RNA Reversion telecom.

[crystal]

Пожалуйста, помогите перевести.
RNAR (Ring No Answer Reversion)
Выражение встречается в следующем контексте:
Enter a time, in seconds, after which Cisco CallManager 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.

Заранее спасибо