What Is A PRI Line, What Are The Advantages And Limitations Of PRI Circuits?

In an ISDN system, there are two types of services: Basic Rate Interface (BRI) and Primary Rate Interface (PRI). While the first one is installed at home or small business organizations, the later one is for large organizations which have their own telephone exchange systems. There are number of B-channels and D-channels in the system which carries data, video, voice with several control and signaling information. But, what is Primary Rate Interface and how does it work?

What is PRI Line?

The Primary Rate Interface comprises of a 64 Kbps D-channels and 23 Kbps B-channels. Here, it uses T-1 line. It also consists of one D-channel and 30 Kbps B-channel, which use an E1 line. If a user accesses the Primary Rate Interface on a T-1 line, he can get internet speed up to 1.544 Mbps. On the other hand, an E1 line user can get services up to Mbps. PRI utilizes Q.931 protocol over D-channel.

There are some countries where this system is carried on a T-carrier system line while E-carrier line is available worldwide. The users of the system are directly connected with the telephone company's central office.

Advantages of PRI Circuits

1. The service provider gives almost 500 numbers for each line. Therefore, it becomes easier for the outsiders to call the extension straight without going through the PBX Auto-attendant.

2. Through a PRI line, it is possible to have voice and data access. There are also some service providers which offer free data transmission for certain period of time.

3. Call hunting is also easy with a Primary Rate system. But for the analog trunks, the service provider needs to extend the facility and also include additional cost.

4. What are the other benefits of this system? It can be utilized for voice connectivity, video conferencing, data connectivity, faxing, etc. And all these can be done simultaneously.

5. This circuit is anytime better than the analog trunks as it is an end-to-end digital system.

6. Due to the fiber optic materials, the wire is far more redundant than analog trunks. Also, you will face less troubleshooting here than other systems.

7. Tapping your digital phone lines and listening to your conversation is almost impossible now.

8. You don't have to wait long to start a call here.

9. As there are several service providers who comes with flexible plans, this system also become economical for small companies.

Limitations of PRI Circuits

1. If the minimum rental is less than the average value of calls in an analog system, then installing PRI circuit is not that much economical.

2. If you have to make international calls, this system is not cost-effective. You can choose SIP or ITSP services at lesser rate to make such calls.

3. You have to pay for Inter branch communication if you install this line. If you install VOIP systems, you can make inter branch communication over internet at much lower cost.

4. You can buy Primary Rate lines only if you buy those from your EPABX vendor.

By Nick A Patel

To take advantage of FREE real time quotes and support for voice and/or data networks...comparing 200+ providers...simply ask at the following link.  It's as easy as 1, 2, 3.

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How To Find The Best Commercial Telephone System For Your Business

Commercial telephone systems could be a game changer for your small business. With a little investment on this front, you can actually give your business the much-needed boost. Here are some of the factors that you should keep in mind when selecting or choosing these commercial telephone systems.

One of the first aspects to keep in mind would be the overall credibility of the company. You want specialists who have been in the business for a while and thus can give you equipment that is at par with the latest market trends. You would also notice that they offer free advice and quotes to new clients for helping them get an approximate cost also. This is an industry that is flooded with new players but many of them are actually just looking for selling products rather than value.

Beyond this, costs are another crucial factor that come into account. For example, a particular firm may promise you exceptional benefits but in the long run charge you more with high fees, hidden charges, etc. implicating more of losses. You want solutions that are viable and affordable but not really so high on the cost front that you keep losing monetarily.

Also, do check out the term contracts when you are opting for the same. Most commercial telephone companies give you the flexibility to replace and repair devices in case they are under warranty. Complicated though these systems may seem, there is no denying that they can be susceptible to some problems. These state of the art devices are completely automated in nature. Though they simplify your work process they are also prone to once-in-a-while glitches. These should be ideally covered under your commercial telephone systems company.

Watch out for companies that emphasize on sales pressure. It means that they are trying hard to sell. Look for companies that offer solutions without being commission-based and provide complete training for these installations. Doing so would help you in smoother transition and shifting from your regular telephonic devices to these contemporary units. Other aspects to consider here include.

• What is the type of brands being offered to you? Are they renowned international brands or something that is made locally but yet promising?
• Apart from this you should also ensure that it connects well with both infrastructure and networking needs from your side. It can be that you need the connections for both internet and intranet purposes. So do check if the following company is providing for both. 

With these voice and data solutions you get benefits like telephonic cabling that includes the latest CAT 5 and 6 structured data and network cabling. So no matter what the size of your business be, if you are planning on extending your network and make business transactions and processing smooth, a high-end commercial telephone system would definitely be a boon in simplifying this process and also giving you a multi-faceted solution for taking care of all of these needs.

Southern Voice and Data offers your business office or commercial telephone systems with broadband and data service so that it transforms online interests around the UK businesses, public services, and many more. They will provide you with a comprehensive solution for your telephony needs including telephone systems, data network cabling, etc.

By Phil Harwood 

To take advantage of FREE real time quotes and support for voice and/or data networks...comparing 200+ providers...simply ask at the following link.  It's as easy as 1, 2, 3.

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