The COMSPHEREModel 3920Plus modems are full-feature, high-speed leased modems, providing reliable asynchronous and synchronous operation over leased or dial-line networks with data rates as high as 33,600 bps.
The COMSPHERE 3920Plus modem is available in several models. This document refers to model numbers in the 3920-A2 series, which are singleport modems with single-rate power supplies. Modems in the 3920-A1 series have universal power supplies and are described in the COMSPHERE 3900 Series Modems, Models 3920Plus and 3921Plus, Installation Instructions, Document No. 3920-A2-GK41.