| What is a high speed T1 line? | | | | traffic patterns of their business, then this type |
| A high speed T1 line is a widely used standard in | | | | of line could also be a good solution. |
| telecommunications in countries such as North | | | | How do high speed T1s work? |
| America and Japan. It is utilized to send voice and | | | | In the past, the existing frequency division |
| data between equipments and devices. In places | | | | multiplexing carrier systems work well for |
| outside North America and Japan, E1 is used | | | | connections that operate between distant cities, |
| instead of T1. | | | | however it requires expensive modulators, |
| High speed T1 circuits are made up of | | | | demodulators as well as filters for each and every |
| twenty-four 8-bit channels where each channel | | | | voice channel. For connections within the metro, |
| consists of 64 Kbps. A high speed T1 line is also a | | | | Bell Labs in the late 50s tries to seek cheaper |
| full duplex circuit, which means that in theory, it | | | | terminal equipment. The Pulse code modulation |
| has the capacity of sending 1.544 Mbps and | | | | was once used to permit the sharing of coding |
| receiving 1.544 Mbps simultaneously. | | | | and decoding among a number of voice trunks. |
| In the beginning, high speed T1s actually meant | | | | Because of this method, T1 has chosen this kind |
| "Transmission - Level 1" and this had to with the | | | | of process in their system and introduced it for |
| media that is being passed over to the signal. DS1, | | | | local use in 1961. In the later decades, the price of |
| on the other hand, meant "Digital Service - Level | | | | digital electronics waned to the point where an |
| 1" and this means that the service is going to be | | | | individual codec for every voice channel has |
| sent originally on 24 digitized voice channels over | | | | become a common place, but during that time, |
| T1. The terms high speed T1 as well as DS1 have | | | | the other benefits and advantages of digital |
| become totally synonymous to each other and it | | | | transmission have already become dug in. |
| also includes the superfluity of a variety of | | | | The most common legacy that high speed T1 |
| different services from voice to data to | | | | lines have offered is its line rate speeds. T1 now |
| clear-channel pipes. The best thing about high | | | | means any data circuit that is running at the |
| speed T1s is that its line is always consistent at | | | | original speed rate of 1.544 Mbps. In the beginning, |
| 1.544 Mbps; however, the payload can differ in | | | | high speed T1s are formatted to handle 24 |
| huge amounts. | | | | pulse-code modulated and time-division multiplexed |
| Using a high speed T1 for faxing, internet and | | | | speech signals, where each is encoded in a 64 |
| telecommunications shows that you finally gotten | | | | Kbps stream, which leaves the 8 Kbps of framing |
| over and moved on from the local phone | | | | information to facilitate the synchronization and |
| company and finally going straight to the long | | | | demultiplexing at the receiver's end. Other types |
| distance carrier. This kind of moving on can help in | | | | of T-carriers are the T2 and T3 circuit channels |
| saving your business quite an amount of money | | | | that can handle multiple T1 channels that are being |
| over the course of one year. But still, it is | | | | multiplexed, which then results to transmission |
| inevitable that you have to shoulder the fee | | | | rate of 6.312 and 44.736 Mbps for the latter. |
| upfront, just like any other internet service | | | | It was supposed to be that the 1.544 Mbps rate |
| provider. Ah, now I see those raised eyebrows | | | | was chosen due to the tests that were being |
| coming, but don't you fret. High speed T1 can | | | | done by the AT&T Long Lines located in Chicago |
| guarantee you in making your company's | | | | which were conducted underground. To |
| workload easier and faster and as a result, the | | | | accommodate the loading of coils, cable vault |
| costs will just prove worthy as an investment. | | | | manholes were physically 2000 meter or 6,600 |
| Nowadays, a lot of companies oftentimes use the | | | | feet apart. In addition, the optimum bit rate was |
| entire high speed T1 for their main internet | | | | chosen in an empirical manner. This means that |
| connection by merely providing 1.544 Mbps of | | | | the capacity was increased until such time that |
| connectivity. This allows the 1.536 Mbps usable for | | | | the failure rate was unacceptable, then it is |
| the traffic while the 8 Kbps is used for framing | | | | reduced to leave a margin. |
| overhead. However, a high speed T1 can be | | | | Companding, on the other hand, allowed |
| ordered as a channelized circuit version and the | | | | acceptable audio performance with having only |
| best thing about it is that any number of channels | | | | seven bits for every PCM sample in this original |
| can be reserved for non-data use, for example, | | | | system of T1/D1. Later, the D3 and D4 channel |
| voice traffic. | | | | banks had extended their framing format, which |
| Types of High Speed T1 | | | | allows 8 bits for every sample, then reduced to 7 |
| Because of the growing business needs of certain | | | | for every sixth sample or frame the moment |
| companies, high speed t1 services have become | | | | when on bit was "robbed" for signaling the state |
| the most popular for Internet access among the | | | | of channel. The standard does not even allow an |
| small, medium as well as the big enterprises. Due | | | | all zero sample which can produce a long binary |
| to its fast and reliable uptime that it guarantees, | | | | string of zeroes and this could cause the |
| clients are very much secured with its services. | | | | repeaters to lose bit sync. However, when they |
| High speed T1 lines are thirty times faster than | | | | are carrying a data which is Switched 56, then |
| dial up internet connections because of its | | | | there can be long strings of zeroes. Thus, one bit |
| symmetrical line with 1.544 Mbps uploading as well | | | | per sample is going to be set "1" or jam bit 7. |
| as downloading facility. | | | | This means that 7 bits will be multiplied to 8,000 |
| You can actually find and choose high speed T1s | | | | frames per second for data. |
| that come in different forms, which depends on | | | | What's new with high speed T1? |
| the needs and demands of your company. | | | | Now, imagine what happens when you get a frizz |
| However, every high speed T1 internet service | | | | within your garden hose. So the data is the water |
| has its own price so you should consider particular | | | | while the pressure is the bandwidth demand. Any |
| things first before jumping into the conclusion of | | | | frizz can cause a flow to decrease into a drip. |
| choosing your high speed T1 service for your | | | | When this happens, the pressure or the demand |
| business. | | | | still remains. The data link is like this water pipe in |
| INTEGRATED T1 | | | | a way. Even when the frizzles are being removed |
| When talking about Integrated T1, then it refers | | | | by the diligent network engineers, the only way is |
| to a similar digital circuit. This just means that if an | | | | to move too much data inside the pipe and if you |
| establishment or an enterprise has plans of having | | | | want to remove or move the data in a quicker |
| 24 channels with the speed of up to 64 Kbps for | | | | way? You will need, of course, a fatter pipe. |
| every channel, then this high speed T1 can bring | | | | Fatter data pipes are slowly becoming necessary |
| astonishing results for your business. As a matter | | | | when electronic business data is increasing its |
| of fact, you can have the freedom in choosing | | | | quantity and resolution. One example of this kind |
| how much of these 24 channels you are going to | | | | of resolution are the medical imaging files where |
| use for voice calls, and what's left will be used for | | | | then cay easily become many Megabits and even |
| data purposes. Due to its flexibility in channels, | | | | Gigabits for every image. |
| then it can also be referred to as a Channelized | | | | Well, in a laymanized term for the |
| T1. | | | | telecommunication providers, serious bandwidth |
| FRACTIONAL T1 | | | | starts at the T1 level having 1. 544 Mbps on both |
| Fractional T1s are the type of lines that provide | | | | directions. A high speed T1 line can send files that |
| only a part of the total bandwidth. It is almost | | | | have a few megabytes in a matter of seconds. |
| similar with an Integrated T1 but the only | | | | Oftentimes, this can work out pretty well for |
| difference is that the subscribers can only utilize | | | | those text based contracts and specifications. |
| some fractions of the 24 channels. Although the | | | | From low to medium resolution photos, smaller |
| transmission methods and data transfer rates | | | | CAD files, general accounting ad inventory |
| remain the same but the customer only pay for | | | | updates as well as many real-time IP security |
| the number of channels that they are using. | | | | cameras. However, if you want to transmit more |
| Hence, saving quite an amount of money in the | | | | files at the same time, even larger files without |
| client's end. | | | | waiting for hours or even a longer period of time, |
| BONDED T1 | | | | you will really need a fatter pipe if you want the |
| This type of T1 line is the combination of the | | | | transfer to speed up. |
| functionality as well as the bandwidth of several | | | | You can only do the fattening of a T1 pipe by |
| T1s into a single connection. This type of | | | | merely bonding in more high speed T1 lines. When |
| connection can actually provide the downright | | | | you bond a second line, then you can double up |
| speed which is a main requirement for enabling | | | | your bandwidth from 1.544 to 3 Mbps. The |
| multiple tasks in a single point of time. To put it | | | | bonding can work up to 10 or 12 Mbps in many |
| simply, this single pipeline can offer a heightened | | | | locations before it can get more costly compared |
| and intensified bandwidth with outstanding | | | | to immediately moving up to a single fatter pipe. |
| performance. | | | | But, here's the good news! WAN bandwidth prices |
| BURSTABLE T1 | | | | have decreased greatly in the last few years and |
| Another type of high speed T1 line that can be | | | | the cost of having an upgrade so as to meet the |
| considered is what we call as the "pay as you go" | | | | transmission speeds that you gravely need as |
| type of service. It is a very convenient way to | | | | soon as possible will probably way lesser and |
| pay for the used as well as the increased | | | | cheaper that you think of. So don't hesitate and |
| bandwidth. The price could be very expensive | | | | try checking out how much you are going to |
| when you plan to use more than the provided | | | | invest in order to have fatter pipes. In the end, |
| plan since you have to pay a premium above the | | | | you will realize that it is worth all the hassle and |
| standard rates that you are using. However, if | | | | the investment. |
| your company is fully aware about the data | | | | |