AudioCodes Mediant 2000 User Manual

Version 6.6 647 Mediant 2000
User's Manual 45. Configuration Parameters Reference
Parameter Description

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.
 [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.
 [4] = Supports QSIG Single Step transfer:
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.
 [5] = IP-to-Tel Blind Transfer mode supported for ISDN protocols
and implemented according to AT&T Toll Free Transfer Connect
Service (TR 50075) “Courtesy Transfer-Human-No Data”. When the
device receives a SIP REFER message, it performs a blind transfer
by first dialing the DTMF digits (transfer prefix) defined by the
parameter XferPrefixIP2Tel (configured to "*8" for AT&T service),
and then (after 500 msec) the device dials the DTMF of the number
(referred) from the Refer-To header sip:URI userpart.
If the hostpart of the Refer-To sip:URI contains the device's IP
address, and if the Trunk Group selected according to the IP to Tel
Routing table is the same Trunk Group as the original call, then the
device performs the in-band DTMF transfer; otherwise, the device
sends the INVITE according to regular transfer rules.
After completing the in-band transfer, the device waits for the ISDN
Disconnect message. If the Disconnect message is received during
the first 5 seconds, the device sends a SIP NOTIFY with 200 OK
message; otherwise, the device sends a NOTIFY with 4xx message.
 [6] = Supports AT&T toll free out-of-band blind transfer for trunks
configured with the 4ESS ISDN protocol. AT&T courtesy transfer is a
supplementary service which enables a user (e.g., user "A") to
transform an established call between it and user "B" into a new call
between users "B" and "C", whereby user "A" does not have a call
established with user "C" prior to call transfer. The device handles
this feature as follows:

IP-to-Tel (user side): When a SIP REFER message is received,
the device initiates a transfer by sending a Facility message to
the PBX.

Tel-to-IP (network side): When a Facility message initiating an
out-of-band blind transfer is received from the PBX, the device
sends a SIP REFER message to the IP side (if the
EnableNetworkISDNTransfer parameter is set to 1).
Note: For configuring trunk transfer mode per trunk, use the parameter
TrunkTransferMode_X.
[TrunkTransferMode_X
]
Determines the trunk transfer mode per trunk (where x is the Trunk ID).
For configuring trunk transfer mode for all trunks and for a description of
the parameter options, refer to the parameter TrunkTransferMode.

AudioCodes Mediant 2000 Specifications

General

Brand	AudioCodes
Model	Mediant 2000
Category	Gateway
Language	English