Lowest Allowed TLS Version – set the lowest TLS version to be accepted for device connection.
Verify Server Certificate – verify the SIP server public certificate against the CA certificates uploaded in the
device.
Client Certificate – specify the client certificate and private key used for verifying the intercom’s authority to
communicate with the SIP server.
Local SIP Port – set the local port for the device for SIP signaling. A change of this parameter will not be
applied until the device is restarted. The default value is 5060.
PRACK Enabled – enable the PRACK method for reliable confirmation of SIP messages with codes 101–
199.
REFER Enabled – enable call forwarding via the REFER method.
Send KeepAlive Packets – set that the device shall send STUN/CRLF packets to the registrar on a regular
basis and also SIP OPTIONS during calls to keep the setup connection active.
IP Address Filter Enabled – enable the blocking of SIP packet receiving from addresses other than SIP
Proxy and SIP Registrar. The primary purpose of the function is to enhance communication security and
eliminate unauthorized phone calls.
Receive Encrypted Calls Only (SRTP) – set that SRTP encrypted calls shall only be received on this
account. Unencrypted calls will be rejected. At the same time, TLS is recommended as the SIP transport
protocol for higher security.
Encrypted Outgoing Calls (SRTP) – set that outgoing calls shall be SRTP encrypted on this account. At the
same time, TLS is recommended as the SIP transport protocol for higher security.
Use MKI in SRTP Packets – enable the use of MKI (Master Key Identifier) if required by the counterparty for
master key identification when multiple keys rotate in the SRTP packets.
Adaptive Control of Video Quality – Enable the use of extended RTP profile for feedback via the RTCP
(RTP/AVPF). Enable the use of interactive video quality control according to RFC-4585 allowing for adaption
of the video data flow to the currently available network connection quality.
Do Not Play Incoming Early Media – disable playing of the incoming audio stream before the call sent by
some PBXs or other devices is picked up (early media). A standard local ringtone is played instead.
QoS DSCP Value – set the SIP packet priority in the network. The set value is sent in the TOS (Type of
Service) field in the IP packet header. Enter the value as a decimal number. A change of this parameter will
not be applied until the device is restarted.
STUN Enabled – enable STUN functionality for the SIP account. Address and ports acquired from the
configured STUN server will be used in SIP headers and SDP media negotiation.
STUN server address – set the IP address of the STUN server that will be used for this SIP account.
STUN server port – set the port of the STUN server that will be used for this SIP account.
External IP Address – set the public IP address or router name to which the device is connected. If the
device IP address is public, leave this parameter empty.
Broadsoft Compatibility Mode – set the Broadsoft PBX compatibility mode. Having received re-invite from
a PBX in this mode, the intercom replies by repeating the last sent SDP with currently used codecs instead
of sending a complete offer.
Rotate SRV Records – allow SRV record rotation for SIP Proxy and Registrar. This is an alternative method
of transition to backup servers in the event of main server failure or unavailability.
Software Configuration
35
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