Re: (ASCEND) Max-4000 E1/T1

To: Jason Nealis <nealis@babylon.erols.com>
Subject: Re: (ASCEND) Max-4000 E1/T1
From: Neale Banks <neale@idesign.com.au>
Date: Fri, 17 Apr 1998 23:00:07 +1000 (EST)
Cc: John <john@venus.centrin.net.id>, Ascend Users <ascend-users@bungi.com>
In-Reply-To: <Pine.LNX.3.95.980416182643.7567A-100000@babylon.erols.com>
Sender: owner-ascend-users@max.bungi.com

On Thu, 16 Apr 1998, Jason Nealis wrote:

> 
>  Ahhhh, Ok, I thought they were the same. Besides signaling what is 
> the difference from E1 to T1? is there a command channel like the D
> channel for signaling? 

They are different at the physical level (sorry, I don't know the
details).

Beyond that, (as you know) T1 provides 24x64k channels whereas E1 provides
31x64kchannels.  With E1, it is customary to do signalling in channel 16 -
signalling can be either an ISDN D-channel, SS#7, or (as someone else
pointed out) R2 (no doubt there are others too). 

One thing that's rarely (if ever) done with E1 is robbed-bit signalling
(along with T1, NI-n, 56k etc it is a North American peculiarity). 

A common aspect is the nature of D-channel signalling.  This is defined at
higher levels and is independent of T1 -vs- E1 type issues.

HTH,
Neale.

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Re: (ASCEND) Max-4000 E1/T1

From: Jason Nealis <nealis@babylon.erols.com>

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