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SIP protokol

Hosted SIP Extension versus Traditional SIP Trunk

SIP (Session Initiation Protocol - česky protokol pro inicializaci relací) je internetový protokol určený pro přenos signalizace v internetové telefonii. Normálně používá UDP port 5060, ale může fungovat i nad TCP /5060. První verzi protokolu popisoval dokument RFC 2543, současnou druhou verzi popisuje RFC 3261 What Is the SIP Protocol? The session initiation protocol (SIP), a popular internet telephony protocol, forms the foundation of all types of internet communication sessions. It establishes sessions, manages signaling, and terminates the connection when the sessions end A protocol is a set of universal standards for computer communication. A SIP session is any live communication, such as phone calls, conferencing, and even video. And initiation means the beginning Protokol pro navazování relací SIP (Session Initiation Protocol; původně RFC 2543, nahrazeno RFC 3261-3265, 3853) je jednoduchý obecný protokol pro navazování interaktivních komunikačních relací mezi dvěma či více koncovými zařízeními v Internetu, která si sám protokol je schopen vyhledat. SIP se používá samozřejmě nejen pro inicializaci, ale i modifikaci a ukončování interaktivních relací (tedy komunikace v reálném čase)

SIP Protocol: What Is & How It Works in a VOIP Call

Protokol za pokretanje sesije (eng. SIP - Session Initiation Protocol) je signalizacijski protokol koji se rabi radi uspostave, modificiranja i raskidanja višemedijskih sesija u mrežama zasnovanim na internetskom protokolu (IP networks). Razvilo ga je i standardiziralo Radno tijelo za razvoj Interneta (IETF - Internet Engineering Task Force), i ostala značajna međunarodna tijela prihvatila. SIP is defined as the application layer protocol that initiates, maintains, and terminates IP-based calls, chats and messaging. This means it handles SIP session management for audio calls, video conferences, and general various messaging applications. SIP is not the only way to power VoIP communications, but it is becoming the most prevalent way to do so VoIP, SIP protokol, 3.díl SIP (The Session Initiation Protocol) vlétl do telekomunikačního průmyslu jako bouře.Sesadil z trůnu H.323 protokol především svou jednoduchostí a filozofií, kde každý koncový člen spojení je si roven s ostatními, protokol nerozeznává rozdíly mezi nimi As with other protocols, SIP components fit under the device layer of Cisco CallManager architecture. As is true for the H.323 protocol, multiple logical SIP signaling interfaces can be configured in the Cisco CallManager database and associated with route groups, route lists, and route patterns

Dotaz: Jak zprovoznit VoIP SIP protokol za NATem. Poradil by mi někdo, jak zprovoznit VoIP pomocí SIP protokolu? Požívám program Xlite a harwarový telefon Well. Ani jeden se nepřipojí. Router je linuxí stroj, kde je nakonfigurován NAT. Prosím o nasměrování, jak dál. Zda existuje nějaký conntrack modul, nebo proxy SIP (Session Initiation Protocol) is a signalling protocol used to establish a session between 2 or more participants, modify that session, and eventually terminate that session. It has found its MAJOR use in the world of IP Telephony. The fact that SIP is an open standard has sparked enormous interest in the telephony market, and. SIP ovšem není jediný protokol pro VoIP, existují i další: Skype - proprietární protokol, úmyslně zmatený, aby se nedal snadno dekódovat, viz Silver Needle in the Skype H.323 - starší protokol, složitější než SIP, dnes se od něj ustupuj

Session Initiation Protocol, abrégé SIP, est un protocole de communication standard ouvert de gestion de sessions souvent utilisé dans les télécommunications multimédia (son, image, etc.). Il est depuis 2007 le plus courant pour la téléphonie par internet (la VoIP). SIP n'est pas seulement destiné à la VoIP mais aussi à de nombreuses autres applications telles que la visiophonie, la messagerie instantanée, la réalité virtuelle ou même les jeux vidéo en ligne A Session Initiation Protocol (SIP) egy internet-kommunikációs protokoll két vagy több résztvevő közötti kommunikációs kapcsolat felépítésére. A protokollt az RFC 3261 (korábban RFC 2543) szabvány írja le.A protokoll egyre inkább szabványossá válik az Internet-telefóniában (VoIP használatában).Technikai részlete RFC 3261 SIP: Session Initiation Protocol June 2002 The first example shows the basic functions of SIP: location of an end point, signal of a desire to communicate, negotiation of session parameters to establish the session, and teardown of the session once established. Figure 1 shows a typical example of a SIP message exchange between two users, Alice and Bob

This article describes how Direct Routing implements the Session Initiation Protocol (SIP). To properly route traffic between a Session Border Controller (SBC) and the SIP proxy, some SIP parameters must have specific values. This article is intended for voice administrators who are responsible for configuring the connection between the on-premises SBC and the SIP proxy service SIP-protokol: Tavsif. Kirish boshlash protokolining (SIP) signalizatsiya va multimedia aloqa seanslarini boshqarish uchun bir protokol hisoblanadi. eng keng tarqalgan Internet telefoniya arizalar - Audio va Video qo'ng'iroqlar va IP (Internet Protokol) orqali bir zumda xabar. Bu yaratish, tugatish, va qo'ng'iroq boshqa muhim elementlarini so. 對話啟動協定( Session Initiation Protocol ,縮寫 SIP )是一個由IETF MMUSIC工作群組開發的協定,作為標準被提議用於建立,修改和終止包括影片,語音,即時通訊,線上遊戲和虛擬實境等多種多媒體元素在內的互動式使用者對談。 2000年11月,SIP被正式批准成為3GPP訊號協定之一,並成為IMS體系結構的一個. Voice over Internet Protocol (zkratkou VoIP) je technologie, umožňující přenos digitalizovaného hlasu v těle paketů rodiny protokolů UDP/TCP/IP prostřednictvím počítačové sítě nebo jiného média, prostupného pro protokol IP.. Využívá se pro telefonování prostřednictvím Internetu, intranetu nebo jakéhokoliv jiného datového spojení

An Introduction to SIP Protocol: Definition, Features, & Mor

  1. ating sessions with one or more participants. • Can be used for voice, video, instant messaging, ga
  2. Session Initiation Protocol (SIP) is used to signal and control interactive communication sessions. The uses for such sessions include voice, video, chat and instant messaging, as well as interactive games and virtual reality. The SIP protocol is increasingly being used to provide Voice over IP, Presence and Instant Messaging in Next Generation.
  3. ate the session, which also involves the exchange of data
  4. ate sessions with one or more participants. The SIP protocol is a member of the VOIPProtocolFamily
  5. SIP, the Session Initiation Protocol, is a signaling protocol for Internet conferencing, telephony, presence, events notification and instant messaging. SIP was developed within the IETF MMUSIC (Multiparty Multimedia Session Control) working group, with work proceeding since September 1999 in the IETF SIP working group

Secure SIP Protocols: UDP vs. TCP vs. TLS SIP Signaling & Security in Modern Communications Global enterprises are leaning on SIP (session initiation protocol) to better connect with their international customers. The modern contact center utilizes SIP to move real-time communications over the Internet through a technology called SIP trunking SIP (Session Initiation Protocol) An IETF defined protocol (RFC3261) that defines an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences SIP (Session Initiation Protocol) is a signaling protocol used to create, manage and terminate sessions in an IP based network. A session could be a simple two-way telephone call or it could be a collaborative multi-media conference session

Protokol SIP ve zkratce - Lupa

  1. ation and other essential elements of a call
  2. KRÁLOVSKÝ PROTOKOL ODHALEN: 50 pravidel, která musí rodina dodržovat. Pořád jen čtete, jak Meghan porušila tohle závažné pravidlo a Kate zase tohle, jak si dámy musí pokrýt ramena, že otevřené boty jsou striktně zakázané a důvodem, proč člen královské rodiny nesmí jít dary moře je potenciální smrt
  3. als. Although owned and controlled by 3M, the protocol is published and is widely used by other vendors. Version 2.0 of the protocol, known as SIP2, is a de facto standard for library self-service applications
  4. Le protocole SIP est un protocole texte, ressemblant beaucoup au protocole HTTP. Les messages sont sous forme de teste, et le mécanisme de requête-réponse permet un dépannage facile. La transmission des données elles-mêmes est effectuée par le Transmission Control Protocol (TCP) ou le User Datagram Protocol (UDP) au niveau 5 du modèle OSI

Session Initiation Protocol - Introductio

The Session Initiation Protocol is a signaling protocol that enables the Voice Over Internet Protocol (VoIP) by defining the messages sent between endpoints and managing the actual elements of a call. SIP supports voice calls, video conferencing, instant messaging, and media distribution. Check this blog post for in-depth information on SIP. The table below lists the header fields currently defined for the Session Initiation Protocol (SIP) [ RFC3261 ]. Some headers have single-letter compact forms (Section 7.3 of RFC 3261). Header field names are case-insensitive. Standard header fields and messages MUST NOT begin with the leading characters P-

Session Initiation Protocol (SIP) คือ โพรโทคอลหรือเกณฑ์วิธีเพื่อใช้งานด้าน. About the SIP Project 3M introduced the 3M™ Standard Interchange Protocol (SIP) in 1993. This protocol provided a standard communication mechanism to allow Integrated Library Systems (ILS) applications and self-service devices to communicate seamlessly to perform self-service transactions O Protocolo de Iniciação de Sessão (Session Initiation Protocol - SIP) é um protocolo de código aberto de aplicação, que utiliza o modelo requisição-resposta, similar ao HTTP, para iniciar sessões de comunicação interativa entre utilizadores. É um padrão da Internet Engineering Task Force (RFC 2543, 1999.). [1]SIP é um protocolo de sinal que serve para estabelecer chamadas. SIP stands for session initiation protocol. Session Initiation Protocol is a widely used telephony protocol that establishes a voice or audio media session over the telephone. SIP forms the foundation of any voice over internet protocol (VoIP) phone call, including voice calls, video conferencing calls, mobile calls and messaging

SIP Interview Questions Adding one more appreciation to the list. Well explained buddy :-) Just adding few cents of mine. The RTP/AVP is the Real time Transport protocol for Audio Video Profile and the fact why UDP is used is pretty straight forward - UDP has a very fast re-transmission rate even if a packet is lost(ex YouTube buffering) Session Initiation Protocol. SIP (Session Initiation Protocol) is a signaling protocol, widely used for setting up, connecting and disconnecting communication sessions, typically voice or video calls over the Internet.SIP is a standardized protocol with its basis coming from the IP community and in most cases uses UDP or TCP

The SIP protocol and OSI model - Building Telephony Systems with OpenSIPS - Second Edition. Introduction to SIP. Introduction to SIP. Understanding the SIP architecture. The SIP registration process. Types of SIP servers. SIP request messages. The SIP dialog flow. SIP transactions and dialogs protokol SIP pun ada urut-urutanya, untuk lebih jelasnya lihat gambar flow graph hasil dari proses percakapan antara user 100 dan 101 yang telah dilakukan berikut Pada gambar tersebut, terlihat jika yang melakukan panggilan adalah user 100. User 100 melakukan request :INVITE SIP ke server dan kemudian server membalasnya denga When SIP Protocol Support is enabled, no manual firewall rules are required. Masquerading Masquerading rules are still required if the networks on which the SIP clients are located cannot be routed publicly, such as the standard internal network ranges: 192.168../24, 172.16../16 - 172.31../16, and 10.0.0.0/8

Telefonujeme se SIP - Root

  1. The Session Description Protocol (SDP, RFC 4566, the translation from the English Session Description Protocol is not commonly used) is often embedded in SIP to negotiate the details of the video and/or audio transmission. The devices tell each other which methods of video and audio transmission they master (the so-called codecs), with which.
  2. SIP calling, or Session Initiation Protocol calling, the process of transmitting voice calls over a SIP trunk or a SIP channel. It's often interchanged with VoIP calls. However, SIP calling actually uses VoIP to move your analog call traffic over an internet connection. The easiest way to know what this means is to visualize it
  3. Mám dotaz na SIP protokol Dotaz: mám potíže s připojením přes pevnou linku O2- nejde mě plně Skype, jen chvíli slyším a vidím, na videohovorech a potřebuji bezplatně déle komunikovat, již jsem se na to tázal. Pro videohovory snad existuje nějaká komunikace přes SIP protokol což řeší problémové spojení, rychlost.
  4. ating sessions in the Internet These sessions may be text, voice, video or a combination of these SIP sessions involve one or more.

SIP - Session Description Protocol - Tutorialspoin

RFC 4566 SDP July 2006 3.Examples of SDP Usage 3.1.Session Initiation The Session Initiation Protocol (SIP) [] is an application-layer control protocol for creating, modifying, and terminating sessions such as Internet multimedia conferences, Internet telephone calls, and multimedia distribution.The SIP messages used to create sessions carry session descriptions that allow participants to. SIP protocol can be used in conjunction with other IP telephony protocols, PSTN protocols, and to communicate with the smart grid. SIP is a human-readable protocol, so SIP is simpler than H.323 when developing and supporting software. Google Trends information also confirms the popularity of this protocol The Valid8 SIP Conformance Test Suites are suitable for testing SIP protocol and interfaces in the wireless and wireline network including STIR/SHAKEN. What It Can Do For You. The Conformance solution is capable of simulating and testing various different devices: It can simulate. UA Session Initiation Protocol. SIP ( ang. Session Initiation Protocol) - protokół inicjowania sesji, zaproponowany przez IETF standard dla zestawiania sesji pomiędzy jednym lub wieloma klientami. Jest obecnie dominującym protokołem sygnalizacyjnym dla Voice over IP i stopniowo zastępuje H.323

The SIP protocol supports transport over TCP and UDP with each having its advantages and disadvantages. In addition, security considerations may drive you to consider the TLS protocol. We have designed this guide to help you understand the tradeoffs between alternative transport protocols and make the best decision for your communications service I am developing a push to talk app and I searched for possible protocols I can use. Those were H.323, MGCP and SIP. Also I came to know that the SIP is dominant over H.323 when it comes to the scalability but, I could not find anything that compares SIP and MGCP such that we can decide a clear winner

PROTOCOLS.CO SIP(Session Initiation Protocol,会话初始协议)是由IETF(Internet Engineering Task Force,因特网工程任务组)制定的多媒体通信协议。它是一个基于文本的应用层控制协议,用于创建、修改和释放一个或多个参与者的会话。SIP 是一种源于互联网的IP 语音会话控制协议,具有灵活、易于实现、便于扩展等特点 IP-Telefonie (kurz für Internet-Protokoll-Telefonie sowie Internettelefonie) oder Voice over IP (kurz VoIP; aus englisch voice over internet protocol, Sprachübertragung über das Internetprotokoll) genannt, ist das Telefonieren über Rechnernetze, welche nach Internetstandards aufgebaut sind. Dabei werden für Telefonie typische Informationen, mithin Sprache und Steuerinformationen. Session Initiation Protocol (SIP) is an ASCII-based, application-layer control protocol that can be used to establish, maintain, and terminate calls between two or more endpoints. SIP is an alternative protocol developed by the Internet Engineering Task Force (IETF) for multimedia conferencing over IP

SIP was marketed as a simple protocol, in spite of the fact it only looks simple on the surface. Telephony is a hard problem and, regardless of how one wants to deliver it, the total system is going to have a certain level of complexity out of necessity Protokol SIP pro pokročilé. Účastníci kurzu budou seznámeni s používanými metodami v protokolu SIP, s parsováním hlaviček, s významy jednotlivých polí v SIP a SDP, s pokročilými komunikačními scénáři a doplňkovými službami jako jsou zpětné volání, forking, přesměrování a novými možnostmi jako jsou presence, IM. SIP stands for Session Initiation Protocol and is a standard which describes how phone systems can establish calls, maintain the connection between phone systems so that voice and data can be transmitted when a call is active, and terminate the connection when the call is over. This involves the phone systems sending signals to each other, which contain instructions to begin a call, play-back. Sophos XG Firewall supports Session Initiation Protocol (SIP) for multimedia communications like VOIP. The SIP Module is enabled by default and provides the following functions for SIP traffic: Works on UDP port 5060. NATs local IP addresses to public IP addresses. Enables a dynamic voice channel by setting up an expected voice connection in.

SIP (protokol) — Википедиј

SIP Call Flow. Basic SIP session setup involves a SIP UA client sending a request to the SIP URL of the called endpoint (UAS), inviting it to a session. If the UAC knows the IP address of the UAS, it can send the request. Otherwise, the UAC sends the request to a proxy or redirect server to locate the user SIP as both a protocol and an architecture has a number of places where security can be applied. You can secure SIP signaling with Transport Layer Security (TLS). This encrypts the metadata of a call - e.g. who called who. You can secure the media of a session with SRTP - audio, video, etc. Sessio A recent report points out that it is possible to abuse Session Initiation Protocol (SIP) in order to deploy a cross-site scripting attack. Juxhin Dyrmishi Brigjaj of Enable Security mentions that this protocol, used to manage communications through services including VoIP, audio and instant messaging, can be used as a conduit for attacks based on software applications

SIP protokol detailněji Počítačová škola GOPA

SIP means Session Initiation Protocol. SIP. Session Initiation Protocol. Abbreviation is mostly used in categories: Technology Computing Technical Telecom Cable Telecommunications. Rating: 72. 72 votes SIP Definition. SIP stands for Session Initiation Protocol. It is a communication protocol organizations widely use to start and finish multimedia communication sessions, such as voice and video calls. SIP, therefore, is one of the specific protocols enabling VoIP. The Internet Engineering Task Force (IETF) is in charge of developing and. SIP is short for Session Initiation Protocol, an IP standard established by the Internet Engineering Task Force. SIP essentially dictates how a communications session is established and how it is terminated, initiating the connection between IP addresses. SIP technology can also send audio, images, video, and documents to support everyday voice.

SIP - Wikipedij

The Session Initiation Protocol (SIP) is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol (IP). SIP helps in establishing communication sessions which involve various media types such as audio, video, or collaborative multimedia The Session Initiation Protocol (SIP) is a signaling, presence and instant messaging protocol developed to set up, modify, and tear down multimedia sessions, request and deliver presence and instant messages over the Internet. SIP is a text-encoded protocol. Question 2. What Is Request-uri SIP is a text based control protocol intended for creating, modifying and terminating sessions with one or more participants. These sessions include Internet multimedia conferences, Internet telephone calls and multimedia distribution SIP is one of the signaling protocols of 3GPP which utilizes the Session Description Protocol (SDP) and also is a part of the IP Multimedia Subsystem (IMS) architecture. OdiTek's SIP Testing expertise is further enhanced by end-to-end testing capabilities within the 3G/4G/5G core networks SIP stands for (Session Initiation Protocol). It is a protocol that let applications easily set up outgoing and incoming voice calls, without having to manage sessions, transport-level communication, or audio record or playback directly

PPT - DISN Data Networks: Secret Internet Protocol Router

Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks Errata. 2002-12 18 pages: Informational RFC Updated by RFC5876, RFC8217: Allison Mankin : RFC 3326 (was draft-ietf-sip-reason) The Reason Header Field for the Session Initiation Protocol (SIP). The main Session Control Protocols in the IP network are H.323 and SIP. I've covered both of the protocols in detail in my previous articles, so if you're interested in learning more about them you can check them out here: Get to Know the H.323 VoIP Protocol Suite; Session Initiation Protocol: the Right Choice for VoI SIP: use a newer record for general-purpose mapping, SRV (RFC 2782) mapping from service and transport protocol to one or more servers, including protocols _sip._tcp SRV 0 0 5060 sip-server.cs.columbia.edu. SRV 1 0 5060 backup.ip-provider.net. _sip._udp SRV 0 0 5060 sip-server.cs.columbia.edu. SRV 1 0 5060 backup.ip-provider.net Xinyuan Wang, Ruishan Zhang, in Advances in Computers, 2011. 2.1 VoIP Signaling. Existing VoIP signaling protocols include Session Initiation Protocol (SIP) [2], H.323, and Media Gateway Control Protocol (MGCP) [3].SIP is an RFC standard from the Internet Engineering Task Force (IETF), and it is a generic signaling protocol for establishing sessions in an IP network

SIP Protocol 101: What it Is and How it Works GetVoI

Session Initiation Protocol (SIP) is a must for voice over IP (VoIP) communication. But by itself, SIP is insecure and easily hacked. Here's what you need to know to protect your calls and your. SIP is an extension of the IP protocol. Essentially, SIP is the future standard for communications of all kinds via a data network and its appeal lies largely in its simplicity: SIP sets up, handles and ends sessions over IP networks. A session could be a simple two-way telephone call or it could be a collaborative multi-media conference session SIP : Session Initiation Protocol (SIP) is a communications protocol that is widely used for managing multimedia communication sessions such as voice and video calls. SIP, therefore is one of the specific protocols that enable voice communication over IP. In a VoLTE call SIP protocol is used to create, modify and terminate sessions, essentially negotiating a session between two users Session Initiation Protocol. SIP ( ang. Session Initiation Protocol) - protokół inicjowania sesji, zaproponowany przez IETF standard dla zestawiania sesji pomiędzy jednym lub wieloma klientami. Jest obecnie dominującym protokołem sygnalizacyjnym dla Voice over IP i stopniowo zastępuje H.323 VoIP Protocols: SIP Call Flow. Vladimír Toncar . In this section, we will describe the the flow of a SIP call and show examples of SIP message exchanges. Registration. Before we describe the flow of a typical SIP call, let's have a look at how SIP user agents register with a SIP registrar

cuadro-comparativo-de-codecs – VoIP

VoIP, SIP protokol, 3

For NAT on SIP entities, it is strongly recommended that you enable the IPS protection Strict SIP Protocol Flow Enforcement. To enable the protection: Enable the IPS Software Blade on the gateway. In IPS > Protections > By Protocol > IPS Software Blade > VoIP > SIP > Protocol Anomaly > Strict SIP Protocol Flow Enforcement set the Action to Prevent See below Table as an example for Polycom Phones as a list of the ports currently used by the Polycom UC Software. Port Number Protocol Outgoing Incoming UDP or TCP 21 FTP Provisioning, Logs TCP 22 SSH Admin Admin TCP 23 Telnet Admin TCP 53 DNS UDP 67 DHCP Server UDP 68 DHCP Client UDP.. โปรโตคอล SIP (SIP: Session Initial Protocol) SIP เป็นโปรโตคอลใช้งานสำหรับ IP Telephony ที่กำหนดโดย IETF (Internet Engineering Task Force) SIP เป็นโปรโตคอลในชั้นแอปปลิเคชันซึ่งทำหน้าที่ในการสร้าง. SIP training, Session Initiation Protocol training course by TONEX provides an overview of SIP, its components, and how it works. It covers data networking principles to telco engineers and signaling principles to IP engineers. SIP course also outlines SIP implementations on the market in the form of single-line gateways, proxy servers, media. Protokol Çalışma Yapısı. SIP, yalnızca bir medya iletişim oturumunun sinyalizasyon kısmında yer alır ve sesli veya görüntülü çağrıları kurmak ve sonlandırmak için kullanılır. SIP, iki taraf (tek noktaya yayın) veya çok partili (çok noktaya yayın) oturumları oluşturmak için kullanılabilir

Understanding Session Initiation Protocol (SIP

Fusion Embedded™ SIP Stack. Embedded Session Initiation Protocol (SIP) Software Stack. The Fusion Embedded™ SIP stack is at the heart of Unicoi's Voice over Internet Protocol (VoIP) offerings, such as InstaVoIP.Fusion Embedded SIP software stack is a lightweight, transport-independent, text-based protocol suite designed for use in IP phones, VoIP gateways, RoIP devices, and other IP. Session Initiation Protocol (SIP) is a VoIP signaling protocol. As its name suggests, it has everything to do with setting up sessions, which means it has the responsibility for starting a session. Session initiation protocol overview. Android provides an API that supports the Session Initiation Protocol (SIP). This lets you add SIP-based internet telephony features to your applications. Android includes a full SIP protocol stack and integrated call management services that let applications easily set up outgoing and incoming voice calls. Check Sip Options noahguttman.wordpress.com. This plugin was created due to issues where Sipsak locks up when the proxy on the other end is not reachable. In addition this plugin has several features not found in other SIP OPTIONS check plugins. You can choose to accept any SIP packet as a vali. VoIP - náhrada pevné linky. - Možnost použití hardwarového IP telefonu podporujícího protokol SIP, bez nutnosti zapnutého PC. - Možnost použití softwarového IP telefonu podporujícího protokol SIP s použitím sluchátek a mikrofonu připojených k PC. - S telefonním přístrojem získá klient nové telefonní číslo

Jak zprovoznit VoIP SIP protokol za NATe

Application Layer Gateway for SIP Protocol. Using Large Scale NAT (LSN) with Session Initiation Protocol (SIP) is complicated, because SIP messages contain IP addresses in the SIP headers as well as in the SIP body. When LSN is used with SIP, the SIP headers contain information about the caller and the receiver, and the device translates this.

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