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Telnyx VoIP Overview

Telnyx VoIP Overview

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Joshua Lim
Β· 20 Jun 2025
less than a minute read

Telnyx VoIP is a cloud-based voice solution that enables businesses to make and receive traditional phone calls directly on respond.io. This integration allows teams to manage voice conversations alongside messaging channels in one unified workspace.

Learn how to create and connect your Telnyx VoIP account to respond.io here. Once connected, your team can handle inbound and outbound calls, access call logs, and manage phone numbers directly through the Telnyx portal.

Pricing

Telnyx VoIP operates on a pay-as-you-go model. Users are billed directly by Telnyx, with no additional charges from respond.io.

  • Outbound calls: From $0.007/min (depending on destination)

  • Inbound calls: From $0.0055/min

For accurate and up-to-date pricing, visit the Telnyx pricing page.

Capturing Calls

Telnyx VoIP enables traditional phone communication with your customers. Here’s how your team can get started:

  • Phone number purchase: After connecting a Telnyx sub-account, purchase local or international phone numbers in the Telnyx portal. International numbers may require submission of additional documents β€” see Telnyx documentation for details.

  • Voice interactions: Use the respond.io Inbox to make and receive calls using your Telnyx number.

  • Call logs: All call activity is automatically logged in respond.io for reference and reporting.

Channel Capabilities

Once your Telnyx VoIP channel is connected, your workspace will support the following features:

Capability

Availability

Outbound calling

βœ…

Inbound calling

βœ…

Call routing

βœ…

Caller ID (if supported)

βœ…

Call logging

βœ…

Call masking

βœ… (if supported by Telnyx)

Call status tracking

βœ… (e.g. missed, answered)

Call control (mute, hold, end)

βœ…

Telnyx VoIP Channels do not support messaging. The Channel is exclusively for calls.

Call Behavior & Coverage

  • Caller ID Masking: Available if your number is verified in Telnyx. You may need to request Level 2 verification to enable international outbound calls.

  • Voice Coverage: Global inbound calling is supported. Outbound calls to countries outside the US require additional verification. Note: International outbound calling requires Level 2 Verification.

Calls cannot be made if the Telnyx number status is not active. You’ll see an error in respond.io if the number is inactive.

Limitations

Due to the nature of Telnyx and respond.io’s integration model, the following limitations apply:

  • Sub-Account Limits: A maximum of 3 Telnyx sub-accounts can be created per respond.io workspace.

  • Trial Users: VoIP Channels are disabled for trial users.

  • Manual Number Purchase: Phone numbers must be purchased and managed within the Telnyx portal.

  • White-Labeling: Telnyx is not white-labeled. Users will interact directly with the Telnyx dashboard for account setup, verification, payments, and number management.

  • Automation & Workflows: Automation based on VoIP call events (e.g. missed calls) is currently out of scope.

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