This read-create Integer32, in seconds from 0 to 3600, specifies how long the local ring back tone (played toward the TDM side) is generated unless interrupted by an answer or a delete-connection command from the call agent, with 0 meaning indefinite generation. Admins care because callers hearing ring back longer than expected, or having it cut off too soon, both indicate a misconfigured value. For example, an admin noticing local ring back tone stopping abruptly on long-ringing calls would raise this timeout value.