Input: Voice node list (VNlist), time and threshold.
Output: A voice node list for processing call.
() Create new_VNlist
() For each node_voices on VNlist
()  If time_end(node_voice) <= time + threshold
()    Add node_voice to new_VNlist
() endfor
() return new_VNlist
Algorithm 2: Admissible VMs list (AVML).