It alowes you to do conferencing on your telephones if anyones press conf on there phone it uses that card and it also alowes you to have flexible tones LD 56. hope that helps.
TDS/Conf is a dual purpose card:
TDS: Tone and Digit Switch. It's in charge of sending different kind of tones (dial tone, busy tone, ring back tone, etc)
Conf: Conference, you use it every time you make a conference (3-way or 6-way). It can also broadcast music and provide several features.
Every service loop can be used for 30 parties
You should have at least 1 TDS/conf in every NET shelf.
You can check in LD 2 -INVS 2: if you have FTMs you may need TDS/conf cards.
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