SeRVE for
PSTN Replacement

Overcome the challenge of replacing and managing PSTN and ISDN services, with a fully compliant managed service from a voice partner who offers full PSTN replacement services in more countries than others and is up to 20x faster.

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Full PSTN Replacement Services

As ISDN and PSTN services are phased out around the world, migrating your enterprise telephony to SIP and cloud technologies is more important than ever.

Pure IP’s SeRVE for PSTN Replacement provides full-featured and fully compliant PSTN replacement services that includes guaranteed CLI (Caller Line Identity), emergency call features and the reachability to local services such as free phone numbers that are only available in region.

Connecting Your Business

Whether your business is interested in consolidating voice services to a single provider, integrating with a Unified Communications platform, or simply migrating away from legacy systems, take advantage of the operational and cost efficiencies of VoIP technology using SeRVE for PSTN Replacement.

Connect Hard to Reach Places

Connect your teams around the world with tailored Managed Services and solutions

Fully Compliant SIP as a Service

Eliminate the need to manage multiple regional carriers – our services are compliant with all in region legislation and tax requirements

Supporting you from the start

Our team of experts are available 24/7 to provide guidance and project management support for even the largest scale PSTN migrations


Global Coverage

Our geo-redundant network provides coverage in 137 countries, and full PSTN replacement in 50

Flexible Approach

Our team will design a solution from our range of Managed Services and technologies to suit your requirements and integrate with existing mixed telephony environments

No Unnecessary Hardware

Our cloud-based SIP infrastructure and fully compliant PSTN services reduces the need for on-premises hardware

How it Works


Explore & define

The journey starts with understanding what services you have and defining your business requirements. In some cases where full PSTN replacement services are not yet available, we will explore other technologies and options with you.



Using our cloud-based SIP Managed Service, we provision the necessary services for each region, including numbers, quickly and efficiently so that we can get your services live.



Once operational, your account will be assigned to our technical-led support team, who will keep your services under 24/7 monitoring and provide you with quick answers and support when needed. As a customer, you will have instant access to these voice engineers by phone, email, and support ticket.



Monitor and manage your voice services through your own personal customer portal, where you can gain insight into trends in usage, review your invoices, and order new services.

What is included in SeRVE

Global voice network

Global voice network

Strength, scale, and reach
  • Coverage in 137 countries, with fully compliant PSTN replacement in 50
  • Pure IP owned infrastructure with geo-redundancy built around 12 data centers
  • Platform neutral for consolidating services in mixed or multinational environments
Managed Services

Managed Services

Speed, flexibility, and expertise
  • Rapid deployment & porting
  • Capacity overdraft facility
  • Proactive service monitoring and alerts
  • 24/7 engineer led customer service and support
  • PSTN Migration services
Management Hub

Management Hub

Insights, access, control
  • Utilization based pricing – only pay for what you use and need
  • Analytics and management information
  • Billing flexibility
  • Self-service portal