[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?

[Nir Simionovich]

Well,

  None of us is nitpicking here, are we? ;-)

Nir S 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Andrew
Kohlsmith
Sent: Tuesday, June 14, 2005 2:56 PM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?

On Monday 13 June 2005 21:14, Nir Simionovich wrote:
> do a little math (23+1)*64 = 1536kbps = 1.536Mbps, hence the speed for 
> a single T1 circuit.

Your math's a little off.

T1 = 24 8-bit channels + 1 frame bit sent 8000 times a second.

24*8 = 192+1 = 193 bits sent 8000 times a second = 1544000bps.

Now you don't get to play with the frame bit:
24*8 = 192 * 8000 = 1536000bps, which is the payload data rate of a T1.

I won't get into the RBS signaling and framing but you get the idea.  

-A.
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