Things to know about CLI Route and Non-CLI VoIP Route

VoIP Route

VoIP Route

VoIP Route in VoIP Technology is not only important for service providers but also affects the end-users as well. While similar to the regular telecommunication routes, VoIP routes are exclusive to the VoIP communication.

VoIP Technology presents a combination of traditional telephone system and the internet protocol. The outcome, therefore, is cost-efficient, internet calling. And this technology gradually led to the formation of the vast VoIP Industry of today.

The audio signals convert to data packets for transmission in VoIP technology. These packets can travel over the Internet over VoIP routes, which essentially lets the VoIP call bypass the traditional telephone routes.


VoIP Service Providers

Traditional telephone service providers charge heavily for international or long-distance calls. And therefore to meet the demand of such varied destinations, VoIP Service Providers offer VoIP Route for A-Z Destinations.

The wide range of destinations helps businesses to get more customers. And for the end-users, they can compare and select service providers according to the call rates that suit them.

To know more about how to sell VoIP Routes check here: 5 Easy Steps to Sell VoIP A-Z Route


Routes in VoIP Communication System

Why do we need VoIP Route? It is because VoIP Routes are an integral part of the VoIP Telecommunication process and thereafter the VoIP industry as well. They are through which the VoIP calls pass and connect the caller and the receiver.

Therefore, the quality of the Routes also matters a lot. Good quality routes result in a good quality call, and eventually customer satisfaction. Whereas on the other hand, poor quality routes often result in complaints regarding the call quality.

VoIP Technology depends heavily on internet connection. And often if there is any instability in the internet connection, it affects the VoIP Call. But the whole VoIP communication system comprises of many parts and any issues in one of them can affect the call quality.

While there are certain things that an end-user can manage, VoIP Routes are the responsibility of the service provider entirely. The cost of the service depends on the quality of the route. And some users prioritise price over quality according to their necessity.

To know more about Wholesale VoIP Check here:  Wholesale VoIP Termination details to Help You Get Started


Types of VoIP Routes

CLI Route:

In CLI Route the recipient will receive the call after it goes through a chain of carriers. In this type of VoIP Route, the Caller ID is visible. This VoIP Route is commonly called the White Route.

Non-CLI Route:

The Caller ID is not visible at the call destination in this type of Non-CLI or Grey Route. A GSM gateway can terminate this type of calls.

Direct Routes:

When the Route Provider has a piece of terminating equipment, it forms a direct route as there are no intermediaries. The call passes directly from the device to the provider before reaching its final destination.


TDM stands for Time Division Multiplexing. In this the termination of the VoIP Route with time-division multiplexing takes place. This is similar to a traditional phone service set up over a phone line.


PRI stands for Primary Rate Interface. Integrated Services Digital Network uses PRI for carrying multiple DSO voice and data transmissions between network and user. This type of route is a bit uncommon.



CLI stands for Calling Line Identification. This is a type of telephone service that is available in both digital and analog telephone services. In addition to this, it is also hugely popular in VoIP services.

Another related term for CLI in use is Calling Line Identity. This method helps to identify the caller for all inbound calls to any business or individual. In this process, the telephone number of the caller or the name of the caller or organisation associated with the call is displayed.

The feature of Caller Identification was initially developed for the PSTN system. Later the usefulness of the feature prompted others to include it in their businesses.

The reason that the CLI is popular among businesses is because of its data-gathering aspect. The businesses use the caller’s data from the inbound calls to collect data and also to improve their response to further calls.


3 Users of Caller Identification

Mobile Providers

The feature of CLI is important for mobile providers for providing the voicemail option. The providers use caller ID to automatically connect to voice mail number.

As the voice mail number was related to the associated number, it did not require any further password. But due to frequent reports and cases of spoofing, this practice has been replaced with more secure ones.

Internet Service Providers

The use of Caller Identification prevents abuse of the account by unauthorised callers. This is the main reason for the Internet Service Providers who provide dial-up access service require the consumer to use identification feature.

To further strengthen security, many systems with dial-up access are customisable. They are programmed only to accept calls with specific caller ID strings.


Telemarketers often provide free toll-free numbers to consumers to call back rather than connect the call directly to the point of origin.

In many cases, the telemarketers spoof caller ID to remain untraceable. However, this practice is against the law. And therefore, the telemarketers using toll-free numbers also use caller ID.


CLI Routes

Among VoIP Routes, CLI Routes are one of the best ones. These white routes display the caller ID when the call connects to the recipient. The Caller ID visible to the receiver is actual information and not some random generic number.

The white routes are “legal”. By legal, it refers to the route termination on any end. All the connections associated with this route termination is in accordance with the law and also well connected to the telecom infrastructure of the concerned country.

These legal routes containing the caller information are also of the best quality among all the other routes. The audio quality these routes offer is of international standard. And in addition to this, they are reliable in terms of connectivity and any other technical aspects.

However, the cost of CLI Routes is usually higher than other routes. And the reason behind its high price is primarily the quality. Although several other factors may also affect its final price tag.


NON-CLI Routes

The NON- CLI Routes are also known as grey routes. The calls terminated through non-CLI routes do not display any information about the caller. It usually displays a blocked call or some random number.

Many countries have restrictions on grey-routes. Due to the limited information available on the caller, the questions arise on its legality and its termination or any possible violations.

Usually, these routes have impromptu set-ups. In addition to that, they further use GSM or cellular service gateways for traffic handling and call termination over the destination telephone network.

On the aspect of call quality, the non-CLI routes also result in decent quality calls. Although usually, the quality of cli routes are better. But, as previously mentioned, there are many factors which affect the VoIP Call quality apart from the type of route.


The legality of VoIP Routes

The legality of CLI and NON-CLI VoIP Route needs explanation. Although the lines are blurry, it’s still worth an effort.

In simple terms, the CLI Routes carrying and displaying the caller information are legal. While the NON-CLI routes which do not reveal the caller information are termed as illegal.


An example with the routes emerging from country X to other countries is offered.

Traditional cellular or government monitored telecom services exercise monopoly in the telecom sector. And therefore the price of such traffic is very high. Therefore many individuals, businesses, organisations use VoIP Routers to counter this high-cost issue.

These people send the legal or the white route traffic of country X to the VoIP Routers via Internet (IP). The local PSTN terminates these at rates much lower than the international call termination charges.

Therefore, on one end the routes are illegal or “black”, that is in other countries. But on the other end, they are “white”, which is in country X. And as a result, the route with one end black, one end white is then called a grey route.


Route Service Provider

Wholesale VoIP Termination business focusses solely on the transaction Wholesale A-Z VoIP Route. It is necessary to route the VoIP Traffic for the purpose of VoIP termination. And here comes the part of buying, selling and even exchanging routes of different countries.

To begin a Wholesale VoIP Business it is advisable to get in touch with a reputed VoIP Service provider offering wholesale Services. Rather than starting from scratch, these service providers can help to establish the business at a nominal cost. Opting for service providers will also have the additional benefit of round the clock support and dedicated assistance.

To know more about Route Service Provider check here: How to become a VoIP Wholesale Routes Service Provider

You may also read