Add or edit connection

Use this dialog box to configure a connection through which the server can send and receive Session Initiation Protocol (SIP) messages.

Listening Address Settings

Specifies an IP address, listening port, and transport type for this server.

IP Address

The IP address that is associated with this Front End Server. The default is All, which we recommend if IP addresses in your environment are assigned dynamically or if your environment will use the fully qualified domain name (FQDN) to refer to the server instead. To refer to the server by using a single, specific IP address, click IP address, and then click the IP address that you want to use.

Port

The port on which the Front End Server receives SIP messages. By default, the conventional SIP ports are used.

Transport

Specifies the transport protocol that can be used to send messages to the Front End Server over this connection. There are three choices:

• TCP

  Messages sent to the server over this connection can use the Transmission Control Protocol (TCP). Messages sent using TCP are not encrypted.

• TLS

  Messages sent to the server over this connection can use the Transport Layer Security (TLS) protocol. Messages sent using TLS are encrypted.

• MTLS

  Messages sent to the server over this connection can use the Transport Layer Security protocol with mutual TLS (MTLS) authentication.

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You can configure multiple listening addresses, but to avoid conflicts you can configure only one for each transport type. When you configure a new listening address, ensure that you choose a port that is not already in use on the computer.

For details, see the Operations section of the Office Communications Server Technical Library.