SIP PBX line

These lines are used to configure connections to upstream SIP PBXs, which are usually connected via VPN.

LANconfig: VoIP Call Manager / Lines / SIP PBX lines

WEBconfig: LCOS menu tree / Setup / Voice Call Manager / Lines / SIP PBX

• Name Name of the line; may not be identical to another line that is configured in the device.
• DomainSIP domain/realm of the upstream SIP PBX.
• Rtg tag Routing tag for selecting a certain route in the routing table for connections to this SIP PBX.
• Port TCP/UDP port of the upstream SIP PBX to which the LANCOM device sends the SIP packets.
  Note: This port has to be activated in the firewall for the connection to work.
• SecretShared password for registering with the SIP PBX. This password is only required (a) when SIP subscribers have to log in to the PBX who have not been set up as SIP users with their own access data in the SIP user list or (b) when local SIP authentication is not forced. This means that SIP users can register with the LANCOM device without a password and can log in to the upstream SIP PBX with a shared password if the SIP user's domain is the same as the domain of a SIP PBX line.
• RegistrarThe SIP registrar is the point that accepts the login with the configured authentication data for this account in the SIP PBX.
• Cln prefix The call prefix is a number placed in front of the caller number (CLI; SIP "From:") for all incoming calls on this SIP PBX line in order to generate unique telephone numbers for return calls. For example; a number can be added, which the call router analyzes (and subsequently removes) to select the line to be used for the return call.
• Line prefixWith outgoing calls using this line, this prefix is placed in front of the calling number to create a complete telephone number that is valid for this line. With incoming calls this prefix is removed, if present.
• Codecs While the connection is being established, the terminal equipment concerned negotiate which codecs are to be used to compress the voice data. Use the codec filter to restrict the codecs that are permitted and to permit only certain codecs.
  Note: If no common the codecs can be agreed upon, no connection is made.
• Codec order This parameter influences the order in which the codecs are presented during connection establishment.
• Local port number This is the port used by the LANCOM proxy to communicate with the upstream SIP PBX.
  Note: If line (re-)registration is deactivated, the local port has to be defined with a fixed value, and this also has to be entered into the SIP PBX to ensure that both ends can send SIP signaling.
• (Re-) registration This activates the (repeated) registration of the SIP PBX line. Registration can also be used for line monitoring.
  Note: To use (re-) registration, the line monitoring method must correspondingly be set to "Register" or "Automatic". Registration is repeated after the monitoring interval has expired. If the SIP registrar in the SIP PBX suggests a different interval, the suggested value is used automatically.
• Line monitoring Specifies the line monitoring method. Line monitoring checks if a SIP PBX line is available. The Call Router can make use of the monitoring status to initiate a change to a backup line. The monitoring method sets the way in which the status is checked.
• Monitoring interval The monitoring interval in seconds. This value affects the line monitoring with register request and also the option request. The monitoring interval must be set to at least 60 seconds. This defines the time period that passes before the monitoring method is used again. If (re-) registration is activated, the monitoring interval is also used as the time interval before the next registration.
  Note: If the remote station responds to an option request with a different suggested value for the monitoring interval, this is accepted and subsequently applied.
• Trusted Specifies the remote station on this line (provider) as "Trusted Area". In this trusted area, the caller ID is not concealed from the caller, even if this is requested by the settings on the line (CLIR) or in the device. In the event of a connection over a trusted line, the Caller ID is first transmitted in accordance with the selected privacy policy and is only removed in the final exchange before the remote subscriber. This means, for example, that Caller ID can be used for billing purposes within the trusted area. This function is interesting for providers  using a VoIP router to extend their own managed networks all the way to the connection for the VoIP equipment.
  Note: Please note that not all providers support this function.
• Privacy method Specifies the method used for transmitting the caller information in the separate SIP field.
• Active Activates or deactivates the entry.
• Comment Comment on this entry.