Bland - Call Number - Respell

The Bland Call Number step lets you call any phone number with an AI agent that sounds like a human. You can configure your phone agent with different base models, voice models, and behavior. Bland Call Number Documentation

Bland Call Number step

Options

Name	Type	Description
Phone Number	Phone Number	The phone number to call. Country code defaults to +1 (US) if not specified. Formatting is flexible, however for the most predictable results use the E.164 format.
Task	Plain Text	Provide instructions, relevant information, and examples of the ideal conversation flow.
First Sentence	Plain Text	A phrase that your call will start with instead of a generating one on the fly. This works both with and without wait_for_greeting. Can be more than one sentence, but must be less than 200 characters.
Wait For Greeting	Boolean	Should the AI speak first or wait for someone else to talk?
Request Data	Object	A JSON object that will be sent to bland when the call is answered.
Interruption Threshold	Integer	When you increase the interruption latency, you force the AI phone agent to listen longer before responding. In practice, increasing the threshold results in less interruptions and more latency.
Pathway ID	Plain Text	This is the pathway ID for the pathway you have created on our dev portal. You can access the ID of your pathways by clicking the ‘Copy ID’ button of your pathway.
Model	Dropdown	Select a model to use for your call. Options: gpt4, base, turbo and enhanced.
Record	Boolean	To record your phone call, set record to true. When your call completes, you can access through the recording_url field in the call details or your webhook.
Transfer Phone Number	Plain Text	A phone number that the agent can transfer to under specific conditions - such as being asked to speak to a human or supervisor.
Language	Dropdown	Select a supported language of your choice. Optimizes every part of our API for that language - transcription, speech, and other inner workings.
Max Duration	Integer	Set the longest you want the call to possibly go in minutes. After the max_duration minutes have passed, the call will automatically end.
Answered by Enabled	Boolean	Enables machine detection when the call starts to determine whether the call was answered by a person or a voicemail.
Temperature	Decimal	A value between 0 and 1 that controls the randomness of the LLM. 0 will cause more deterministic outputs while 1 will cause more random.
Start Time	Datetime	The time you want the call to start. If you don’t specify a time (or the time is in the past), the call will send immediately.
Voicemail Message	Plain Text	When the AI encounters a voicemail, it will leave this message after the beep and then immediately end the call.
Voicemail Action	Dropdown	This is processed separately from the AI’s decision making, and overrides it.
AMD	Boolean	AMD (Answering Machine Detection) mode helps your AI navigate phone trees and IVR systems. If you know your call will hit an automated system you should switch it on.

Outputs

Name	Type	Description
Transcript	Plain Text	The full transcript of the call. Use this for post-call automation or processing.
Answered By	Plain Text	Whether the call was picked up by a “human”, “voicemail”, or “unknown”.

Tips

Try different Model and Voice Model settings - these can make a big difference on the quality of the call.
For help in writing good Tasks, refer to Bland’s prompting guide.
You can view your call recordings in your Bland dashboard.
If you need complex dialog control, or the agent isn’t following the Task well, try using their Conversational Pathways. You can paste the ID into Respell once it’s set up.

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