Learn about SIP trunking and how it enhances your communication capabilities. This guide provides an overview of SIP features and benefits.

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What is SIP trunking?

Session Initiation Protocol (SIP) trunking lets you make and receive phone calls and other digital communications over the internet. A trunk is a virtual phone line that allows calls over the internet to anyone with a phone number. SIP trunks support voice, video, and messaging, replacing analog and ISDN phone lines. Many countries are phasing out ISDN, making SIP trunking the future of business telephony.

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Benefits of SIP trunking

SIP trunking is ideal for businesses of all sizes. If you expect increased call volumes, SIP trunking offers:

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1. Cost savings

  • Pay per channel for the number of concurrent calls you need
  • Lower setup and call charges, especially for international calls
  • Choose between metered and unmetered plans

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2. Scalability

  • Add or remove channels as your business grows
  • Free calls between locations using the same carrier
  • Adjust bandwidth for more concurrent calls
  • Use dedicated data circuits for guaranteed quality

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3. Reliability

  • Automatic number failover and diverse call routing
  • Backup internet connections for resilience

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4. Real-time analytics & insights

  • Instant call logs and AI-driven insights
  • Detailed user breakdowns for performance tracking

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5. Centralized communication

  • Unify voice, video, and messaging on one platform

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6. Call quality

  • High-quality digital calls with minimal dropouts
  • Automatic error correction for clear audio

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7. Security

  • Dedicated, monitored connections with alerts for unusual activity

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8. Flexibility

  • Use local numbers in multiple regions
  • Retain phone numbers when relocating

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How SIP trunking works

SIP trunking replaces ISDN and copper lines by sending digital call packets over data networks.

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SIP channels

  • Each channel is like a digital phone line, allowing one inbound and one outbound call at a time
  • Add new channels without extra hardware

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SIP trunks

  • Group multiple channels (usually 20+)
  • Bridge your phone system and your Internet Telephony Service Provider (ITSP)
  • Connect PBX systems to the Public Switched Telephone Network (PSTN)

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SIP protocol

  • Defines how to start and end internet-based communication
  • Supports voice, video, and messaging

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SIP provider

  • Offers SIP trunking services and integrates with your PBX or IP PBX
SIP trunking is a future-proof solution for cost-efficient, scalable, and feature-rich digital telephony. 💡