sip to isup

In my previous article, I introduced how to use a SIP Soft Phone for direct calls. However, if many other users need to talk to each other, at the same time, authentication and control of User Account logon is required based on security considerations, in these cases, you need to establish a sipserver.Role of sipserver:Call control and processing functions, business provision/support functions, user management functions, protocol processing functions,

... 13 8.6.2.1 when the communication parties are at different levels of Nat... 14 8.6.2.2 related to the NAT type... 15 8.6.2.3 other cases... 16 8.6.2.4 peer reflexive in Internet p2p... 16 9 Application of ice in SIP... 16 9.1 both parties collect three groups of addresses ...... 17 9.1 A sends invite to B... 18 9.2 B returns 100, 101, 180 to a... 18 9.3 B returns 200 OK to a... 19 9.4 A returns ack to B... 19 Last week I wrote 1st, 2, 3, 4, and 5

I am responsible for custom development of the SIP/IMS video client and support access to the SIP Soft Interface.Switch, IMS core network, supportedVoice, video, and instant messaging functions. The video formats support h263, h264, and MPEG4 soft encoding solutions. The hardware coding/decoding interface is provided for interconnection and servers. If you are interested, contact me. Csdn lidp http://blog.

Haha. I 've talked about some SIP application scenarios. I will write some theoretical and boring things in the future. Before that, let's continue to make it easy to tell you a story about how to learn HTTP. At the very beginning, I took an HTTP book first. In short, it was a brick book. After reading the two chapters, we found that we should use the knowledge of TCP/IP. So let's look at TCP network programming. Two months later, I still don't kno

After OS X upgrades to El Capitan, it provides a security-related pattern called SIP (System Integrity Protection), also known as rootless mode, which is a new feature that emphasizes security for OS X, which prohibits the software from being used as root in Mac running on, upgrade to OS X 10.11 Maybe you'll see some apps are disabled so that/usr/bin folders we can't read and write properly, but it also causes some programs (such as homebrew and Git)

SIP Reply Message Status codeand featureType Status Code status descriptionTemporary response (1XX) Trying is in processRinging ringing181 call being forwarder is forward182 Queue Queue181* Session Progress SessionsSession success (2XX) OK session succeededRedirect (3XX) multiple multiple options301 Moved Permanently permanent mobile302 moved temporaily temporary movement305 Use Proxy User agent380 Alternative service Replacement services Request fail

650) this.width=650; "title=" clip_image002 "style=" border-top:0px;border-right:0px;background-image:none; border-bottom:0px;padding-top:0px;padding-left:0px;margin:0px;border-left:0px;padding-right:0px; "border=" 0 "alt = "clip_image002" src= "Http://s3.51cto.com/wyfs02/M00/84/57/wKiom1eNzEnCj0QxAABdCgY5914328.gif" height= "384"/>The difference between H323 and sipSIP P2p:trunkSIP C/S: End pointSIP dialing behavior does not support KPML. Every keystroke is sent once.The default

First, let's take a look at my sip. conf file, as shown below: [201] User= 201 Type = friend Secret = 1234 Host = dynamic Context = incoming [202] User= 202 Type = friend Secret = 1234 Host = dynamic Context = incoming [1234] User= 1234 Type = friend Secret = 1234 Host = dynamic Context = incoming [0] User = 0 Type = friend Secret = 1234 Host = dynamic Context = incoming [1] User = 1 Type = friend Secret = 1234 Host

In many cases, the SIP does not go directly to the target host, but goes through many intermediate node servers. In the request message, the Via header field indicates the nodes that have passed through (each node passes through, add a via header). In the response message, the via header field indicates the node that the message will go through next (each time the request is returned from the original path, a via header is deleted from each node ). T

Prack English translation (the provisional Response acknowledgement), you can call IT security information! This compares the image.The final response in the SIP is understood to be reliably transmitted, such as a 200OK response to the invite, and UAC will give an ACK telling UAS that it has received 200OK. The reliability between 200 and ACK is end-to-end. Prack is a mechanism for guaranteeing the reliable transmission of temporary messages (101-199)

In PPC development, you sometimes need to hide the sip. There are many ways to hide the SIP in Windows Mobile 5.0. The following are several methods: 1. shsippreference (m_hwnd, sip_down ); 2. sipinfo Si; Memset ( Si, sizeof (SI )); Shsipinfo (spi_getsipinfo, 0, Si, 0 ); Si. fdwflags = ~ Sipf_on; Shsipinfo (spi_setsipinfo, 0, Si, 0 ); 3. shfullscreen (hdlg, shfs_showtaskbar, shfs_hidesipbutton );

The concept of unified communication needs to be understood from the combination of multiple protocols. Among them, there is more participation in the SIP protocol. The integration of unified communication involves software, hardware, mobile devices, and fixed devices. The standards and protocols are different. Therefore, the integration is difficult. For IP phones and desktop applications, the main protocol is S