HST with ASL
USRobotics Voice Data External Modem. Courier HST with ASL. 1992 US Robotics Model 1.014.425 Rev. A Label on bottom does refer to V.32, so there may have been a front label change with the same revision number because some that I've seen have the same model number, but say Courier V.32 bis Fax w/ASL on the front.
There is a brochure/article from USRobitics about the Courier modems here.
Included is a modem serial cable 9 pin female to 25 pin male. I do not have a power supply/adapter for this modem, so am unable to power on.