[Asterisk-Users] (UN)structured E1

[Alex G Robertson]

Peter,

I asked this question in other list (asterisk-br). Both answers make it is clear 
now.

If I got the matter, unstructured framing is used for Data (2M full) and 
structured for "64k circuits".

Thank you.

Alex Robertson


Peter Svensson wrote:
> On Tue, 11 Jan 2005, Alex G Robertson wrote:
> 
> 
>>http://ckp.made-it.com/g704.html says:
>>"G.704 is the framing specification for G.703. A carrier can 'steal' a 64kbps 
>>time slot (TS0) from a 2.048 Mbps line and use this to provide timing. The 
>>result is that 31 time slots are left for data, which equals in a bandwidth of 
>>1.984 Mbps.
>>
>>Normally G.703 lines with G.704 framing is called Structured G.703. Carriers 
>>offer G.704 when their network is built up on a cross-connect basis, and will 
>>offer unstructured G.703 when their infrastructure is based upon multiplexers."
>>
>>But, what about Asterisk and Digium TDM interface TE405/TE410 ?
>>Does it support Structured and Unstructured framing?
> 
> 
> If you ask your telco to set up an ISDN PRI they should have most of the 
> information they need. 
> 
> A PRI is carried over a structured T1/E1. I don't think the Digium cards 
> can be operated as a raw (unstructured, non-channelized) T1/E1.
> 
> Peter
> 
> 
> 
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-- 
Alex G Robertson
NOC - Microlink