Which of the following correctly describes the T$1$ carrier system? $($Select two.$)$

answer

T$1$ lines use four pairs of copper wire.

T$1$ lines have a maximum data rate of $2\mathrm{.}4$ Gbps$.$

T$1$ lines use two pairs of copper wire.

A single T$1$ channel can transfer data at $64$ Kbps$.$

T$1$ lines use $48$ separate channels.

T$1$ lines use analog signaling between the customer premise unit and the ISP.