When was the Iliad transcribed?

After the Trojan War (generally accepted around 1200 BC), there was a long calm period which broke after 400 years in 800 BC with important events. The most important among them was writing. Greek merchants observed the writing techniques of Phoenicians (were living in East Mediterranean) and after a while they copied it. They took the Phoenician alphabet with the exact order, alep, bet, gimel, dalet..., and transformed it to Greek alphabet as alpha, beta, gamma, delta etc... Phoenicians were using only the consonants, Greeks added five them new vowels. Then they had an alphabet with 26 letters with which every word can be transcribed understandably. With this process, the vowels are invented and in Europe a Latin version is still used.

After the Mycenaean palaces are destructed around 1200 BC, the Greeks were without any alphabet for around 400 years, but now they regained it. At that period, i.e. around 730 BC, the Iliad, and after a short while the Odyssey are transcribed. Although we don't have any manuscript from 8th century BC, the experts are almost sure that around 7 BC, there were copies of theses epics.