AudioCodes Mediant 600 User Manual page 379

SIP User's Manual
Parameter
[EnableTransferAcrossTrunkGrou
ps]
CAS Parameters
Note: For configuring the 'CAS State Machine' table using the Web interface, refer to ''Configuring the
CAS State Machines'' on page 83.
Web: CAS Transport Type
EMS: CAS Relay Transport Mode
[CASTransportType]
Version 5.8
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 REFER message is
sent to the IP side.
[5] = IP-to-Tel Blind Transfer mode supported for ISDN
PRI/BRI 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.
Determines whether the device allows ISDN ECT, RLT or
TBCT IP-to-Tel call transfers between B-channels from
different trunks or Trunk Groups.
[0] = Disable - ISDN call transfer is only between B-
channels of the same trunk or Trunk Group (default).
[1] = Enable - the device performs ISDN transfer between
any two PSTN calls (between any trunk or Trunk Group)
handled by the device.
Note: The ISDN transfer also requires that you configure the
parameter TrunkTransferMode_x to 2.
Controls the ABCD signaling transport type over IP.
[0] CAS Events Only = Disable CAS relay (default).
[1] CAS RFC2833 Relay = Enable CAS relay mode using
RFC 2833.
The CAS relay mode can be used with the TDM tunneling
feature to enable tunneling over IP for both voice and CAS
signaling bearers.
379
6. Configuration Parameters Reference
Description
September 2009