outstanding!!
"michael champion" [EMAIL PROTECTED] 09/28/00 02:45PM
A T1 frame is 193 bits. 192 bits (24X8) corresponds to data, and 1 bit is
used for synchronization. There are 8000 frames per second. T1 was
originally defined for PCM-encoded voice (8 bits per channel, but 1 bit for
'; [EMAIL PROTECTED]
Subject: RE: PRI vs T1
On Thu, 28 Sep 2000, Winchester, Derek S. wrote:
Actually they are both one and the same. The coding in the way the T1 is
setup at the CO makes it viable to be used as a T1. Both provides 1.544mbs
bandwidth. The test is wrong unless it gears towards voice
Well... In North America a PRI is a T-1, but a T-1 is not necessarily a
PRI. The T-1 will provide 1.536 Mbps in usable bandwidth, assuming it
is using B8ZS linecoding... The PRI will offer 1.472 if it is
configured as 23B+D (and the underlying T-1 is B8ZS)... Hope this helps
some.
-Ben
Actually they are both one and the same. The coding in the way the T1 is
setup at the CO makes it viable to be used as a T1. Both provides 1.544mbs
bandwidth. The test is wrong unless it gears towards voice technology.
Derek S. Winchester
Sr. WAN Engineer(CCNP)
Data Communications
[EMAIL
OK. I understand. Where is the additional 8k at? Is it the communication
channel for a T-1?
""NetEng"" [EMAIL PROTECTED] wrote in message
8qvlk4$vtv$[EMAIL PROTECTED]">news:8qvlk4$vtv$[EMAIL PROTECTED]...
Is there a difference between a PRI and a T-1? What has 23B + 1D? What one
has 24B? The
John: A T1 is rated at 1.554mbs. A PRI is physically a T1 different
configuration makes it a PRI. Let me have your source that tells you
otherwise and I will say you are misrepresenting the information.
Derek S. Winchester
Sr. WAN Engineer(CCNP)
Data Communications
[EMAIL PROTECTED]
Phone:
PRI has 23B+1D. T1 (also called a "channalized" T1) has 24 B-channels.
Therefore, you have a 64k bandwidth difference. The book is correct because
only T1 has 1.544MB (usable) bandwidth.
Both use a T1 circuit. The difference can be important if you're using the
circuit for dial-up modem
Message-
From: Clay Stuckey [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 28, 2000 11:57 AM
To: Winchester, Derek S.
Subject: Re: PRI vs T1
with my experience, a pri denotes primare rate interface referring to frame
relay and is not specific to a particular pipe size. A T1 is a 1.5 Mb
A T1 frame is 193 bits. 192 bits (24X8) corresponds to data, and 1 bit is
used for synchronization. There are 8000 frames per second. T1 was
originally defined for PCM-encoded voice (8 bits per channel, but 1 bit for
signaling when needed - "robbed-bit signaling"), with 24 voice channels per
.
It happens :)
Richard A. Holland
Voice/Data Integrator
Telec, Inc.
http://www.telecinc.com
CCDA,CCNP,MCSE
-Original Message-
From: Edward Watson [EMAIL PROTECTED]
To: NetEng [EMAIL PROTECTED]
Cc: Cisco List [EMAIL PROTECTED]
Date: Thursday, September 28, 2000 12:20 PM
Subject: RE: PRI vs
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