Parameter: MLPP: Default look ahead for busy when unspecified
From TBwiki
Default look ahead for busy value. This value is used if the information is not present in the signaling.
- LFB allowed: Indicates that the LFB option is allowed.
- LFB path reserved: Indicates that the path for the call is reserved (national use).
- LFB not allowed: Indicates that the LFB option is not allowed.