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Electronic Components/Leased Lines (T1,T2,T3,T4).


QUESTION: Dear Deirdre

T1 (1.544 Mbps)
T2 = 4 T1 lines (6 Mbps)
T3 = 28 T1 lines (45 Mbps)
T4 = 168 T1 lines (275 Mbps)

Are there any Internet Service Provider companies offering T4 Leased Lines connectivity  Services i.e. 275 Mbps Bandwidth Speed for Business Corporates ?

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

ANSWER: T1 - T4 aren't offered as such much anymore. If you need T4 service, you'll likely use fiber or cable or whatever is available, and use a load-sharing multi-WAN router to build the equivalent. This is much easier than concatenating 168 individual lines.

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QUESTION: Dear Deirdre

Thank you.

1. Do you feel the need for High Speed Telecommunications Leased Lines are possible in the near future ?. i.e. Building those High Speed Telecommunications infrastructure by Internet Service Provider companies ?

i.e. T5  = 200 T1 lines (308 Mbps)
    T6  = 230 T1 lines (355 Mbps)
    T7, T8 ..... and so on ...

2. The above networks can be very useful especially for Geographically dispersed Business corporate (Offices in different regions viz North America, South America, Africa, Asia, Europe) for internet speed access.
data upload/download, browsing/surfing, email etc.

Isn't it ?  

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

Again, high speed communications are important, but the concept of leased lines for Internet is fairly out-dated. Some companies do lease lines for special purposes - e.g. radio stations leasing lines for a studio to transmitter link.
But leased lines, such as T1 - T5 are purchased only by companies who cannot afford their own infrastructure. And today, it is mostly the telecommunications companies who are providing Internet infrastructure.

A T1 line can cost about $1,000 per month to rent. (I have seen prices as low as $300) When this is compared to an equivalent fiber connection which can be had for less than $100 per month for equivalent service, already connected to the Internet, the cost of a leased T1 line makes sense only for companies who wish to keep their data private. Remember that a T1 line, or a T5 line does not constitute a connection to the Internet - it is merely a leased data line between two points. Connecting to the Internet is separate from the cost of the leased-line service.

Also, it's important to note that the data rates are different between Europe and North America.

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Deirdre Hebert


I can answer most questions regarding electronic components, what they are and how to use them.


I worked for a number of years in the electronic component testing industry, designing and building automated test equipment for the electronic manufacturing industry.

Numerous technical manuals for the equipment we built.

UNH, CCAF and others

Past/Present Clients
General Electric, Motorola, Ford, Sensonor and others.

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