Certain rules must be met when establishing a TTS connection:
The station user is allowed to transfer trunks (TTT attribute in COS) or it is an
attendant:
Both transferred trunks are trunks with no disconnect supervision:
Other AMOs which allow the transfer must be set
Features that may connect trunks and create TTS connection:
Transfer from
Consultation
Transfer from Conference
Transfer Before Answer
Transfer
from Join ( Attendant)
Single Step Transfer
ACD - Route Off Destination
If a supervised connection is created, then, when the trktotrk timer expires,
the ITR group set in VFGR ITDEST will intercept the recall
When the operator answers the recall, a conference between the trunks
and attendant is created. The operator may release this call pressing
the RELEASE key or may re-extend the trunks connection by pressing the
EXTEND key ( in this case creating a new supervised connection).