CHAPTER68 Configuration Parameters Reference
Mediant 1000 Gateway & E-SBC | User's Manual
Parameter Description
â– [2] = Supports ISDN PRI and BRI transfer - Release Link
Trunk (RLT) (DMS-100), Two B Channel Transfer (TBCT)
(NI2), Explicit Call Transfer (ECT) (EURO ISDN), and Path
Replacement (QSIG). When a SIP REFER message is
received, the device performs a transfer by sending Facility
messages to the PBX with the necessary information on the
call's legs to be connected. The different ISDN variants use
slightly different methods (using Facility messages) to
perform the transfer.
Note:
✔ For RLT ISDN transfer, the parameter
SendISDNTransferOnConnect must be set to 1.
✔ The parameter SendISDNTransferOnConnect can be
used to define if the TBCT/ECT transfer is performed
after receipt of Alerting or Connect messages. For RLT,
the transfer is always done after receipt of Connect
(SendISDNTransferOnConnect is set to 1).
✔ This transfer can be performed between B-channels
from different trunks or Trunk Groups, by using the
parameter EnableTransferAcrossTrunkGroups.
✔ The device initiates the ECT process after receiving a
SIP REFER message only for trunks that are
configured to User side.
â– [3] = Supports CAS Normal transfer. When a SIP REFER
message is received, the device performs a Blind Transfer
by executing a CAS Wink, dialing the Refer-to number to the
switch, and then releasing the call.
â– [4] = Supports QSIG Single Step transfer PRI and BRI:
✔ IP-to-Tel: When a SIP REFER message is received,
the device performs a transfer by sending a Facility
message to the PBX, initiating Single Step transfer.
Once a success return result is received, the transfer is
completed.
✔ Tel-to-IP: When a Facility message initiating Single
Step transfer is received from the PBX, a SIP REFER
message is sent to the IP side.
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