Assertion: whistle's tone | /r/HasProperty | sent by local user
Facets:
value: into the phone line
type: TRANSITIVE-OBJECT
value: manually
type: MANNER
Source sentences:
text: If the tone was sent manually by the local user into the phone line, it would trigger the remote switch to go on-hook, but critically, the local switch knew he was still off-hook because that was signaled electrically, not by the tone (which their local switch ignored).