EXFO EXpert VoIP Test Tools - Manual (Page 51)

Test Setup
EXpert IP 45
Responder Setup
Proxy Settings

Force Proxy
If the Force Proxy check box is selected, the test routes all requests
associated with each call through the specified proxy server. The
Responder ignores any Record-Route or contact information contained
in the final response to the initial “SIP invite” request method.
If the Force Proxy check box is cleared (default), the test routes
subsequent requests in one of the following ways.

Using the Record-Route path, if specified

Directly to the peer endpoint via the contact information

Proxy IP Address/DNS: Port is the proxy IP address or DNS. IP address
can be in a dotted decimal notation (for example, 192.168.34.5) or in a
DNS name (for example, cm.acme.com) format. A maximum 60
characters are allowed.

Authentication User Name is the user name for the authentication for
the Controller, if the proxy server or registration server requires
authentication. A maximum 50 characters are allowed.

Authentication Password is the password for the authentication for
the Responder, if the proxy server or registration server requires
authentication. A maximum 64 characters are allowed.