Configuration manual for 2N IP intercoms
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Send KeepAlive Packets– define whether the intercom shall, during a call, send
periodical SIP OPTIONS requests toinquire about the state of the called station(to detect
the station failure, e.g.).
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 unauthorised 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
call pick-up (early media), which is sent by some PBXs or other devices.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. Value is entered in decimal format.
STUN Enable – 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 name of the router to which your
intercom is connected. If the intercom IP address is public, leave this field blank.
Compatibility with Broadsoft Devices – 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.
Tip
Recommended QoS DSCP Values
QoS decimal QoS hexadecimal Qos DSCP decimal (ToS)
Signaling
24 / 2624 / 26 18 / 1A18 / 1A 96 / 10496 / 104
Audio
4646 2E2E 184184
Video
4040 2828 160160
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