Cisco TelePresence Administrator's Manual page 468

Reference material
Command reference — xConfiguration
Zones Zone [1..1000] TraversalServer UDPProbe KeepAliveInterval: <1..65534>
Sets the interval (in seconds) with which the traversal client will send a UDP probe to the VCS once a call is established, in order to
keep the firewall's NAT bindings open. Default: 20.
Example: xConfiguration Zones Zone 5 TraversalServer UDPProbe KeepAliveInterval: 20
Zones Zone [1..1000] TraversalServer UDPProbe RetryCount: <1..65534>
Sets the number of times the traversal client will attempt to send a UDP probe to the VCS. Default: 5.
Example: xConfiguration Zones Zone 5 TraversalServer UDPProbe RetryCount: 5
Zones Zone [1..1000] TraversalServer UDPProbe RetryInterval: <1..65534>
Sets the frequency (in seconds) with which the traversal client will send a UDP probe to the VCS. Default: 2.
Example: xConfiguration Zones Zone 5 TraversalServer UDPProbe RetryInterval: 2
Zones Zone [1..1000] Type: <Neighbor/TraversalClient/TraversalServer/ENUM/DNS>
Determines the nature of the specified zone, in relation to the local VCS.
Neighbor: the new zone will be a neighbor of the local VCS.
TraversalClient: there is a firewall between the zones, and the local VCS is a traversal client of the new zone.
TraversalServer: there is a firewall between the zones and the local VCS is a traversal server for the new zone.
ENUM: the new zone contains endpoints discoverable by ENUM lookup.
DNS: the new zone contains endpoints discoverable by DNS lookup.
Example: xConfiguration Zones Zone 3 Type: Neighbor
Cisco VCS Administrator Guide (X8.1.1) Page 468 of 507