The settlement Okhum  is located in Bayzak district, 300 m to the West from highway Sambek-Bostandyk. The settlement was first surveyed in 1894 by V. V. Barthold, in 1936-38 it was surveyed by the Semirechensk archaeological expedition under the leadership of A. N. Bernshtam. In 1983 it was surveyed by the archaeological detachment of KazGU under the leadership of M. E. Eleuov, a schematic plan was removed, sections of shafts were made, lifting ceramic material was collected.  In 1986 and 2000, a detachment of the archaeological expedition of K. M. Baypakov worked at the settlement.

Visual examination with the study of aerial photographs revealed the following characteristics of the monument. Complex topographically structure, surrounded by two rows of walls. The fortification has the form of a quadrangular platform oriented to the cardinal points, surrounded by a swollen shaft. The towers are located at the corners and along the perimeter of the walls, 18 swollen mounds have been preserved. The gates were located in the middle of the Western and Eastern walls. They have a complex system of additional fortifications. The surface inside the settlement is characterized by the presence of hills, which give an idea of the dense building, divided by the main street connecting the Eastern and Western gates and the streets departing from it.

As shown by the study of aerial photographs of the settlement to the shaft, adjacent areas of the walled agricultural district. These are different-sized rectangular plots, divided from the inside into smaller ones, each of which, together with a residential building on it, represented, apparently, an individual land ownership.

Traced the remains of an ancient irrigation near Ahjumma using water from the river Karabakh – the left tributary of the Talas river. From it the main channels up to 2,5 – 6 km long are carried out. The sources of one of the channels were protected by the castle. Now it is a hillock with a diameter of 20 m and a height of 6 m. Ceramics collected on the surface of the settlement, taluses of the walls, in the edges of the channels, dates back to the VI-XII centuries.