Axis M3037-PVE User Manual page 38

AXIS M3037-PVE Fixed Dome Network Camera
Voice over IP (VoIP)
Note
Even if you choose to not enable SIP, you can configure the SIP settings. But remember that when SIP is disabled, you
cannot make or receive calls.
SIP Setup Assistant
The SIP Setup Assistant helps you with the SIP configuration. After completing all the steps in the setup assistant, the product is
ready to perform basic VoIP actions, such as making a call when the call button is pressed. Each time you finish the SIP setup
assistant, new action rules and DTMF rules will be created.
Port Settings
• SIP port – Enter the port used for SIP sessions. The signalling traffic through this port will be non-encrypted. The default
port number is 5060.
• SIP TLS port – Enter the port used for SIPS sessions and TLS-secured SIP sessions. The signalling traffic through this port
will be encrypted using Transport Layer Security (TLS). The default port number is 5061.
Network Address Translation (NAT) Traversal (port forwarding)
Use NAT traversal when the Axis product is connected to the network behind a NAT router or firewall device.
VoIP services require clients to be servers as well, and many VoIP services carry IP address and port information in the application
data. Therefore, Axis products behind Network Address Translation (NAT) devices such as network routers need to use special
protocols for NAT traversal (port forwarding) so that calls can be linked to the correct host.
Without SIP-specific port forwarding, users of clients within the same private network would be able to talk to each other but
users of clients in different networks would not.
The following NAT traversal settings are available:
• STUN – Session Traversal Utilities for NAT (STUN). See page 38.
• TURN – Traversal Using Relays around NAT (TURN). See page 39.
• ICE – Interactive Connectivity Establishment (ICE). See page 38.
Each NAT traversal protocol can be used separately or in different combinations depending on the network environment.
Note
These settings are SIP specific. For more information about the product's general NAT traversal settings, see NAT traversal
(port mapping) for IPv4 on page 59.
Interactive Connectivity Establishment (ICE)
Interactive Connectivity Establishment (ICE) enables the product to send a request that includes multiple addresses to the receiving
device. In its response, the receiving device also includes multiple addresses. Through a process of connectivity checks, also called
handshakes, the channel for communication is established.
ICE increases the chances of finding the most efficient path to successful communication between peer devices. If you also enable
STUN and TURN, you improve the ICE protocol's chances of finding the most efficient path to successful communication.
To use the ICE protocol for NAT traversal, select Enable ICE.
Session Traversal Utilities for NAT (STUN)
Session Traversal Utilities for NAT (STUN) is a client-server network protocol that enables the product to ask a STUN server on the
Internet for a mapped public IP address. The STUN server response includes this IP address and port so that the client can use them
in its SIP messages to other hosts and clients.
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