Outbound Call Reliability and Toll-Free Campaign Filtering

Published: September 10, 2026

This week's update to the Syllable Agentic Platform fixes three ways an outbound call could go wrong: a call that sat silent until the one-hour session limit, a first utterance dropped on Spanish-language calls, and a dropped messaging connection that stalled the rest of a campaign batch. Campaign filters now cover every supported line type, including toll-free. Elsewhere, insight tool schemas are validated when they are saved rather than failing every run afterwards, a session handed off to a person now has separate tabs for the AI agent recording and the transfer recording, and the agent tester defaults to Responsive Dialogue with the dialpad tucked behind a keypad button.

Campaigns

• Fixed outbound calls that could sit open in silence until the one-hour session limit when the person who answered did not speak clearly, so that voicemail detection now completes and the agent starts the conversation.
• Added every supported line type, including toll-free, to outbound campaigns filters so that numbers can be included or excluded deliberately.
• Fixed the dropped first utterance on Spanish-language outbound calls so that the agent hears the caller without them having to repeat themselves.
• Fixed text message sending so that one failed message no longer delays the rest of a campaign's texts.

Sessions

• Added separate tabs for the AI agent recording and the transfer recording on sessions that were handed off to a person, so that it is clear which recording is playing, and made the audio player more compact.

Insights

• Added save-time validation of the property keys in insight tools so that a misconfigured schema is rejected with a clear error naming each offending key, instead of failing every workflow run afterwards.

Agents

• Defaulted the Console voice tester to Responsive Dialogue for agents that have a Responsive Dialogue target, so that a voice test uses the same path as production without being switched on each time.
• Collapsed the dialpad in the agent tester behind a keypad button so that the call transcript keeps the vertical space it previously lost.