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J17, J18: They are used to connect to other cards, when you have several cards in your server.
Using clock line to connect each other, all of the cards work in one server can synchronize
accurately. If customer have PRI card and analog card in one server, the analog card can
synchronize accurately with telecom in this way, and it is useful for fax.
J18 and J17
JP5: It is used for selecting the PCI power feeding for the card, by default we choose the 3.3v for
the card, customer do not need to reset the jumper; the card can also choose 5.0v for power feedin
g in the case that the 3.3v in the motherboard of PC is not enough for the card, but this
phenomenon happens rarely.
For Choosing 3.3v Power For Choosing 5.0v Power
