!--a11y-->
NOSEND Scenarios (Mobile Client,
etc.) 
The NOSEND scenarios in particular have a requirement for a real asynchronous balanced mode. Units in outbound scenarios have as short a life span as possible; in NOSEND scenarios, however, a third entity decides when the units are processed. This can sometimes take weeks.
All new units are created by the new procedure, since the classic qRFC API is no longer supported. However, the new bgRFC API continues to process units from the classic procedure until they have all been completed.