Assertion: phone system's line | /r/HasProperty | needed to the 8 channel cards
Facets:
Source sentences:
text: In contrast to Nortel's DMS-100 which uses individual line cards with a codec, most lines are on two-stage analog space-division concentrators or Line Units, which connect as many as 512 lines, as needed, to the 8 Channel cards that each contain 8 codecs, and to high-level service circuits for ringing and testing.