Sites like Teletek Portal or Streamit host various IRIS-branded firmware, though they often cater to different hardware types like fire panels or audio players.
Right-click part01.rar and select "Extract Here." The software (like WinRAR or 7-Zip) will automatically pull data from the other parts, including part06, to create a single .bin or .pkg file. Download IRIS 55E6710 Firmware part06 rar
Official manufacturer links for this specific older model are often unavailable, so most users rely on technician forums and community archives: Sites like Teletek Portal or Streamit host various