Address

The address of the proxy server used to place outbound calls.

This field is enabled only when you select the Proxy Server option.

Port

The port used by the proxy server.

This field is enabled only when you select the Proxy Server option.

Priority

When you configure more than one proxy server, this field determines the order in which outbound calls are sent to the list of proxy servers.

This field is enabled only when you select the Proxy Server option.

Weight

When you add more than one proxy server with the same priority value, this field determines the relative chances of which proxy server is used for an outbound call. The proxy server with the highest weight has the greatest odds of receiving a call.

For example, if proxy servers 1 and 2 are assigned a priority of 1, and weight of 4 and 6 respectively, then proxy server 1 has a 40% (4/(4+6)) chance of receiving a call while proxy server 2 has a 60% (6/(4+6)) chance.

This field is enabled only when you select the Proxy Server option.

DNS Server Domain

This is the domain name under which the SIP proxy list is configured in the DNS server.

This field is enabled only when you select the DNS Server Domain option.

Listener Port

The port used by the Listener.

The default for TCP is 5060, and the default for TLS is 5061.

SIP Domain

The domain in which the SIP connection is configured. The SIP domain must match the domain name of the connected proxy (that is the domain name in SIP URIs for incoming calls).

* (asterisk) means that all calls are routed to this trunk.

P-Asserted-Identity

The assumed identity used to determine the service class and the restriction permissions class for the SIP connection.

Maximum Redirection Attempts

The number of redirection attempts allowed before the call is considered to have failed. The MPP redirects a call when it receives a 302 response code from an INVITE request. This response code indicates that the endpoint which received the call has moved to another location, and the call should be redirected to the new location. The call continues to be redirected till either no further 302 response is received or the retry count is exhausted.

Consultative Transfer

If a connection cannot be established, Consultative Transfer allows Avaya Experience Portal to regain control of the call.

The following options determine the SIP messages used for a VXML Consultative Transfer:

SIP Reject Response Code

The response code that is sent to a SIP proxy when all SIP resources for an MPP are in use.

The options are:

• ASM (503): Sends a request to ASM to call another MPP that might be available.

• SES (480): Sends a request to SES to call another MPP that might be available.

• Custom: Allows custom response codes to be set for interoperability with other proxies and media gateways that might require a different response code to initiate a similar operation as stated above.

T1

Timer T1 is a general estimate of the maximum round trip time for SIP packets between the MPP and the proxy. It is used to determine the minimum retransmit interval for SIP messages.

T2

Timer T2 is the maximum retransmit interval for SIP messages. The T1 and T2 values are used together in an algorithm that backs off message retransmits in case of congestion.

B and F

Timers B and F are the transaction timeouts for INVITE and non-INVITE requests, respectively. They determine the amount of wait time before a SIP request is aborted, when no response is received.