5.37.2.8. LCR Configuration 
All VC trunks to a specific route are combined in one trunk group. This
VC trunk group will be used in a new route element which has been added
to the route.
In the following example all relevant parameters are marked bold:
ADD-LDAT:LROUTE=<?>,LSVC=VCE,LVAL=1,TGRP=<?>, ODR=<?>,LAUTH=64,CARRIER=<?>,ZONE=<?>, LATTR=VOICO,MSO=<?>,VCCYC=6;
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A compressed route element has to be created with the LCR service voice.
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With a particular LCR authorization it's possible to exclude some subscribers from
VC.
(i.e. necessary in case of analog fax devices)
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The LCR route element should be marked by the LCR attribute VOICO to have the
option for a selected query.
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The value of this parameter limits the number of compression/decompression cycles,
because too much compression/decompression cycles decrease the quality of speech.
The deterioration of voice quality is marginal with up to 8 cycles of
compression/decompression.
Multiple compression/decompression cycles are the result of not available VOICO
routes in a network during the connection setup.
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