Is 2124 not the Carlsberg strain, as per the Wyeast website?
Species: Saccharomyces pastorianus
Profile: This Carlsberg type yeast is the most widely used lager strain in the world. This strain produces a distinct malty profile with some ester character and a crisp finish. A versatile strain, that is great to use with lagers or Pilsners for fermentations in the 45-55°F (8-12°C) range. It may also be used for Common beer production with fermentations at 65-68 °F (18-20 °C). A thorough diacetyl rest is recommended after fermentation is complete.