Maqam Ajam starts with a Ajam
trichord on the first note, and another Ajam
trichord on the 5th note (the dominant). The secondary
jins is the Kurd
tetrachord on the 3rd note, often used in modulation.
When maqam Ajam starts on B,
it is called Ajam 'Ushayran.
Hear this Maqam: