In this section:

This section describes the steps to enable the transparent mode support for registering clients, using B2BUA.

Configure the VoIP Settings

  1. Select VoIP from the Configuration Menu on the left-hand side. 

  2. Configure the system’s VoIP settings.


     

    Configuring VoIP Parameters

    ParameterExample Configuration Value
    Enable LLDPEnabled (default)
    LLDP Broadcast Interval (sec)30 (default) 
    TFTP Server IP AddressDisabled
    Use ALG Alias IP AddressesDisabled
    Do Strict RTP Source CheckDisabled
    Enable Client List LockdownDisabled
    Allow Shared UsernamesDisabled
    Strip G.729 from CallsDisabled
    Route all SIP Signalling Through B2BUAEnabled
    Enable Microsoft FeatureDisabled
    Enable Comfort Noise Generation (CNG)Disabled
    Enable User-Agent Header Pass-ThroughDisabled
    Enable SRTP SupportDisabled
    Enable MKI SupportDisabled Note: This is optional. This depends on whether or not MKI support is enabled on MS Teams.
    H.225/H.245 Port Range14085-15084 (default)
    RTP Port Range16386-18385 (default)
    RTP Packetization Time (ms)20
    Prioritize Microsoft TeamsNot Required for MS Team. The system will automatically prioritize signaling and media. This setting is used when the system is “NATing” MS Teams traffic.
    Calculate RTTEnabled (default)

Configure the SIP Settings

  1. Select VoIP > SIP from the Configuration Menu on the left-hand side.

  2. Configure the SIP Server Settings for the B2BUA transparent mode support.


     

    Configuring SIP Server Settings Parameters

    ParameterExample Configuration Value
    SIP Server Addresssiptrunk.example.com
    SIP Server Port

    5060

    (Verify with your SIP trunking provider which SIP port to configure.)

    Note: If the FQDN resolves to a different port for the SIP Server Address the system will use the port returned in the DNS query response.
    SIP Server TransportUDP
    Enable SRTPDisabled
    Use Custom DomainDisabled
    SIP Server DomainNot set
    List of SIP ServersNone
    Enable Multi-homed Outbound Proxy ModeDisabled
    Enable Transparent Proxy ModeEnabled
    Limit Outbound to Listed SIP ServersEnabled
    Limit Inbound to Listed SIP ServersEnabled
    Include UPDATE in AllowEnabled
    PRACK SupportEnabled
    GEOLOCATION SupportDisabled
    Call Audit SupportDisabled
    B2BUA Redirect Support (302)Enabled
    Session Timer SupportDisabled
    Session Refresh Interval (s)1800 (default)
    UDPClient Listening Port(s)5060,5070,5075 (default)
    UDPServer Facing Port5060 (default)
    UDPREGISTER Restricted to Port0 (default)
    TCPPort5060 (default)
    TCPTimeout (minutes)10 (default)

    NAT Traversal

    		Disabled (default)
    SDP Codec OperationAllow only given codecs
    SDP Section that will be modifiedAudio
    Codecs (comma separated list)PCMU, PCMA, CN, telephone-event
    Reject when No Match CodecEnabled
    Strip Matched Expressions

    \ba=candidate:.*\b

    a=rtcp-mux

    \ba=ice-.*\b

    SIP Use New Port On Hold ResumeDisabled

    Priority Number 1:

    Priority Number 2:

    Priority Number 3:

    Priority Number 4:

    		Not set
    Enable SIP StatisticsEnabled
     

  3. Click Submit to apply changes.
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