What does 'Abis' mean?

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qazmlp - 30 Dec 2004 02:25 GMT

The interface between BSC & MSC is called as 'Abis interface'.
I am just curious to know where exactly this term comes from, esp.
what 'bis' in 'Abis' means.

Thanks!

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Jer - 30 Dec 2004 15:22 GMT

> The interface between BSC & MSC is called as 'Abis interface'.
> I am just curious to know where exactly this term comes from, esp.
> what 'bis' in 'Abis' means.
>
> Thanks!

Abis This is a BSS internal interface linking the BSC and a BTS, and it
has not been standardised. The Abis interface allows control of the
radio equipment and radio frequency allocation in the BTS.

http://www.ee.surrey.ac.uk/Personal/L.Wood/constellations/tables/gsm.html

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jer
email reply - I am not a 'ten'

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John S. - 30 Dec 2004 22:04 GMT

>The interface between BSC & MSC is called as 'Abis interface'.
>I am just curious to know where exactly this term comes from, esp.
>what 'bis' in 'Abis' means.

This is a Nokia term and comes from Finland. I don't know the exact meaning.

As for the function the ABIS (all caps by the way) assignments are the
assignments of the various radios on the T-1 that connects the Base Station to
the BSC. It tells the equipment what is to be used for voice and what is to be
used for EDGE. It also assigns the OMSUG which is the control channel on the
T-1. Finally, it assigns the control spectrum for the control of each of the
voice channels.

--
John S.
e-mail responses to - john at kiana dot net

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John Henderson - 30 Dec 2004 23:37 GMT

> The interface between BSC & MSC is called as 'Abis interface'.
> I am just curious to know where exactly this term comes from,
> esp. what 'bis' in 'Abis' means.

I don't know if you'll find it helpful, but
http://tinyurl.com/6qcy4 defines it as: a "French term meaning
'the second A interface,' which is the link between a BSC and
the mobile switching center".

John

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Lawrence Wong - 01 Jan 2005 00:26 GMT

>> The interface between BSC & MSC is called as 'Abis interface'.
>> I am just curious to know where exactly this term comes from,
[quoted text clipped - 4 lines]
> 'the second A interface,' which is the link between a BSC and
> the mobile switching center".

This is my understanding also; the A interface uses 64kbs circuits and
follows the CCITT G.703 standard, but in the case of the remote transcoder a
64kbs circuit per voice channel would be wasted (as each speech channel is
only 13kbs). So rather than having the A-interface support 64kbs and 16kbs
"circuits", the Abis interface was created to support 16kbs (multiplexed)
circuits (so each 64kbs "physical" circuit carries 4 speech channels).

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