Kuldeep singh Wed, 07/03/2013 - 07:55
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Hi,


This link is not sufficient to understand....anybody can explain in brief.



KS

vmiller Wed, 07/03/2013 - 10:22
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the bandwidth measure is how much data in a given moment of time can be carried over a circuit.

In your case the maximum is 155mbps.


The speed will be a function of the sum of propagation delays, serialization, tcp window...and on and on.


http://broadband-nation.blogspot.com/2007/06/speed-vs-bandwidththe-age-old-question.html


thats one discussion, there are many more.

Kuldeep singh Wed, 07/03/2013 - 21:25
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But maximum limit of STM1 is only 126 mbps then how can STM1 carry 155 mbps data over it.......

Joseph W. Doherty Thu, 07/04/2013 - 04:44
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STM1's bandwidth is about 155 Mbps.  STM1 has about 6 Mbps of overhead leaving about 149 Mbps for payload.


When you mux E1s into STM1, you introduce additional bandwidth overhead.


Also an E1 is rated at 2.048 Mbps, and there's a +/- allowance so the bandwidth consumption can be a little higher than your calculated 126 Mbps.


You can search the Internet for STM1 E1 muxes (for additional information).

Kuldeep singh Thu, 07/04/2013 - 09:52
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Hi Joseph,


Actually my client is asking this question many times and they want exact answer then what i will tell them  ?

126  or  155  Mbps ?



KS

Joseph W. Doherty Thu, 07/04/2013 - 12:36
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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.


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155

Kuldeep singh Sat, 07/06/2013 - 08:17
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Can i connect 77 Branch office from head office where STM1 link terminated ? and

Each branch offices require 2 mbps pipe. As you stated that STM1 support 155 mbps

that means i can distribute or use  77 *2 = 154 mbps for all offices ?


Plz correct me if i am wrong.........

Kuldeep singh Sun, 07/07/2013 - 18:37
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STM1 pipe uses which Medium :  Fibre or Copper or both ?


Can anybody explain STM1 with best explanation in terms of mbps ? 126 or 155 

Kuldeep singh Sat, 07/20/2013 - 03:02
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Can anybody explain STM1 with best explanation in terms of mbps ? 126 or 155 

marwahasachin Mon, 07/22/2013 - 05:38
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Dear Kuldip,


  In STM there are 63 channels , each of 2mbps , so max bandwidth we can use is 63*2mb=126 Mb(129.024 Mb). So you can connect only 63 offices, each having 2 mb link or E1 line.Actual bandwidth of STM1 is 155mbps difference is utilised for signaling purpose.

Kuldeep singh Tue, 07/23/2013 - 07:35
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You mean to say that 155-126 = 29 mbps will be used for signalling, Payload, overhead and etc.

i think it is wastage of 29 mbps. we can use even less mbps for such purpose.


who is responsible for configuring 29 mbps,  ISP end or  Branch offices Router end. ?

vmiller Tue, 07/23/2013 - 08:11
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that 29mbps is spread over all seperate channels. There is nothing to "configure" in this regard it is a standard.

The overhead is built in as part of the Synchronous Digital Hierarchy.

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