Setup Instructions
for IP Telephony Programs

Step-by-step guides for setting up popular SIP clients, softphones, and programs for making calls over the internet.

Office desk phone with keypad and display, surrounded by blue icons for support, security, users, and analytics.
Illustration of a VoIP setup with a laptop showing a call interface, a headset, and a smartphone for communication.

Instruction Catalog for SIP Clients

Select your operating system and follow the step-by-step instructions to connect your Stream Telecom SIP account.

Windows

Go

MacOS

Go

iOS

Go

Android

Go

Linux

Go

Windows Phone

Go

Instruction Catalog for Software and Equipment

Select your software or equipment manufacturer and follow the instructions to connect your Stream Telecom SIP account.

Asterisk

Go

Audiocodes

Go

Cisco

Go

Escene

Go

Fanvil

Go

Gigaset

Go

Grandstream

Go

Htek

Go

Yealink

Go

What These Instructions Are For

We have collected guides that will help you quickly launch IP telephony without calling a specialist — from registering the program to making your first call.

How to Connect a Program to a SIP Account
Where to Get the Login, Password, and Server Address
How to Check Registration on the Server
How to Make and Receive Calls
What to Do If the Program Does Not Connect

What You Need for Setup

Prepare all the data in advance — setup will take 3–5 minutes.

SIP Login

The identifier of your account in the system.

SIP Password

The secret key for authorization on the server.

SIP Server

The address of the Stream Telecom registration server.

Internet

A stable connection from 256 Kbps per line.

Headset

A microphone and headphones for high-quality communication.

Common Setup Errors

Solutions to common problems when working with SIP programs.

The Program Does Not Register

Check the login, password, and SIP server address. Make sure the account is active.

No Incoming Calls

Check routing in your personal account and the forwarding settings.

No Outgoing Calls

The balance may not be topped up, or the call destination code may be blocked.

The Other Party Cannot Be Heard

A problem with NAT or RTP ports.

Blocked by the Router

Open SIP port 5060 (UDP) and the RTP range 10000–20000 in the firewall.

NAT Error

Enable the NAT/STUN option in the SIP client or use a VPN

Can’t Set Up the Program?

Stream Telecom specialists will help you connect your SIP account, configure the calling program, and check that telephony is working correctly.

Frequently Asked Questions

A SIP client is a program or application for making calls over the internet using IP telephony technology. With it, you can receive and make calls from a computer, smartphone, tablet, or IP phone without using a traditional telephone line.

A SIP client connects to the telecom operator’s server using a SIP login, password, and server address. After setup, the user can make calls through a landline, mobile, or multi-channel number connected to the IP telephony service.

To set up a SIP client, you usually need the following data:

SIP login — the username or account number;
SIP password — the password for connecting to the server;
SIP server — the address of the IP telephony operator’s server;
connection port — most often 5060 or another port specified by the operator;
protocol — UDP, TCP, or TLS, depending on the service settings.

Sometimes additional STUN server, codec, NAT, or outbound proxy settings may be required. If you connect Stream Telecom IP telephony, the required setup data is provided after the service is activated.

The SIP login and SIP password are issued by the IP telephony operator after the service is connected. This data can usually be obtained in your personal account, from your manager, or from technical support.

If you are already connected to Stream Telecom but do not know your SIP details, contact support or your manager. It is not recommended to share your SIP login and password with third parties, as they can be used to make calls from your account.

Yes, IP telephony can be set up on a smartphone. To do this, install a SIP application for Android or iOS, such as Zoiper, Linphone, Grandstream Wave, or another compatible app.

After installing the program, enter the SIP login, password, and SIP server address. After successful registration, the smartphone will work as a full-fledged work phone: it can receive incoming calls, make outgoing calls, and use the company number from anywhere with internet access.

If the SIP program does not register on the server, the reason is most often related to incorrect settings or internet connection problems. Check that the SIP login, password, server address, and connection port are correct.

Registration may also fail due to blocking by the router, firewall, antivirus, or internet provider. In some cases, changing the connection protocol, configuring NAT, enabling a STUN server, or restarting the application helps. If the problem persists, it is best to contact Stream Telecom technical support to check the account and connection parameters.

If there is no sound during a call, first check the microphone, speakers, or headset on the device. Make sure the SIP application is allowed to access the microphone and that the correct audio device is selected in the program settings.

If the equipment is working properly, the cause may be NAT, the router, firewall, or codec settings. Enabling a STUN server, changing the network, restarting the router, or changing the SIP application settings often helps. When using IP telephony, it is important that the internet connection is stable and does not block voice traffic.

Technically, one SIP account can sometimes be configured on multiple devices, but this is not always recommended. When one account is registered on several SIP clients at the same time, problems may occur with incoming calls, registration, sound, or incorrect call routing.

For stable operation, it is better to use a separate SIP account for each employee or device. This makes it possible to correctly receive calls, keep statistics, record conversations, and manage the company’s internal telephony.

Yes, Stream Telecom helps customers set up SIP programs and IP telephony. Specialists can advise what data to enter, how to configure the SIP client correctly, what to do if there is a registration error, and how to solve sound problems.

Support can help configure programs on a computer, smartphone, IP phone, or another compatible device. This is especially convenient for businesses that need to quickly launch corporate telephony and ensure stable call operation.