Paradyne 2001 User Manual page 53

Table 5-2. Data-Only Mode (2 of 2)
Originating End Answering End
The application completes the
send, and the remote user
acknowledges receipt. The
user returns to VoiceSpan
mode by tapping the telephone
hookswitch. Simultaneous
audio and data mode is
restored.
The VoiceSpan session proceeds.