Call Features151Parameter features.dnd.feature_key_sync.enable .cfgDescriptionIt enables or disables the DND feature synchronization.Note: It works only if “features.feature_key_sync.enable” is set to 1 (Enabled).Permitted Values0-Disabled1-Enabled, server-based DND is enabled. Server and local phone DND are synchronized.Default 1Call HoldCall hold provides a service of placing an active call on hold. It enables you to pause activity on an active call so thatyou 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 stopsending media and to inform them that they are being held. IP phones support two call hold methods, one is RFC 3264,which sets the “a” (media attribute) in the SDP to sendonly, recvonly or inactive (for example, a=sendonly). The other isRFC 2543, which sets the “c” (connection addresses for the media streams) in the SDP to zero (for example, c=0.0.0.0).TopicCall Hold ConfigurationCall Hold ConfigurationThe following table lists the parameters you can use to configure call hold.Parameter sip.rfc2543_hold .cfgDescription It enables or disables the IP phone to use RFC 2543 (c=0.0.0.0) outgoing hold signaling.PermittedValues0-Disabled, SDP media direction attributes (such as a=sendonly) per RFC 3264 is used when placing acall 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 0Web UI Features->General Information->RFC 2543 HoldParameter account.X.hold_use_inactive[1] .cfgDescriptionIt 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).PermittedValues0-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 packetswill not be sent or received.Default 0[1]X is the account ID. X=1-8.Call ForwardYou can forward calls from any line on your phone to a contact. There are two ways of forwarding your calls:
