this is from srnd :Cisco recommends that you do not deploy shared lines across branches, such that the devices sharing the line are in different branches.
but in clustering over wan, it says one of the cons is it supports shared line.
The key advantages of clustering over the WAN are:
?Single point of administration for users for all sites within the cluster
?Shared line appearances
Why clustering over wan is ok to support shared line and centralied not recommended?