.
3. What are the benefits of PSTN Replacement?
It offers cost-effective scalability, high voice quality, and global reach. Businesses benefit from local number availability in 140+ countries, simplified infrastructure, and improved operational efficiency by consolidating voice services through a single provider.
4. What signalling and protocols are supported?
We support the following protocols on IP Interconnect: SIP, RTP, RTCP, IPSec, NAT, RFC 3261 SIP.
5. What voice codecs are supported?
We support G.711, 723, 729, iLBC, OPUS, SILK, AMR WB and G.722, and more.
6. Is global PSTN replacement supported across multiple countries?
Yes, Epsilon provides PSTN replacement service across 55 countries and inbound/outbound services to 75 countries.
7. Can I port existing phone numbers into the PSTN Replacement service?
Yes, number portability is supported, allowing you to retain existing numbers when migrating to our PSTN Replacement solution for a seamless transition.
8. Is emergency number calling supported?
Yes, emergency services calls are supported in 55 countries.
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