Yes. The 660 T pack can test T1 and DDS (56K) lines. The T pack has a T1, Serial, and DDS noses. The DDS nose is used for the 56k line testing.
Yes. The 660 T pack can test T1 and DDS (56K) lines. The T pack has a T1, Serial, and DDS noses. The DDS nose is used for the 56k line testing.