elfo / Voice Service

Enterprise-Grade VoIP Solutions Built on 10+ Years of Telecom Expertise​

elfo empowers call centers, SaaS platforms, carriers, and global businesses with high-performance voice infrastructure. We deliver reliable CLI and Non-CLI routes tailored to your business needs. Here are our commitments:

99.8%
Uptime
SLA

Premium Global Routes CC, CLI and NCLI

24/7 Network Operations Center

Free Test
Account
Available

Strictly Prohibit Fraud

VoIP Common Use Cases

VoIP refers to international voice calling services that allow businesses (or individuals) to make and receive phone calls across countries using telecom carriers or VoIP infrastructure. VoIP use cases including:
International calls

Call centers & BPOs

OTP / verification calls
Customer support & sales campaigns 

Our Core Voice Services

SIP Trunking

(Wholesale & Enterprise)

Reliable, scalable SIP connectivity designed for performance.


Features:

  • Direct carrier interconnections: Interconnections with Tier-1 and Tier-2 carriers, ensuring better call quality.
  • Intelligent Least Cost Routing (LCR) routing: Dynamically select high-performing routes that balance quality and cost efficiency.
  • CLI support:  Compliant and transparent call delivery.
  • Failover redundancy: Built-in failover redundancy automatically reroutes traffic to prevent downtime.
  • Competitive termination rates: Secure and cost-effective for scaling voice operations. 

International Voice Termination

Features:

  • High ASR (Answer-Seizure Ratio)/ Strong ACD (Average Call Duration): By managing route quality and partnering with reliable carriers worldwide. 
  • Real-time route monitoring: Detect and eliminate underperforming routes to protect call stability and margins.
  • Stable CLI delivery: Ensures compliant and accurate caller identification.
  • PDD (Post-Dial Delay) optimization: Reduces post-dial delay for a better call experience.
  • Global coverage across 150+ countries: Dependable global connectivity tailored for wholesale and enterprise traffic.

DID Numbers

(Global Coverage)

DID service enables you to establish a local presence in markets worldwide without physical offices.

Features:

  • Instant DID provisioning: Allowing you to activate numbers quickly and scale operations without delays.
  • Local, international numbers &
toll-free options: Trusted numbers to increase higher inbound call volumes. 
  • Number portability support: Ensures you can transfer existing numbers seamlessly, avoiding service disruption and preserving brand continuity.

Why elfo?

10+ Years of Telecommunications Industry Experience 
Direct Carrier Relationships
Intelligent Routing Technology
24/7 NOC Support
Security and Fraud Protection

We understand routing, interconnections, and quality optimization at carrier level. 

We work directly with Tier-1 and Tier-2 carriers — minimizing intermediaries and maximizing quality.

Our dynamic routing engine continuously monitors:

  • ASR (Answer-Seizure Ratio): 40–65% (route dependent)
  • ACD (Average Call Duration): >2.5 mins
  • PDD (Post-Dial Delay): <5 sec
  • Route stability

Ensuring optimal call performance at all times.

Our dedicated support team is available around the clock to assist you via email ticketing. Whether you encounter an issue or need guidance, we’re here to ensure uninterrupted service at all times. 

Voice fraud can destroy margins overnight. We prevent it.

  • Real-time fraud detection
  • Traffic anomaly alerts
  • IP authentication
  • SIP over TLS
  • SRTP encryption
  • STIR/SHAKEN support
  • GDPR-compliant infrastructure

Your traffic stays secure. Your business stays protected.

Why elfo?

10+ Years of Telecommunications Industry Experience

We understand routing, interconnections, and quality optimization at carrier level.

Direct Carrier Relationships

We work directly with Tier-1 and Tier-2 carriers — minimizing intermediaries and maximizing quality.

Intelligent Routing Technology
  • ASR (Answer-Seizure Ratio): 40–65% (route dependent)
  • ACD (Average Call Duration): >2.5 mins
  • PDD (Post-Dial Delay): <5 sec
  • Route stability
24/7 NOC Support

Our dedicated support team is available around the clock to assist you via email ticketing. Whether you encounter an issue or need guidance, we’re here to ensure uninterrupted service at all times.

Security and Fraud Protection
  • Real-time fraud detection
  • Traffic anomaly alerts
  • IP authentication
  • SIP over TLS
  • SRTP encryption
  • STIR/SHAKEN support
  • GDPR-compliant infrastructure
Text Messaging

Talk To Us Today!

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Call your customers from anywhere around the world with elfo Voice Service!

Looking for a specific package?​

We provide custom package according to your needs.
Drop us your message and we will get back to you at the
soonest possible time.

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