What is the correct method of calling people to the solar eclipse prayer in the absence of the Adhan?

The Eclipse Prayers (صلاة الكسوف والخسوف)

• Saying "Hayya 'ala al-Salah" three times.
• Calling out: "Al-Salatu Jami'ah".
• Blowing a horn or ringing a bell.
• No call is permitted; people must guess the time.