Session Initiation Protocol (SIP) is a control (signaling) Protocol for the application layer of Network calls and conferences. It is mainly a multimedia communication protocol based on an IP network. All the signaling functions it can implement also use RTP as the media transmission protocol. It was initially proposed by the IETF mmusic (multiparty multimedia session control) Working Group.
The main functions of
Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/
1. Definition of VoIP: voice services with certain service quality transmitted over an IP network.
2. Key VoIP technologies:
Speech Processing Technology
Minimize the bit rate (voice encoding technology, voice detection and suppression technology) while ensuring a certain speech quality)
Ensure certain call quality in the IP environment (packet loss compensation, Echo offset, and dejitter)
Voice Communication Protocol
Call Control Protoc
When talking about the Unified Communication field, we are sure we know the contest between Cisco and Microsoft. From their own development perspective, Cisco = hardware, Microsoft = software. So two completely different methods bring different solution concepts to enterprises. What are their characteristics?
Cisco and Microsoft have adopted completely different methods in the field of Unified Communication: Cisco's approach is based on network and hardware, while Microsoft's approach is "softwa
IP addresses.Other:DNS (domain Name Service), which is used to complete address lookups, mail forwarding, and so on (running on TCP and UDP protocols).Echo (Echo Protocol, wrap-around protocol) for error detection and measurement response time (running on TCP and UDP protocols).SNMP (Simple network Management Protocol), which is used for network information collection and network management.ARP, Address Resolution Protocol, addresses resolution protocol for dynamic resolution of Ethernet hardwa
platforms.
SIP Communicator: this is an open-source VoIP client software using Java technology. It supports IPv4 and IPv6 speech and video communication.
Hardware devices of the software phone
Hardware equipment is not perfect, which is a major disadvantage of software phones. Although some people like to use headphones and computer speakers to talk about the phone, some people feel uncomfortable and want
and broadband SoftSwitch. Narrowband Softswitch is mainly used for narrowband voice services, and broadband Softswitch is mainly used for broadband multimedia services. In fixed networks, narrowband Softswitch technology means that a soft switch uses H.248 or MGCP protocol to control various gateways, including the relay Gateway TGTrunk Gateway) and Access Gateway AGAccess Gateway) and integrated Access Device IADintegrate Access Device), they are responsible for user Access and communication w
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There are three categories of frequently asked questions as can be seen below. Please select the appropriate link below:GeneralParticipant Technical Technical -I believe there are almost endless ways to implement the Jain specifications is this true? -In Jain, is there an asynchronous message mechanic, or is there just a synchronous API invitation? -It seems that there is some, if not a lot of overlap between Jain, JMX, Jdmk,
A typical proxy server inserts a P-called-party-id header domain when routing INVITE requests to a destination. The header field is filled in with the request-uri of the PORXY received request. UAS identifies from several registered aors which AOR the session invitation is sent to.Users of the 3GPP IMS can obtain one or more SIP URIs (AOR) that identify the user. For example: A user can obtain a business SIP
Http://www.mihua.net/node/279m.htm
Linphone and X-Lite are the most famous ones.Soft Phone soft phones (Open Source)
Source code can be downloaded and modified
Name
Description
Actxphone
An ActiveX-control SIP softphone Based on the Microsoft Real Time Communications (RTC) API. Written by http://www.pernau.at/kd/voip/ActXPhone/. VB
Ekiga
SIP, H.323 audio and video softpho
We have previously introduced the overall structure of Cisco's Unified Communication call system. Now let's take a look at the core features of SIP implementation and other supported functions. We hope that the introduction and analysis in this article will help you understand this part of knowledge.
Cisco deploys SIP based on RFC to implement core telephone features. To provide many SCCP-based features, Ci
Introduction
The software Input Panel (SIP) is a basic function of every mobile platform equipped with the wince system. It provides a means for users to input data on PDA. When talking about sip, we generally think of two points: one is the SIP itself, and the other is how to use sip in the program.
Unified Communication Platform, known as the Office communication Server (OCS), is integrated with Active Directory, Exchange Server, and other Microsoft products.
Both IBM and Microsoft have developed smart phone clients that support Mobile users: Microsoft's Office Communicator Mobile and IBM's Lotus Sametime. Because IBM and Microsoft provide a unified communication platform, their solutions must be integrated with the infrastructure. They all rel
Introduction
The software Input Panel (SIP) is a basic function of every mobile platform equipped with the wince system. It provides a means for users to input data on PDA. When talking about sip, we generally think of two points: one is the SIP itself, and the other is how to use sip in the program.
Let's take a look.
002. PNG(27.1 KB)
In fact, a registration information is added to the PC registry of the OC client.More than just expand this web tag, you can expand up to 32 according to your needs. In the figure, I expanded twoEn simple OC extension application,The domain administrator can use the policy to add the information to the internal PC.,See http://bbs.winos.cn/thread-36124-1-1.htmlAdd this information to an external user registration script.For example:[HKEY_LOCAL_MACHINE \ SOFT
=" Notepad.exe ") {M. Terminate (1 );}}} Uint PID; process. Create (" Notepad.exe ", Null , Null , Out PID); var my = process. getinstances ( This . Scope ," Processid = "+ PID. tostring ()); If (My. Count> 0) {var I = My. getenumerator (); I. movenext (); process P = I. CurrentAs Process; p. Terminate (1) ;}// comparison of another form:
Managementobject mo = New Managementclass ( This . Scope, New Managementpath (" Msft_sipesusercontactdata "), New Objectgetoptions (). createinstance (); Mo [
supports slice to C + +, JAVA, C #, Python, Ruby, PHP language mapping.Slice Example:Module Family//For C + + namespaces{interface child;SequenceInterface Parent//classes corresponding to C + +{Children GetChildren (); Ok};Interface Child{parent* Getmother ();parent* Getfather ();};};Using slice to define interface/class methods is similar to other programming languages, requiring a return value and several parameters, but it is important to note that slice does not support reference-mode param
are their advantages and disadvantages?
The most common Proxy Server only connects two UA instances. The b2bua Server is an intelligent entity and more powerful. It has some functions that proxy cannot do. It is more flexible and gradually replaces the general proxy server and becomes the mainstream of the SIP server.
According to the description of the sip-router.org,The biggest difference between the pr
A long time ago, I took a rough look at Osip, exosip, ortp and quickly "encapsulate" a Windows-based vc6-based mfc sip Soft Phone (all source code vc6 project files and Lib libraries can be found in this blog shared folder ), due to time constraints, I can only analyze the code of Osip, exosip, and other development libraries in a pure "application" manner. As a matter of interest, I can refer to the working principles of the
1. add new Lync Users to the synchronization cycle between the Lync database and the AD, and change the phone properties of Lync Users to the Lync database at a time when performing operations on AD. We can see the synchronization time period www.2cto.com through the following command. we can see from the result that...
1. add new Lync Users to the synchronization cycle between the Lync database and the AD, and change the phone properties of Lync Users to the Lync database at a time when perform
Working Group and other domains may not be able to synchronize the address book normally;
In lync, the Default Authentication Mode of the ABS virtual directory is integrated identity authentication, but the address book can be successfully synchronized in the Working Group and clients of other domains by default. No problems are found.
3.LyncDatabase and ADSynchronization cycle
Adding new lync users, changing the phone properties of lync users, and other operations on ad requires time s
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