First and Next Available Members
The first available member and the order of the next available members is determined by the hunt group's Hunt Type setting.

Additional Calls
Additional incoming calls are presented in parallel up to the number of available group members.

No Available Members
If the number of incoming calls exceeds the number of available members to which calls can be presented, the following actions are usable in order of precedence.

Queuing
If queuing has been enabled for the hunt, it is applied to the excess calls.

Voicemail
If voicemail has been enabled for the hunt group, excess calls are directed to voicemail.

Busy Tone
Busy tone is returned to the excess calls.

No Answer Time
This value is used to determine how long a call should ring at a hunt group member before being presented to the next available hunt group member. The System | Telephony | No Answer Time setting is used unless a specific Hunt | Hunt Group | No Answer Time is set.

Calls Not Being Answered Quick Enough - Overflow
In addition to ringing at each available member for the No Answer Time, a separate Overflow Time can be set. When a calls total ring time against the group exceeds this, the call can be redirected to an overflow group or groups.  

No Available Member Answers
If a call has been presented unanswered to all the available members, either of two actions can be applied. If voicemail is available, the call is redirected to voicemail. If otherwise, the call will continue being presented to hunt group members until answered or, if set, overflow is used.

Call Waiting
For hunt groups using the Group hunt type, call waiting can be used. This requires the group members to have their own Call Waiting setting enabled or to have available call appearance buttons.