A bonded
T1 (also called DS1) is two or more T1s
that have been joined (bonded) together to increase
bandwidth. A full T1 provides approximately
1.5Mbps
or 24 individual channels each of which supports 64Kbit per second, where two
bonded T1s provide 3Mbps or 46 channels. Two bonded T1s allow you to use
the full bandwidth of 3Mbps where two individual T1s can still only use a
maximum of
1.5Mbps at one time. To be bonded the
T1 must run into the same
router at the end, meaning they must run to the same
ISP. Bonded T1s can use
MPPP.