Zycoo CooVox-U80 User Manual page 35

By default there are no existing dial rules configured in the IPPBX system. You need to click "New
DialRule" button to add a new dial rule.
Rule Name: A name for this dial rule.
PIN Set: A collection of PIN codes for granting outbound phone calls. See chapter 4.13.
Record in CDR: Record the PIN codes used for outbound phone calls along with the user
extension number and the dialed numbers in to the call logs.
Call Duration Limit: Specify the maximum call time using this dial rule.
Time Rule:Set a time condition when this dial rule can be used.
Available Trunks:All existing trunks in the IPPBX system.
Selected Trunks:Trunk/Trunks that can be used by this dial rule.
Custom Pattern:Dial patterns act like a filter for matching numbers dialed with trunks. The
various patterns you can enter are similar to Asterisk's definition of them:
X — Refers to any digit between 0 and 9
N — Refers to any digit between 2 and 9
Z — Any digit that is not zero. (E.g. 1 to 9)
. — Wildcard. Match any number of anything. Must match *something*.