Editing Telegraph key (section)

==== Mode {{sc|B}} ====
Mode&nbsp;{{sc|B}} is the second mode, which devolved from a logic error in an early iambic keyer.{{citation needed|date=March 2018}} Over the years iambic mode&nbsp;{{sc|B}} has become something of a standard and is the default setting in most keyers.

In mode&nbsp;{{sc|B}}, dots and dashes are produced as long as both paddles are depressed. When the paddles are released, the keying continues by sending ''one more element'' than has already been heard. I.e., if the paddles were released during a ''dah'' then the last element sent will be a following ''dit''; if the paddles were released during a ''dit'' then the sequence will end with the following ''dah''.

Users accustomed to one mode may find it difficult to adapt to the other, so most modern keyers allow selection of the desired mode.