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SMS node is used to send an SMS during a phone call. You can send to the caller’s number or a different number.
This node only works for phone number that has SMS enabled. This includes Retell Twilio numbers and custom telephony numbers that have passed A2P applications. Read more about enabling SMS.
The SMS will be sent when entering this node.
Agents can also receive SMS during an active call and understand the content, including text, images, audio, and video. This works out of the box for Retell Twilio numbers, and for custom telephony numbers that passed A2P applications. Read more at Receive SMS during call.

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Configure SMS content

You can write a prompt to let the agent infer the SMS content, or use static SMS content. Dynamic variable is supported for static SMS content.

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Configure SMS destination

By default, the SMS is sent to the caller’s number. You can also choose to send to a different number — either a static number or a dynamic variable (e.g. {{customer_phone}}).

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When Can Transition Happen

The node would transition to the next node once the SMS is successfully sent or failed to send. It should take less than 2 seconds to get that result. It will transition out of the node purely based on the SMS result.

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Node Settings

  • Global Node: read more at Global Node
  • LLM: choose a different model for this particular node. Will be used for function argument generation, and potentially speak during execution message generation.