Enables the acceptance of loopback commands issued
from a remote router. The no version restores the default value, which is to
reject loopback commands issued from a remote router.
Options
channel—One or more individual
T1 channels, ranges of T1 channels, or combination of individual channels
and ranges, in the range 1–28 (no spaces); for example, 3,7-15,19-13,27
