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The Avaya SIP Softphone is a flexible SIP endpoint that uses SIP for telephony, enterprise instant messaging and presence. It supports a rich suite of SIP-based telephony features and can be integrated with Microsoft Outlook, Lotus Notes, LDAP and Microsoft Internet Explorer. It can be used in any of the following three modes of operation.
1. Peer-to-peer mode with no SIP infrastructure.
This mode of operation requires no SIP proxy or registration server. It is a free-ware version requiring no purchased user license. It supports a basic set of telephony and instant messaging features between SIP Softphone users. One limitation of this implementation is that there is no name resolution - that is, users must know the called party's IP address to contact them via SIP Softphone.
2. Industry-standard SIP endpoint with 3rd party SIP infrastructure.
In this environment, SIP Softphone interoperates with 3rd party SIP proxy, registrar and endpoints. In this case the SIP softphone will implement the complement of standards-based SIP features (SIPPING 19) that the rest of the infrastructure supports. Thus the SIP softphone can augment existing, standards-compliant SIP installations.
3. Endpoint of Avaya SIP Solution with Avaya SIP Enablement Services and Avaya Communication Manager.
This implementation leverages the Personal Profile Manager capability of Avaya SIP Enablement Services to provide a network-based contact store and access control lists for SIP Softphone users. It also provides server-based presence, message-waiting indication and enhanced secure communications between the SIP Softphone and SIP Enablement Services
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