SIP proxy

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SIP proxy

(Session Initiation Protocol proxy) A proxy server that allows SIP-based telephony packets to traverse the network's firewall. The SIP proxy takes over call control and provides address translation in order to direct calls to the appropriate phones within the network. Deployed in companies with many SIP phones, a SIP proxy offers a very comprehensive solution for enterprises. For example, it supports authentication, encryption, telecommuters and can even serve as backup for the PBX.

Stateless vs. Stateful
A stateless SIP proxy establishes the connection and gets out of the way. A stateful SIP proxy keeps track of the call and supports more sophisticated functions such as call routing and caller filtering. See SIP ALG, SIP and proxy server.
References in periodicals archive ?
Bulk VoIP resellers will benefit by opting for Ecosmob calling card solution development in that they will have access to a SIP server in addition to other services such as IVR, ticket management and billing.
The HT801 supports 1 SIP profile with redundant SIP server failover, a 10/100Mbps network port, 3-way conferencing per port, HD voice codec such as Opus, T.38 fax-over-IP, unique security certificate per device, dual firmware image for enhanced reliability, and support for a wide-range of caller ID formats for nearly all countries, among many other advanced telephony features.
The SIP server plays two vital roles; one is the utilization of location server to identify the location of the callee and the other is responsible for message routing.
Each SIP server in IMS needs to both reduce CAPEX and meet requirements for carrier grade high availability which is comparable to a PSTN switch.
The Diameter SIP Application allows a client of a SIP server to be authenticated and authorized by a Diameter server.
Combining WebRTC technology on top of the powerful Kamailio SIP server (with its presence module) allows Commodisee to bring shoppers both a private (one-way only video, no UserlD or login) and easily accessible (no extra software installation required) experience.
S-CSCF is an SIP server that registers users at IMS and manages the sessions.
While ordinary systems can be wiretapped by receiving the subscriber identification of the SIP server, for TLS based systems or for the proposed system, as a public key-based certificate is used, as long as the private key is not known by the attacker, wiretapping is not possible.
After evaluating several contact centre software vendors, the Altitude uCI suite was chosen based on its true multimedia blending capability, reliable SIP server software and out-of-the-box connectors for SAP," he added.
SIP server must be added as a proxy server for supporting the SIP signaling; in our simulation we choose the computer center building where to place the SIP server.
As previously explained, this paper considers SIP Server attacks.