Sip Refer Transmission (& Isdn Explicit Call Transfer Support) - Patton electronics SmartWare R.3.20 Software Configuration Manual

SmartWare Software Configuration Guide
The type of header sent depends on the screening-indicator property of the call-control. When receiving one of
these privacy headers the screening-indicator is also set depending on the received header type.
Mode: Context CS
Step
1
node (ctx-ip)[ctx- name ]# interface sip
<if-name>
2
node (if-sip)[if- name ]# privacy
SIP REFER Transmission (& ISDN Explicit Call Transfer support)
Additional call transfer support, a push-back mechanism, is enabled by default for SIP interfaces by sending
REFER messages.
SmartWare detects calls that are looped internally, i.e. calls that leave the device over the same SIP interface
over which they enter the device. If an internal loop is detected for a SIP interface, SmartWare sends a REFER
message to push back the call to the connected network as soon as the call is connected.
ISDN interfaces react similarly to internally looped calls. The push-back mechanism is enabled by default for
ISDN interfaces (BRI ports) by accepting or rejecting explicit call-transfer (ECT) invocations. An ISDN
phone that is connected to a BRI port and that has two active calls can send an ECT invocation to connect the
two calls inside the device. An ISDN interface can be configured to accept or reject ECT invocations.
SmartWare detects calls that are looped internally, i.e. calls that leave the device over the same ISDN interface
over which they enter the device. If an internal loop is detected for an ISDN interface bound by an ISDN user
port, SmartWare sends an explicit call-transfer (ECT) to push back the call to the connected network as soon
as the call is connected. An ISDN interface can be configured to emit ECT invocations
SIP interface configuration task list
Command
32 • SIP interface configuration
Purpose
Go to the SIP interface, for which you want
to enable privacy.
Enable privacy
378