Mar 9, 2012 · I am developing a SIP application. A user agent can act as a client or a server, switching between the two roles as necessary. SIP proxies do not handle media; they simply deal with the SIP packets. The default is “Asterisk PBX”. A SIP phone is a User Agent, but the term also encompasses any other entity that uses SIP (for example: for a text chat, for sharing a whiteboard or for fax). This specification defines conferencing call control features for the Session Initiation Protocol (SIP). Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification. It can be used as a building block for SIP client software for uses such as VoIP, IM, and many other real-time and person-to-person communication services. X@anonymous. Dec 10, 2015 · SIP Proxy. xml. Also is used to generate the appropiate Ringing and Ok responses. Default value is "udp"; SIP_PASSWORD - Password of the SIP account. May 21, 2024 · There are 2 ways to configure HT841/HT881 when using with a SIP Server: With SIP accounts configured on the Channels page. By default, URI is set to anonymous. The User Agent is effectively the end system component for the call and has: React SIP user agent. See Sofia Configuration Files for an example sofia. In reality most deployments foresee a process called registration (method: REGISTER) which allows a central server (registrar) to s tore the location of a SIP User-Agent. By default, the WebSocket URI is set to wss://edge. Aug 2, 2022 · UA(User Agent): SIPでは端末のことをこう呼ぶ。 セッション：UAのIPアドレス、RTPで使用するport番号、メディアの符号化方式を纏めたもの SDP(Session Description Protocol):セッションの記述方法を規定したプロトコル. 3 [MicroSIP-3. js. Welcome and thank you for choosing the Cornfed SIP User Agent! The Cornfed SIP User Agent is a Session Initiation Protocol (SIP) based softphone for your IBMcompatible Personal Computer running the Linux operating system. Nov 22, 2016 · I have been playing with some tcpdump commands and egrep . retry register 10. Despite its simple command line appearance, it does pack many features! SIP features: Mutiple lines/identities (account registrations). Microphone mute. Set of WebSocket URIs to connect to. User Agent Server (UAS): A server application that receives the SIP request from a UAC, and returns a response to the request back to the UAC. An outbound Proxy: A proxy that receives requests from a client, even though it may not be the server resolved by the Request-URI. with the IETF RFC3261 specification. Call hold and resume. It is a form of identifying a communication resource. User Agent Delegate. Sofia is the general name of any User Agent in FreeSWITCH using the SIP network protocol. SIP UAS CALL INFO No. A UAS is a server application that contacts the user when it receives a SIP request. sip:bob@bigu. com) and Bob (sip:bob@biloxi. There are numerous types of SIP B2BUAs performing different roles in different ways; for example, IP Private Branch Exchanges (IPBXs), Session SIP C OMPONENTS A SIP network is composed of the following logical entities: User Agent (UA) -Initiates, receives and terminates calls. This happens in every SIP communication, even between two SIP Proxies, and has nothing to do with whether they are a SIP phone, a SIP Proxy, a B2BUA or any other kind of SIP device on a network. What “SIP user agent identification” can be used ? A user agent can play one of the following roles: User Agent Client (UAC): A client application that initiates a SIP request, such as INVITE, ACK, OPTIONS, BYE, CANCEL, and REGISTER. The UAS then returns a response on behalf of the user. 1080 Brcm Callctrl/1. SIP is a signaling protocol for managing multimedia Voice over Internet Protocol (VoIP) telephone calls. 59. The Sippy B2BUA is a SIP call controlling component. Soft User Agent, Soft UA A User Agent that runs as an application within some larger system that has responsibility for some of the steps described in this specification. There are two types of User Agents as follows. Oct 12, 2021 · I created a SIP client card for Home Assistant. The Request-URI User: INVITE sip: +14155552222 @example. In addition,SIPC provides some simple client side services such as call A "User Agent" ("UA") is an application used for running a certain network protocol. Asterisk Nov 28, 2023 · An AOR is a SIP identifier that looks something like sip:username@domain. Multiple calls. #13WXCommunicator. edu users, the calling party needs a SIP phone, or more precisely, a "SIP user agent. SIP is comprised of the following six elements in its architecture: • User Agent Client (UAC) • User Agent Server (UAS) • SIP Terminal • Proxy Server • Redirect Server • Location Server. May 17, 2024 · If it receives a request later, it assumes the role of a user agent server for the processing of that transaction. If not specified, port 80 User agents: The end system acts on behalf of a user. String - SIP URI associated to the User Agent. Contribute to havfo/SipCaller development by creating an account on GitHub. User Agent Server (UAS) − The entity that receives a request and sends a May 25, 2019 · SIP User Agent and SIP Servers There are some entities that help SIP in creating its network. TECH7Fox/HA-SIP: A SIP client inside home assistant! (github. 0 - Command Line SIP User Agent for Windows that enables users to make SIP-based calls from their PCs quickly and without significant efforts Jan 22, 2020 · A SIP user agent (UA) is a logical network end-point used to create or receive SIP messages and thereby manage a SIP session. credentials username username password your-password realm gw1. This header identifies the UA that is originating this request/response. invalid, where X is a random token generated for each UA. #15 IAXComm Feb 29, 2012 · Further, REGISTER requests use Contact headers to maintain SIP's location service: they let a user agent update a registrar's location information. JsSIP User Agent is the core element in JsSIP. WXCommunicator SIP Windows, C++, based on sipXtapi. Since the procedure defined by [ RFC5626 ] allows any UA to construct a value for this parameter, the sfua-id parameter MUST always be included. Multiple JsSIP User Agents can be created (this is useful for having different SIP accounts running in the same web application). It can be used as. Handles the message CSeq, Call-Id and User-Agent headers. When SIP. Reload to refresh your session. It is not possible to make "voip calls" with this tool - only SIP signalling is supported - no audio available. This is a simple SIP/VoIP application running on STM32F429ZI nucleo board (Cortex-M4, 256 kB RAM). 2. See also SIP Network Elements on wikipedia. PJSUA reference SIP Session Establishment This section details session establishment between two SIP User Agents (UAs): Alice and Bob. onsip. It sends a SIP request, such as an INVITE message, to establish the session. #12 Mirial Softphone. com. sip. A delegate can be attached to the user agent to receive the invitation. Usage examples: "click to call" in a web page - see Tutorial; send SIMPLE instant messages; send Message Waiting Indication NOTIFY RFC 5626 Client-Initiated Connections in SIP October 2009 1. 6. conf. CallId Calling# Called# RmtSignalIP RmtMediaIP dstCallId SIPState SIPSubState ===== 1 3239593 +15716063663 +18005532447 172. UA SIP Forum User Agent Configuration Parameter Registry IANA has established a registry for "SIP Forum User Agent Configuration Parameters". In accordance with RFC 2543-bis-04, the processing of 3xx redirection is as follows: † The uniform resource identifier (URI) of the redirected INVITE is updated to contain the new Nov 3, 2020 · I don't want use Sip User Agent because my server just send Legacy SDP from Janus Gateway to Asterisk server – Luyện Đức Mạnh Commented Nov 4, 2020 at 3:36 User Agent Server (UAS): A user agent server is a logical entity that generates a response to a SIP request. Introduction A user gets a new SIP User Agent (UA); it may be a hardware device or software. If it finds the port open, it attempts to brute force its way into your SIP server by testing sequential SIP account numbers with common usernames/passwords. The user agent header helps identify the originator of the request/response. that redirect response messages are used by SIP user agents to initiate a new Invite when a user agent learns that a user has moved from a previously known location. UA SIP User Agent Configurations - Cisco IOS XE Unified Communications VoIP products help you create configurations on a network device using APIs. In practical terms, this means that each SIP profile "listens" on a particular IP address and port Aug 13, 2005 · SIP user agent identification strings. Features: Call features: Unlimited number of SIP accounts. edu URI (e. Introduction Session Initiation Protocol (SIP) user agents vary widely in their capabilities and in the types of devices they represent. But these are not strictly separate physical entities. In this case, the HT841/HT881 act like an endpoint requesting registration from the SIP Server. tcpdump -i eth1 port sip -l -A | egrep -i 'User-Agent' i leave this running on asterisk pbx server and I can see all the useragents flow down the screen. A UAC initiates a SIP request. 1. us expires 360 refresh-ratio 20 auth-realm gw1. This is a SIP address given to you by your provider. MessageHelper: Structure to ease getting data from a Sip Message request. See the User Agent guide on how to create a user agent. Sep 25, 2020 · On trouvera ici une description du Protocole SIP comme boîte-à-outils. g. example. A SIP UA can perform the role of a User Agent Client (UAC), which sends SIP requests, and the User Agent Server (UAS), which receives the requests and returns a SIP response. SIP_SERVER_PORT - SIP port. us. Unattended call transfer. Can only be specified under the [general] section in sip. To send an ivite to a remote SIP endpoint use an Inviter. The syntax of this string is not defined, but a common practise is: <vendor> <product> <firmware version> List user agent strings here and link them to phone pages: Aastra 480i/1. You switched accounts on another tab or window. A User Agent is associated to a SIP user account. Simple, easy to use interface. Supports (Only) G. Copyright (c) 2010 - 2024 Alfred E. baresip is: A modular SIP user-agent with support for audio and video, and many IETF standards such as SIP, SDP, RTP/RTCP, STUN, TURN, and ICE. Many deployments of SIP user agents require dynamic configuration and cannot rely on pre-configuration. This guide requires a registered user agent. Construction. " UAS (User Agent Server) Refer to IETF RFC 3261 for the following definition. This is especially useful when an alarm notification is needed to send. In SIP, every network element is identified by a SIP URI (Uniform Resource Identifier) which is like an address. The Cornfed SIP User Agent is available in three forms: Source code Software Developer's Kit (SDK) The REGISTER method is used in Session Initiation Protocol (SIP) to allow a user agent (UA), such as a VoIP phone or a softphone, to register its location with a SIP registrar server. May 11, 2015 · Number of SIP User Agent Client(UAC) calls: 2. 5. 235 172. 10. Creating a JsSIP User Agent User Agent Configuration !Configure SIP user agent . 76 193. † User-agent server (UAS)—A server application that contacts the user when a SIP request is received SipCLI is a command line SIP (Session Initiation Protocol) user agent runs under Windows (Vista, 7/8/10/11, 2008-2022 Server) which enables making SIP (Based on RFC 3261) based calls. On décrira le concept d’AOR mais aussi on donnera une idée des rôles (UA, proxies, B2BUA), des requêtes (méthodes), des réponses et des messages du protocole SIP. 26 Sippy B2BUA is a RFC3261-compliant Session Initiation Protocol (SIP) stack and Back-to-back user agent (B2BUA). exe] (42 downloads), [MicroSIP-Lite-3. Sending an Invite. This means that Asterisk acts like a user 知乎专栏是一个自由写作和表达平台，让作者分享观点和知识。 SIP Components . Every SIP user agent (phone, software, device) identifies itself with a string. Once the Inviter is constructed - disabled sip contact rewrite - added User-Agent info on incoming call 3. This framework provides a standard means of providing dynamic configuration that simplifies deployments containing SIP user agents from multiple vendors. SIP Profiles The SIP Profiles in FreeSWITCH can lead to confusion. Distributed under BSD license. 04. Sep 29, 2023 · SIP message requests are critical to successfully utilizing SIP trunking technology. Any conferencing information is optionally conveyed to/from it using non-SIP means. You signed in with another tab or window. UA Sep 8, 2004 · useragent = <string> : Allow the SIP header “User-Agent” to be customized. Search syntax tips Provide feedback Once the two user agents have negotiated a successful call setup, the media is transported via the RTP protocol and sent directly between the two user agents. It represents the SIP client associated to a SIP account. Unlike a SIP proxy server, which only maintains transaction state, the Sippy B2BUA maintains complete call state and participates in all call requests. NamedHeader Sep 28, 2012 · User Agent Header: User-Agent: Cisco-CUCM8. The approach is explored from the perspective of different user agent (UA) types: conference-unaware, conference-aware, and focus UAs. 4] Cancel: ends a session request, i. Proxy Server - A Proxy Server can requests to multiple servers. exe] (27 downloads) - fixed dial number from command line - added option to execute command with CID as parameter on incoming call. Before we finish our discussion of SIP and the user directory, it would be good to touch upon a subject that some users initially find a bit daunting: SIP profiles. after the INVITE signal but once the session is established, the Structure to ease getting data from a Sip INVITE request. A back-to-back user agent (B2BUA) is a logical network element in Session Initiation Protocol (SIP) applications. The use of Uniform Oct 4, 2007 · pjsua is an open source command line SIP user agent (softphone) that is used as the reference implementation for PJSIP, PJNATH, and PJMEDIA. ) to be set by a user, and possibly stored locally in the User Agent. The user agent also maintains the WebSocket over which its signaling travels. It is able to establish and releases multiple calls with the INVITE and BYE methods. User Agent Client (UAC) − The entity that sends a request and receives a response. It is based on re/rem/baresip and other commercially-friendly (BSD/MIT licenses, e. This guide requires a user agent. Supports many SIP call, presence, instant messaging features, as well as TCP, IPv6, TLS, and STUN support. You can identify SipVicious because it sets its User-Agent in the SIP requests to friendly-scanner. The peers in a session are called user agents (UAs). Features. Aug 12, 2021 · Powered by Zoomin Software. SIP architecture contains two types of components: the User Agents and the servers [Fig. 001. Jun 17, 2013 · User Agent (UA): This is the SIP software that sits on endpoints like IP phones, or runs in IP telephony software on a computer or mobile device, sitting between the end user and the network. [1] : §8 A single user agent may act as both UAC and UAS for different transactions: [1] : p26 for example, a SIP phone is a user agent that will be a UAC when RFC 6011 SIP UA Configuration October 2010 1. , as separate windows or as separate applications. Home; Library; Avaya Links Some User Agents allow certain user specific settings (e. You can also set external IP address manually. Mirial Softphone Supports SIP and HD Quality, 720P video transmission. UA. For example, Sofia receives calls sent to FreeSWITCH from other SIP User Agents (UAs), sends calls to other UAs, acts as a Jan 18, 2023 · lgw-cube-rtr#show cube calls all SIP call leg info: ===== Total SIP call legs:2, User Agent Client:1, User Agent Server:1 SIP UAC CALL INFO No. The Route header will look like Route: <sip:example. PHP SIP is not a VoIP phone. The primary target platform for Sofia-SIP is. Enfin, on envisagera quelques scénarios classiques à étudier. For more details please contactZoomin. Creates a new SIP client and server combination user agent with a shared SIP transport instance. If the value is not specified, then it will use the name set for the user agent name. edu). Once the call is placed, the UA initiates SIP signaling to the destination domain's SIP proxy, and establishes voice The only term for such devices provided in RFC 3261 is for a Back-to-Back User Agent (B2BUA), which is defined as the logical concatenation of a SIP User Agent Server (UAS) and User Agent Client (UAC). JsSIP User Agent is defined in JsSIP. User agents and network servers use message requests to locate, invite, and manage calls. Bit of warning: SIP is memory intensive and actual memory usage is depending very much on traffic volume and Aug 16, 2016 · The User Agent making the request is called the User Agent Client and the User Agent receiving the request is called the User Agent Server. Auto answer. FreeRTOS v10) components. sip-ua. Sip Outbound Proxy. 0. This registry records the HTTPS request parameters for the initial configuration data request sent by a User Agent to a Configuration Service as described in Section 2. To create a new Inviter a valid UserAgent is required along with the target URI. Some User Agents have a user interface that can accept a username, password, and domain name. new SIP. User agents usually, but not necessarily, reside on a user's computer in form of an application--this is currently the most widely used approach, but user agents can be also cellular phones, PSTN gateways, PDAs, automated IVR systems and so on. Supports UPnP for NAT traversal. . This class requires some configuration parameters for its initialization which are provided through a configuration object. With a shared transport outgoing calls and registrations work the same but for incoming calls and requests the destination needs to be coordinated externally. userAgentString: "myAwesomeApp" The User-Agent header will look like User-Agent: SIP. A SIP proxy server receives a SIP request from a user agent or another proxy and acts on behalf of the user agent in forwarding or responding to the request. One UA (User Agent) can work as either UAC or UAS depending on situations. wsServerMaxReconnection You don’t have access to this content This content is for RingSense customers only. Internet end points that use SIP to find each other and to negotiate a session characteristics are called user agents. Twinkle SIP softphone for Linux users. Frequently, it is important for another SIP element to learn the capabilities and characteristics of a SIP UA. services. It could be a softphone, a mobile, or a laptop. UA Sofia SIP: A SIP library written in C for building SIP clients. Apr 8, 2010 · The "User-Agent" header field contains information about the user agent originating the request, which is often used by servers to help identify the scope of reported interoperability problems, to work around or tailor responses to avoid particular user agent limitations, and for analytics regarding browser or operating system use. 0 myAwesomeApp. It is recommended that user agents can invoke other tools for non-SIP URLs such as “rtsp” and “mailto”. We would like to show you a description here but the site won’t allow us. What is baresip. To make calls, a SIP URI is needed. SDP Extensions and Attributes SIP Trunk - Cisco Unified CallManager SIP Trunk signaling interfaces connect CallManager clusters with external SIP User Agents, such as SIP gateways, applications, and SIP proxy servers. The Cornfed SIP User Agent is a compact SIP softphone implementation designed specifically for embedded systems. User agents are logically divided into two parts −. UA class. A Sofia User Agent uses the SIP protocol. Call waiting Dec 12, 2018 · • SIP Reg User Agent Name — The name used in a REGISTER request. 16. User Agent. (LGPL) Back-to-Back User Agent: A back-to-back user agent (B2BUA) is a logical entity that receives a request and processes it as a user agent server (UAS). js receives a SIP INVITE from another endpoint, it is processeed by the UserAgent. The simplest user agent is able to dial in to a conference and to be invited to a conference. These elements are grouped as follows: User Agent. Unlimited number of calls. It scans IP ranges for SIP servers such as softswitches or PBXs, which communicate via the 5060 port. UA Dec 29, 2023 · Download SipCLI 2. This is a PHP implementation of a simple SIP user agent (UAS / UAC). A conference-unaware UA need only support RFC 3261 . 97. com) are assumed to be SIP phones or SIP-enabled devices. User Agent Client: A user agent acts as a user agent client • User Agent (UA)—A combination of user agent client (UAC) and user agent server (UAS) that initiates and receives calls. Baresip is a portable and modular SIP User-Agent with audio and video support. The UserAgent. You can use SipCLI for broadcast your recorded audio or text message to SIP/PSTN numbers. Examples of SIP register UA with sofia-sip, Search code, repositories, users, issues, pull requests Search Clear. wsServers. retry invite 2. User Agent Server (UAS) − The entity that receives a request and sends a Upon registration of the User – Agent – Client and the User SIP, the server is redirected and negotiation messages are transmitted for notification and referral to IP options [26]. Asterisk, on the other hand, is called a Back-To-Back User Agent (B2BUA). Introduction There are many environments for SIP [] deployments in which the User Agent (UA) can form a connection to a registrar or proxy but in which connections in the reverse direction to the UA are not possible. This document builds on the Conferencing Requirements and Framework documents to define how a tightly coupled SIP conference works. a building block for SIP client software for uses such as VoIP, IM, and many other real-time and person-to-person communication. RFC 3840 SIP Capabilities August 2004 1. Footprint is quite small (several hundreds KBs), and there is user agent reference implementation which uses gstreamer for the media. Enjoy! SIPob is a SIP (Session Initiation Protocol) outbound dialer that provides User Agent (SIP-UA) functions (Based on RFC 3261) for Windows (Vista, 7/8/10/11, 2008-2022 Server). IPv6 (added in version 1. 2, "Adding Configuration Request Sofia-SIP is an open-source SIP User-Agent library, compliant. Alice (sip:alice@atlanta. When I am registering on a SIP server through my android application the default user agent displayed by android on asterisk server is SIPAUA/0. You signed out in another tab or window. Once the call is placed, the UA initiates SIP signaling to the destination domain's SIP proxy, and establishes voice It may simplify the design of media agents if the SIP user agent also displays the participants for a call. us !Create dial-peer for outgoing calls . A user agent can register to receive incoming requests, as well as create and send outbound messages. A complete SIP URI has the format sip:user:password@host:port;uri-parameters?headers, but there are systems which can operate even with a SIP URI that provides only the host. timers connect 100. . CallId Calling# Called# RmtSignalIP RmtMediaIP dstCallId SIPState SIPSubState ===== 1 218174 anonymous 5360343 212. A design choice to be considered is how to handle several concurrent calls, e. A UA can function in one of the following roles: † User-agent client (UAC)—A client application that initiates the SIP request. 711 A - Mu law codecs. makeURI() helper can create a URI from a string. A user agent (or UA) is associated with a SIP user address and acts on behalf of that user to send and receive SIP requests. This is used to trick providers that block “Asterisk PBX” as SIP User agents. 6 . com) It is still work in progress, so bare that in mind. A "User Agent" ("UA") is an application used for handling a certain network protocol; the network protocol in Sofia's case is SIP. In the strictest sense of the word, a SIP profile in FreeSWITCH is a User Agent. 1 of "Managing Client-Initiated Connections in the Session Initiation Protocol (SIP)". Mar 24, 2015 · Friendly-scanner (which isn’t really friendly at all) is a type of botnet. UA A simple, intuitive, and powerful JavaScript signaling library - onsip/SIP. In this trace we can see that the UA above is CUCM version 8. 104. (As an aside, if Alice calls Bob, the Contact header needs to be in a 2xx response so that Alice can route the 2xx's ACK to Bob. MessageWriter: Structure to help when sending Sip messages. description **Outgoing Calls to SIP. The response accepts, rejects, or redirects the request. If this is set then the User-Agent header will have this string appended after name and version. The Cornfed SIP User Agent allows you to make Internetbased telephone calls using To call SIP. UAC (User Agent Client) : UAC is the party that generates requests and send those to servers Oct 6, 2018 · SIPp is an open source SIP protocol test tool/traffic generator which includes a few basic SipStone user agent scenarios (UAC and UAS). Applications which handle SIP calls, but do not need to register SIP endpoints or use line-specific SIP features can be implemented using SIP trunks. SIP message requests use SIP headers to supply information about the requested action or information. Heggestad and Contributors. A simple // Create a user agent client to establish a session const inviter User agents are the most intelligent device or network element of a SIP network. If the user–agent initiates SIP requests, it is called user–agent client (UAC); a user–agent server (UAS) receives such requests and return responses. 2) SIP requests and responses may be generated by any SIP user agent; user agents are divided into clients (UACs), which initiate requests, and servers (UASes), which respond to them. 9. A SIP server, also known as a SIP proxy, manages all SIP calls within a network and takes responsibility for receiving requests from user agents for the purpose of placing and terminating calls. 3. STM32 SIP User Agent. Under the Channels webpage, you will need to fill in information like SIP User ID, Password, etc. GNU/Linux. , Contact Directory, specialized ring- tones, etc. After the address has been registered and a new user agent starts up, it sends a SIP REGISTER message to its configured registrar server. js/0. org:8443;lr;transport=ws> userAgentString. pstn The Contact header provides a SIP or SIPS URI that should be used to contact the user agent that sent Jul 26, 2018 · SIP is a peer-to-peer protocol where the roles client – server and exchangeable depending on who starts a session. User agents are the most intelligent device or network element of a SIP network. In this tutorial we learn how to install baresip on Ubuntu 20. #14 Twinkle. SIP. US SIP Mar 28, 2024 · The URN identifying the User Agent, constructed as specified in section 4. The default value is set to blank. Here, the username is always a unique name, and the domain is typically the VoIP domain of the business. Setup is ini file CmdIncomigCall. UA To call SIP. • Network servers: There are three types of servers in a network: (1) Jan 12, 2011 · Sofia-SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification (see the feature table). e. Check the full UA Configuration Parameters list. dial-peer voice 2 voip. SIP is a peer-to-peer protocol. User Agent Server (UAS) – A UAS receives the SIP request and generates a response to it. 40 Oct 12, 2023 · The two primary types of user agents in SIP are: User Agent Client (UAC) – A UAC initiates a SIP session, such as making a VoIP phone call. “A user agent server is a logical entity that generates a response to a SIP request. 235 3239592 STATE_ACTIVE SUBSTATE_NONE Number of SIP User Oct 28, 2013 · The publicly available SipVicious script that many of these attackers use stops the attack instantly if it receives an invalid SIP response with no From: line. A back-to-back user agent operates between both end points of a communications session and divides the communication channel SIP. For example, when you receive a Introduction. Remaining parameter, SIP username should be set as command-line argument of script (listed in the usage section) Nov 4, 2008 · Users can use the softphone to make Audio, Audio & Video calls and conference among these networks. This framework also addresses change notifications when profiles change. SDPの付与箇所 Jul 19, 2016 · Figure 5: Example of a simple SIP call between user agents. 1 MxSF/v3. SIPC can handle a call session to another SIP user agent, register the contact informationto a SIP registrar server, work as a presence agent for the user, maintain a instant message session between another SIP user agent and control X10 devices through SIP-X10 gateway. Default value is "5060"; SIP_TRANSPORT - SIP transport: udp, tcp or tls. This role lasts only for the duration of that transaction. " The SIP user agent provides an interface, which the caller uses to enter an alphanumeric SIP. 227. With this you can make calls to other HA clients and sip devices. Such a user agent would not usually host a conference (at least, not using SIP explicitly). In order to determine how the request should be answered, it acts as a user agent client (UAC) and generates requests. registrar 1 dns:gw1. pm jj yh kt kh qb jl qk iv ca