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VoIP Domain - SIP Proxy

What can I do here?

Use this window to create or edit a SIP Proxy (also known as a SIP server or Registrar).

Getting Here

Getting Here - Object Explorer > New > Network Object > More > VoIP Domain > SIP Proxy

VoIP Domains

There are five types of VoIP Domain objects:

In many VoIP networks, the control signals follow a different route through the network than the media. This is the case when the call is managed by a signal routing device. Signal routing is done in SIP by the Redirect Server, Registrar, and/or Proxy. In SIP, signal routing is done by the Gatekeeper and/or gateway.

Enforcing signal routing locations is an important aspect of VoIP security. It is possible to specify the endpoints that the signal routing device is allowed to manage. This set of locations is called a VoIP Domain. For more information refer to the R80.10 VoIP Administration Guide.

Supported SIP Deployments and NAT Support

The table shows a list of supported SIP deployments. NAT (Hide or Static) can be configured for:

 

No NAT

NAT for Internal Phones —
Hide/Static NAT

NAT for Proxy —
Static NAT

Endpoint to Endpoint

Yes

Static NAT only

Not applicable

SIP Proxy in External

Yes

Yes

Not applicable

SIP Proxy to Proxy

Yes

Yes

Yes

SIP Proxy in DMZ

Yes

Yes

Yes

The Proxy refers to a SIP proxy and/or registrar. If there is more than one proxy device, signaling passes through one or more Proxies or Registrars. After the call has been set up, the media passes from endpoint to endpoint, directly or through one or more Proxies.

SIP Endpoint-to-Endpoint Topology

The IP Phones communicate directly, without a Proxy. Static NAT can be configured for the phones on the internal side of the gateway.

SIP Proxy in External Network

The IP Phones use the services of a Proxy on the external side of the gateway. This topology enables using the services of a Proxy that is maintained by another organization. It is possible to configure Hide NAT (or Static NAT or no NAT) for the phones on the internal side of the gateway.

SIP Proxy to SIP Proxy

Each Proxy controls a separate endpoint domain. Static NAT can be configured for the internal Proxy. For the internal phones, Hide NAT (or Static NAT) can be configured.

SIP Proxy in DMZ

The same Proxy controls both endpoint domains. This topology makes it possible to provide Proxy services to other organizations. Static NAT (or no NAT) can be configured for the Proxy. Hide NAT (or Static or no NAT) can be configured for the phones on the internal side of the gateway.

Additional Conditions for Using NAT in SIP Networks

You can use SIP with NAT with these exceptions: