Table schema:
CREATE TABLE table_name_49 (standard_name VARCHAR, version VARCHAR, downstream_rate VARCHAR)

Question: What's the standard name with an ADSL2 version and a 01.5 1.5 mbit/s downstream rate?
SQL: SELECT standard_name FROM table_name_49 WHERE version = "adsl2" AND downstream_rate = "01.5 1.5 mbit/s"