Instruction manual

Page 1292 of 3156 Direct Inward Dialing Recall Features on DTI2 for Italy
553-3001-306 Standard 10.00 January 2002
DID Offering
When a DID call placed on a DTI2 trunk terminates on a busy set, the system
replies by sending an End of Selection Busy (EOSB) signal on the calling
channel to inform the Public Exchange/Central Office that no further call
modification will be performed. Busy tone is returned while waiting for the
release signal from the Central Office (IDLE). The new DID Offering feature
enables the external Central Office operator to reroute the call to the attendant
by sending the Operator Recall Signal (OPRS) instead of the IDLE signal.
Upon receipt of the OPRS signal, the call is presented to the Attendant
Console on the Recall (RLL) Incoming Call Indicator (ICI) key.
DID Recall
When an established DID call placed on a DTI2 trunk is released by called
party (internal set), the Meridian 1 sends a Clear Backward (CLRB) signal on
the calling channel to inform the Central Office that the call has been
disconnected. Upon receipt of this signal, the Central Office should reply with
the IDLE signal to confirm the disconnection of the call. At this point, the
new DID recall feature allows the external Central Office operator to reroute
the call to the Attendant Console by sending the OPRS signal instead of
IDLE. The Meridian 1 will detect the OPRS as a valid signal and the call will
be presented to the Attendant Console on the RLL ICI key.
Operating parameters
Both DID Offering and DID Recall currently only support Type Approval in
Italy and are not commercially available.
The QPC536 Digital Trunk Interface and NTAK10 (XDTI) cards are
required.
This feature only works on DTI2 trunks.
Feature interactions
Basic Rate Interface (BRI) Special Call Forward Busy
This feature takes precedence over the DID offering; when the conditions for
the BRI Special Call Forward Busy are met, the call is diverted to the
Attendant Console without waiting for the OPRS signal. When the BRI
Special Call Forward Busy feature fails or is not enabled, busy tone is
returned to the Central Office and the DID offering can be activated.