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•
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.
•
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 deviceis restarted.
•
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.
•
Starting RTP Port – set the initial local RTP port in the range of 64 ports used for audio
and video transmission. The default value is 4900 (i.e. the range is 4900–4963). The
parameter is only set for account 1 but applies to both the SIP accounts.
•
RTP Timeout – set the audio stream RTP packet receiving timeout during a call. If this
limit is exceeded (RTP packets are not delivered), the call will be terminated by the device.
Enter 0 to disable this parameter. The parameter is only set for account 1 but applies to
both the SIP accounts.
•
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.
Calls
•
General Settings – set the call time limit after which the call is automatically terminated.
The intercom signals termination with a beep 10 s before the call end. Enter any DTMF
character into the call (# on your IP phone, e.g.) to extend the call time.
2N® Indoor View User Manual
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