Call Features
151
Parameter
features.dnd.feature_key_sync.enable
<y0000000000xx>.cfg
Description
It enables or disables the DND feature synchronization.
Note
: It works only if “features.feature_key_sync.enable” is set to 1 (Enabled).
Permitted Values
0
-Disabled
1
-Enabled, server-based DND is enabled. Server and local phone DND are synchronized.
Default
1
Call Hold
Call hold provides a service of placing an active call on hold. It enables you to pause activity on an active call so that
you can use the phone for another task, for example, to place or receive another call.
When a call is placed on hold, the IP phones send an INVITE request with HOLD SDP to request remote parties to stop
sending media and to inform them that they are being held. IP phones support two call hold methods, one is
,
which sets the “a” (media attribute) in the SDP to sendonly, recvonly or inactive (for example, a=sendonly). The other is
, which sets the “c” (connection addresses for the media streams) in the SDP to zero (for example, c=0.0.0.0).
Topic
Call Hold Configuration
The following table lists the parameters you can use to configure call hold.
Parameter
sip.rfc2543_hold
<y0000000000xx>.cfg
Description
It enables or disables the IP phone to use RFC 2543 (c=0.0.0.0) outgoing hold signaling.
Permitted
Values
0
-Disabled, SDP media direction attributes (such as a=sendonly) per RFC 3264 is used when placing a
call on hold.
1
-Enabled, SDP media connection address c=0.0.0.0 per RFC 2543 is used when placing a call on hold.
Default
0
Web UI
Features->General Information->RFC 2543 Hold
Parameter
account.X.hold_use_inactive
[1]
<MAC>.cfg
Description
It enables or disables the IP phone to use inactive outgoing hold signaling.
Note
: It works only if “sip.rfc2543_hold" is set to 0 (Disabled).
Permitted
Values
0
-Disabled, SDP media direction attribute “a=sendonly” is used when placing a call on hold.
1
-Enabled, SDP media direction attribute “a=inactive” is used when placing a call on hold. RTP packets
will not be sent or received.
Default
0
[1]
X is the account ID. X=1-8.
Call Forward
You can forward calls from any line on your phone to a contact. There are two ways of forwarding your calls:
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