Usage and common problems of SIP softphone registered with SIP account

Software phone （ Also known as SIP Software client ） be based on IP technology , Allow end users to use computers and various VoIP Telephone calls sent and received by codec . This application runs on a computer , You can call and pass VoIP The service provider connects to the phone number . You can call others' phones or software phones . A virtual dial is usually displayed , The function is similar to the traditional VoIP Telephone . They are the purest VoIP technology , Take advantage of computer resources . For business travelers , Students and “ Internet connection ” Users have created unparalleled convenience . Soon, the computer of an office worker will have the function of telephone .

The software can be downloaded from the Internet , Make your computer have telephone function . It can be a small storage disk , Or other formats that computers can access . In both cases , Your computer needs to be equipped with software programs to use Internet phones . You will need an Internet connection , Broadband is the best , Such as DSL, Wired or wireless and VoIP Service provider account .

Software phone function support
This is a
counterpath Xlite Interface of software phone . Click the corresponding function , You can do what most traditional phones can do .

There are many other different phone software available for free , Such as different users GUI Interface , It can be connected with a variety of codecs , You can also set other functions according to your preferences . We list some other available softphones , You can find... Here ：

zoiper
X-Lite
Connection problem
Log in to VoIP Many problems may occur in the service provider network , Including authentication and connection . “ login timeout ” or “ Unable to login to the server ”, It is a connection error message caused by connecting or entering the wrong user name and password . The following three items are common and important problems ：

Internet Connect – Make sure you can display web pages .
Sign in Softphone Use the correct user name and password for your account .
Disable any firewalls on the computer .
There may be several reasons for the connection problem , A firewall 、 Security network , Or double NAT problem . If you connect in a new location for the first time , VoIP can run successfully in other places , You need to know some network problems . Many Internet phones have firewalls, which can be found and intelligently configured , But even so, it can be solved without contacting the local network administrator .

Call problems
If you have successfully logged in to your VoIP Service provider , With dial tone , But I can't make or receive calls , You can check the following items ：

Is the number you are calling valid ？ Try another number , Make sure your dial plan is normal ( If it is necessary to add 0 Or the area code ).
Whether the volume and speaker you set are working properly ？ By opening the audio wizard and following the steps to reset the audio .
Have you enabled the correct codec ？
If you can receive the dial tone when dialing out , But you can't hear each other's voice , Or unable to answer the phone , Please check your audio settings , Note the following ：
Check DND Please do not disturb whether it is enabled accidentally .
Firewall or dual NAT problem .
If DND not enabled , Try opening another program at the top of the softphone , Such as Internet Explore. Then make a software call from another phone . Whether the software phone has risen to the forefront ？ If so , Check whether there is an audio problem when the telephone signal is on . If audio and DND Not a problem , So double NAT Maybe that's the problem .
Audio problems
There are several factors that can cause audio problems , Affect the quality of voice transmission . network connections , Bandwidth and latency are VoIP Important factors for good connection .

The use of software phone headphones and microphones will limit audio feedback . Other factors include ：

The voice suddenly becomes louder during the call . This can be a sign of over modulation . Ask the other party to reduce the volume of his microphone .
A lot of background noise . In most cases, you can adjust the volume by using the audio wizard provided by your supplier .
Echoes . This problem can usually be reduced by using headphones and adjusting the volume
Poor sound quality or hoarseness . This is usually caused by network connection delay or packet loss , But it may also be due to the poor network .
The audio frequency varies from time to time , intermittent . Insufficient bandwidth will lead to such an effect , It is more obvious when three-way teleconference or files on the same network are uploaded . Increase your ISP service （ bandwidth ） Horizontal or more compression codecs can solve this problem .
Related reading ：​