as pipeline elements and the pipeline is configured with a configuration string
via a new PH_CONTROL parameter: PIPELINE_CFG.
The config-string is as follows: mec2(training=1)|kb1ec
With this example, the audio data would flow through mec2 (instantiated with the
parameter-string "training=1") and then through kb1ec (instantiated without
parameters).
The three echo cancellers are now build as separate modules, named mISDN_dsp_*.