BL could use these commands...
ch cov r
ch cov p 87 (87 is an example, use an open coverage path)
add hunt next
add the external telephone number using ch cov r.
add the remote coverage path as the first coverage point in the coverage path(for example if you used the first entry in ch cov r, then you would use r1 as the first cov point.)
create a hunt group and give it a name and an internal extension number you want to call, then assign it with the coverage path you just changed. Make sure the COS can remotely CFWD and the COR can call the external number.