Connecting to a SIP provider

SIP-telephony: services of SIP-providers in the field of IP-telephony

What is SIP-telephony?
SIP is the standard for making Internet calls, which is used in conjunction with other IP telephony protocols. SIP providers provide users with the ability to establish voice and video calls.

The SIP network is an Internet telephony network and does not depend on traditional telephone networks: connections are made via Internet channels. That’s why IP-telephony is profitable and accessible to any Internet user. Cheap rates for international and long distance calls are the main advantage of SIP-telephony.

How to choose a SIP-telephony provider?
There are no significant differences between SIP-providers: someone cheaper to call then someone else. You can always compare providers’ tariffs in several directions and choose the prices that suit you.

For the call center, high quality of voice transmission and reliable transmission of faxes are important. Therefore, when choosing a SIP-provider, it is recommended to pay special attention to the quality of communication.

Most operators allow you to make test free calls. You can download the software softphone and compare the quality of voice transmission to choose the right SIP provider.

A good benefit is obtained by using several providers that offer attractive rates for certain directions that are of interest to the user. Recently, large SIP-providers began to provide an opportunity for users to make and receive calls from other SIP-networks of IP-telephony operators, select tariffs for different operators, route connections, etc.

How to use the services of a SIP provider?
SIP-telephony can be connected to various equipment that supports SIP and H.323 protocols – PBX, IP PBX, SIP adapters, VoIP gateways, IP telephones, soft phones. Typically, a contact center server is connected to the SIP network.

As a rule, SIP-telephony providers provide support for codecs G.711, G.729, G.723.1, iLBC, gsm. Receiving and sending faxes is via T.38 protocol and in G.711 mode passthrough. Many operators try to provide the convenience of the administrator interface for self-management of service settings.

To make a call, simply dial the subscriber’s phone number (with all the codes of the mobile or city telephone network). If the subscriber is connected to a SIP provider, you can also call his SIP ID number. The call through the SIP-provider practically does not differ from the call in the city telephone network.