There is no Australian Embassy in Ulaanbaatar yet. We only have Australian Consulate-General (ACG) under the roof of Australian Trade Commission (Austrade) Ulaanbaatar.
2. AVAC center operates under the Department of Immigration and Citizenship (DIAC) of Australia, therefore ACG is a separate organisation and do not deal with visa.
3. AVAC center is located at the DHL building next to the 1st maternity hospital and their phone number is 7711-4474 with working hours from 8am to 3pm.
(Enkhmaa tomorbaatar (05 Dec 14:13): iishee utasdaj asuuhaar medeelel uguhgui dan material l huleen avch bgan bnlee)
Thank you for attention and warm regards,
Austrade and ACG, Ulaanbaatar