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# How many TCH are there in an E-1

Viewing 8 posts - 1 through 8 (of 8 total)
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Usman
Guest

hi all,
i need to know how many traffic channels does one e-1 carry., i.e on the basis of total traffic channels/trunks how do u calculate the number of required E-1 links.
thanx
usman.

Mostafa
Guest

Hi Usman,

In GSM, we sum the total traffic capacity of all the cells
( bellonging for example to the BSC u’re supposed to calculate E1’s for) wich gives you X erlangs.

You have to shoose your blocking factor( for example 0.02), and with your X, you go to the Erlang table wich gives you the result.

Bainie
Guest

hi all,
i need to know how many traffic channels does one e-1 carry., i.e on the basis of total traffic channels/trunks how do u calculate the number of required E-1 links.
thanx
usman.

Mostafa
Guest

Normally, 1 E1 carry 32 channels, but,2 are moved out for synchronization & sygnalling==>30channels.

Regards.

Stubgar
Guest

Mostafa is correct. 30 voice channels from
32 timeslots x 64kbps (8kHz x 8bits) = 2.048MHz, with TS16 used for CAS (on/off hook condition signalling etc) and TS0 for sync.

AlexSh
Guest

yes, it’s obvious that you have 30 voice channels from 30 voice channels from 32 timeslots x 64kbps. if u consider gsm network u have 30 speech channels on one E1 on A-interface, and more then 3 times more speech channels on A-ter and A-bis interfaces.

Tushar
Guest

How is signalling information carried by TS-16 in an E1 stream?
What is the mechanism/logic?

Hi All,
Guest

It depends multiplexing also. concentration, unconcentration, multiplexing 16/32 !

-jp

Viewing 8 posts - 1 through 8 (of 8 total)
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