In the line group, you can use the RNA Reversion Timeout value:

Enter a time, in seconds, after which Cisco Unified Communications  Manager will distribute a call to the next available or idle member of  this line group or to the next line group if the call is not answered  and if the first hunt option, Try next member; then, try next group in Hunt List, is chosen. The RNA Reversion Timeout applies at the line-group level to all members.

Generally speaking 4-5 seconds = 1 ring cycle but you will have to play with the numbers to get them to where you'd like them to be.

Hailey

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