[Asterisk-Users] Beyond T1

[Steve Underwood]

Even with the robbed bit thing you get 62666.7 bits/s, since it only 
steals the LSB every 6 samples. :-)

Regards,
Steve

Marcelo Pacheco wrote:

>A T1 is 24 64000bps channels.
>The 56000bps thing is when robbed bit signalling is used, it steals bits from 
>each voice channel for call signalling, while on the E1 one channel is used 
>for that. When PRI signalling is used each voice channel is the full 64000 
>bps thing.
>
>Marcelo Pacheco
>
>Em Qui 16 Set 2004 13:17, Andrew Thompson escreveu:
>  
>
>>Christopher Jacob wrote:
>>    
>>
>>>All,
>>>
>>>This may be a stupid question, but here it is...
>>>
>>>What interface gives the most density? Do I top out at T1's? For
>>>instance, 4 t1's to the Digium Quad span t1 card. Is there an interface
>>>available for T3 or DS3?
>>>      
>>>
>>Depending on where you using the circuits, you might try an E1. It uses
>>the same total bandwidth as a T1(I think), but splits the channels at
>>56K instead of 64K, yielding more channels. (And now I can't remember
>>the number.)
>>
>>I haven't heard of direct DS3 connectivity...
>>
>>Just stretching my imagination a little bit, you might be able to plug a
>>  DS3 into a H323 box, and then feed the IP-side of the calls to
>>asterisk....
>>    
>>