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SIP Proxy registration

The steps in this article require using the web interface of a 2N device. Please follow this manual in case this is your first time using the web interface.

 

2N IP Intercom can be registered to SIP Proxy (PBX) and dial its extensions like you know from an IP phone, using the extension number.

Direct call without SIP Proxy registration is described in this article: Direct call without SIP Proxy registration

 

Prerequisites

  • 2N IP Intercom with the latest firmware,
    no additional license is required.

  • SIP Proxy registration details

  • For calling you need extension number of another SIP device registered under the same SIP Proxy.

 

Explanation of IP Telephony Terms

  • SIP (Session Initiation Protocol)
    A phone call signalling transmission protocol used in IP telephony. It is primarily used for setting up, terminating and forwarding calls between two SIP devices (the intercom and another IP phone in this case). SIP devices can establish connections directly with each other (Direct SIP Call) or, typically, via one or more servers: SIP Proxy and SIP Registrar.

    2N IP Intercoms support three ways of SIP signalling:

    • User Datagram Protocol (UDP),
      the most frequently used unsecured signalling method.

    • Transmission Control Protocol (TCP),
      less frequent, yet recommended unsecured signalling method.

    • Transaction Layer Security (TLS),
      where SIP messages are secured against third party monitoring and modification.

  • SIP Proxy
    IP network server responsible for call routing (call transfer to another entity closer to the destination). There can be one or more SIP Proxy units between the users.

  • SIP Registrar
    An IP network server responsible for user registration in a certain network section. As a rule, SIP device registration is necessary for a user to be accessible to the others on a certain phone number. SIP Registrar and SIP Proxy are often installed on one and the same server.

  • RTP (Real-Time Transport Protocol)
    A protocol defining the standard packet format for audio and video transmission in IP networks. 2N IP Intercom uses the RTP for audio and video stream transmission during a call. The stream parameters (port numbers, protocols and codecs) are defined and negotiated via the SDP (Session Description Protocol).

 

 

Click here for instructions for firmware 3.0 and newer

Read more about the differences in long-term support and active track 2N OS.

Firmware 2.50 and older (LTS)

SIP Proxy registration

2N IP Intercom allows two independent SIP accounts to be configured. Thus, it can be registered under two extension numbers, with two different SIP exchanges and so on. Both the SIP accounts process incoming calls equivalently. Outgoing calls are primarily processed by account 1, or, if account 1 is not registered (due to SIP exchange error, e.g.), by account 2. You can also select the preferred account number for outgoing calls in the user settings.

  • Go to 2N IP Intercom web interface, section Calling - SIP 1 (or SIP 2) - Configuration.
    • Enable SIP Account.

    • Fill in Device Identity.
      • Display Name ... name to be displayed on the called party´s phone.
      • Phone Number (ID) ... unique identification (extension) under SIP Proxy.
      • Domain ... domain name of the registration service, typically the same as SIP Proxy and Registrar address. 

    • Fill in Authentication.
      • Authentication ID ... alternative user ID for the authentication; if empty, Phone Number (ID) will be used.
      • Password ... the password for authentication under PBX.

    • Fill in SIP Proxy.
      • Proxy Address ... SIP Proxy IP address or domain name.
      • Proxy Port ... SIP Proxy port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).
      • Backup Proxy Address ... SIP Proxy IP address or domain name when the main proxy fails to respond.
      • Backup Proxy Port ... backup SIP Proxy port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).

    • Fill in SIP Registrar.
      • Registration Enabled ... enable intercom registration with the set SIP Registrar.
      • Registrar Address ... the SIP Registrar IP address or domain name.
      • Registrar Port ...  SIP Registrar port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).
      • Backup Registrar Address ... SIP Registrar IP address or domain name when the main proxy fails to respond.
      • Backup Registrar Port ... backup SIP Registrar port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).
      • Registration Expiry ... the registration expiry affecting periodically sent registration requirements.
      • Registration State – see the current registration state (unregistered, registering..., registered, unregistering...).

    • If needed, there are also other advanced parameters, incl. SIP Transport Protocol selection.

2N IP Intercom - Calling - SIP 1

 

 

Assign the called device to the user

We can now assign an extension to the user according to a dialling plan of the SIP Proxy server.

  • Go to the 2N IP Intercom web interface, section Directory - Users
    and open the existing user or create a new one by clicking the Add User button.

2N IP Intercom - Directory - Users - Add User

  • Find the section User Phone Numbers and fill in the Phone Number parameter
    by the extension number     of the called device in format extension/used SIP account.

    Examples: 
    • 199/1 to call 199 by SIP 1 account
    • 199/2 to call 199 by SIP 2 account

2N IP Intercom - Directory - Users - Phone number

 
  • If you wish to start the call by pressing the button, you need to assign the user to the button
    in section Calling - Dialing - Quick Dial Buttons.

2N IP Intercom - Calling - Dialing 

 

Firmware 3.0 and newer

SIP Proxy registration

2N IP Intercom allows four independent SIP accounts to be configured. Thus, it can be registered under four extension numbers, with four different SIP exchanges and so on. All the SIP accounts process incoming calls equivalently. Outgoing calls are primarily processed by account 1, or, if account 1 is not registered (due to SIP exchange error, e.g.), by account 2, etc.. You can also select the preferred account number for outgoing calls in the user settings.

  • Go to 2N IP Intercom web interface, section Calling - SIP 1 (or SIP 2/3/4) - Configuration.
    • Enable SIP Account.

    • Fill in Identification in network.
      • Display Name ... name to be displayed on the called party´s phone.
      • Phone Number (ID) ... unique identification (extension) under SIP Proxy.
      • Domain ... domain name of the registration service, typically the same as SIP Proxy and Registrar address.
      • Authorisation ID ... alternative user ID for the authentication; if empty, Phone Number (ID) will be used.
      • Password ... the password for authentication under PBX.

    • Fill in SIP Proxy.
      • Proxy Address ... SIP Proxy IP address or domain name.
      • Proxy Port ... SIP Proxy port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).
      • Backup Proxy Address ... SIP Proxy IP address or domain name when the main proxy fails to respond.
      • Backup Proxy Port ... backup SIP Proxy port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).

    • Fill in SIP Registrar.
      • Allow Registration ... enable intercom registration with the set SIP Registrar.
      • Registrar Address ... the SIP Registrar IP address or domain name.
      • Registrar Port ...  SIP Registrar port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).
      • Backup Registrar Address ... SIP Registrar IP address or domain name when the main proxy fails to respond.
      • Backup Registrar Port ... backup SIP Registrar port, in default using 5060 (for UDP, TCP) or 5061 (for TLS).
      • Registrar Expiration Time ... the registration expiry affecting periodically sent registration requirements.

    • If needed, there are also other advanced parameters, incl. SIP Transport Protocol selection.

2N IP Intercom - Calling - SIP 1 

 

 

Assign the called device to the user

We can now assign an extension to the user according to a dialling plan of the SIP Proxy server.

  • Go to the 2N IP Intercom web interface, section Directory
    and open the existing user or create a new one by clicking the Add record button.

2N IP Intercom - Directory - Add record

  • Find the section Phone Numbers and fill in the Phone Number parameter
    by the extension number     of the called device in format extension/used SIP account.

    Examples: 
    • 199/1 to call 199 by SIP 1 account
    • 199/2 to call 199 by SIP 2 account

2N IP Intercom - Directory - Users - Phone number

 
  • If you wish to start the call by pressing the button, you need to assign the user to the button
    in section Calling - Dialing - Quick Dial Buttons.

2N IP Intercom - Calling - Dialing  

 
 

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