Ujjain standard symbol (which consists of four dotted circles)  which appears on thousands of ancient coins from Ujjain and Eran mints of Ancient India. The same dotted circle occurs on the pot of a Bronze Age site in Turkey, Alishar Hyyuk, close to Cadir Hoyuk. I suggest that the dotted circle is read in Meluhha (mleccha) rebus in the sites of Turkey and India.

There are two hieroglyphs in the dotted circle: 1. Dot; 2. Circle. The dot is an orthographic style to signify a strand (like a strand of thread inserted through a perforated bead). The circle hieroglyph also a livelihood activity, duty, office; the word is vatta ‘circle’ rebus:-ʻduty, office’ (Pali).

Thus, together, the hypertext of dotted ciecle signifies:  dhã̄i 'strand' rebus: dhāū, dhāv m.f. ʻ a partic. soft red stoneʼ dhatu 'mineral ore' PLUS vaṭa'string' vaṭṭa 'circle' together rebus expression: dhāvaḍ 'smelter'. Thus, the Ujjaini symbol used as an Indus Script hypertext on Rojdi potsherd reads: dhāvaḍ kaṇḍa 'smelter implements'. cf. dāya'roll of one in dice game' தாயம் tāyam, n. < dāya. 1. Patrimony, inheritance, wealth of an ancestor capable of inheritance and partition (R. F.); பாகத்திற்குரிய பிதிரார்ச்சிதப்பொருள். 2. Share; பங்கு. (யாழ். அக.) 3. Paternal relationship; தந்தைவழிச் சுற்றம். (யாழ். அக.) 4. A fall of the dice; கவறுருட்ட விழும் விருத்தம். முற்பட இடுகின்ற தாயம் (கலித். 136, உரை). 5. Cubical pieces in dice-play; கவறு. (யாழ். அக.) 6. Number one in the game of dice; கவறுருட்ட விழும் ஒன்று என்னும் எண். Colloq. 

Hieroglyph, circle is: vr̥ttá ʻ turned ʼ RV., ʻ rounded ʼ ŚBr. 2. ʻ completed ʼ MaitrUp., ʻ passed, elapsed (of time) ʼ KauṣUp. 3. n. ʻ conduct, matter ʼ ŚBr., ʻ livelihood ʼ Hariv. [√vr̥t1]1. Pa. vaṭṭa -- ʻ round ʼ, n. ʻ circle ʼ; Pk. vaṭṭa -- , vatta -- , vitta -- , vutta -- ʻ round ʼ; L. (Ju.) vaṭ m. ʻ anything twisted ʼ; Si. vaṭa ʻ round ʼ, vaṭa -- ya ʻ circle, girth (esp. of trees) ʼ; Md. va'ʻ round ʼ GS 58; -- Paš.ar. waṭṭəwīˊk, waḍḍawik ʻ kidney ʼ ( -- wĭ̄k vr̥kká -- ) IIFL iii 3, 192? 2. Pk. vaṭṭa -- , vatta -- , vitta -- , vutta -- ʻ passed, gone away, completed, dead ʼ; Ash. weṭ -- intr. ʻ to pass (of time), pass, fall (of an avalanche) ʼ, weṭā -- tr. ʻ to pass (time) ʼ; Paš. wiṭīk ʻ passed ʼ; K.ḍoḍ. buto ʻ he was ʼ; P. batāuṇā ʻ to pass (time) ʼ; Ku. bītṇo ʻ to be spent, die ʼ, bitauṇo ʻ to pass, spend ʼ; N. bitāunu ʻ to pass (time), kill ʼ, butāunu ʻ to extinguish ʼ; Or. bitibā intr. ʻ to pass (of time), bitāibā tr.; Mth. butāb ʻ to extinguish ʼ; OAw. pret. bītā ʻ passed (of time) ʼ; H. bītnā intr. ʻ to pass (of time) ʼ, butnā ʻ to be extinguished ʼ, butānā ʻ to extinguish ʼ; G. vĭ̄tvũ intr. ʻ to pass (of time) ʼ, vatāvvũ tr. ʻ to stop ʼ(CDIAL 12069)

Rebus: Pa. vatta -- n. ʻ duty, office ʼ; Pk. vaṭṭa -- , vatta -- , vitta -- , vutta -- n. ʻ livelihood ʼ; P. buttā m. ʻ means ʼ; Ku. buto ʻ daily labour, wages ʼ; N. butā ʻ means, ability ʼ; H. oūtā m. ʻ power ʼ; Si. vaṭa ʻ subsistence, wages ʼ.
vārttā -- ; *ardhavr̥tta -- , *kaṇavr̥tta -- , *dyūtavr̥tta -- ,  (CDIAL 12069)

Hieroglyph: dhāˊtu n. ʻ substance ʼ RV., m. ʻ element ʼ MBh., ʻ metal, mineral, ore (esp. of a red colour) ʼ Mn., ʻ ashes of the dead ʼ lex., (CDIAL 6773)

Vessel with a quatrefoil mouth, Alishar, Middle Bronze Age III, 1750-1650 BC, ceramic - Oriental Institute Museum, University of Chicago