Creating a SIP Domain

Applies to version(s): v3.0

In the Tmedia's configuration, a "SIP Domain" represents a domain name to which users can register to, and defines registrars to which Tmedia will forward registration requests to.

Creation of SIP domains is performed as follows:

1- Click SIP Domain in the navigation panel

2- Click Create New Domain

3- Create the new Domain:

• Enter a configuration Name for this domain.
• Enter a Domain Name for the SIP Registration Domain (domain can be a FQDN or an IP address)
• Set the number Maximum Registered Users for this domain
• Set the Expires value used by SBC when the remote device doesn't supply one (Default Contact Expire)
• Select Routing Method the system will use to route calls to registered users (if enabled in routing scripts).
  • Register source: Sends SIP Invite to the registering source IP address.
  • Contact: Sends SIP Invite to the 'contact' from the Register message.
• Set the Default Contact Expiration, this value will be used when no Expires value is supplied by the user agent.
• Set the Minimum Contact Expiration, this is the minimum Expires value that can be supplied by a user agent. Lower values will be rejected with a 423 'Interval too brief' response.
• Set the Maximum Contact Expiration, this is the maximum Expires value that can be supplied by a user agent. Higher value are replaced by this parameter.
• Forwarding Parameters:
  • Select the Registration Forwarding Mode to the registrar:
    • Contact Remapping: Changes the user and the IP address.
    • Contact Passthrough: Doesn't change anything. Enables devices to be contacted directly without going through the SBC.
  • Set Minimum Registrar Expiration, this is the minimum Expires value sent by the SBC to the registrar. If a user agent 'Expires' value is greater than this parameter, the SBC will do rate adaptation between the user agent and the Registrar.
  • Set Maximum Pending Register Forward, the maximum number of simultaneous pending register requests allowed for this domain. New REGISTER request are being refused passed this threshold.
  • Set Maximum Simultaneous Register Forward, the maximum number of simultaneous active register requests allowed for this domain. New REGISTER request are being refused passed this threshold.
  • Select the Registration Registrar Selection Mode to the registrar:
    • Active/Standby: The active registrar is the one with status up and the lowest priority (automatic fallback).
  • Enable the Forward After Switchover: After a switchover, the first register refresh request from each user will be forwarded to the active registrar.
• Click Create

4- Verify that the Sip registration domain was successfully created message appears

5- Add the domain to one or multiple NAPs from which users are allowed to register for this domain

• Click NAPs in the navigation panel
• Click on a NAP to bind the SIP Domain to
• Add the SIP Domain to the NAP (bottom of the page):