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Subject: RE: T1 Vs ISDN PR [7:37983]
PRI gives you 23 channels of 64K each.. Which is equivalent to a T1 -
1.5Mb
For a VPDN, users could dial into a PRI
HTH
Suj
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Brian Zeitz
Sent: Wednesday, March 13, 2002 12
T-1 is the layer 1 standard. ISDN PRI uses T-1 for layer 1 connectivity.
Therefore, whenever you say ISDN PRI, you are referring to T-1. However,
not all T-1's are ISDN PRI.
The other T-1 is referred to as CAS, channel associated signaling and, as
far as I know, is only used for voice. It
.
Normally when people refer to just T1, they mean T1 CAS.
Tarek
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Brian Zeitz
Sent: Tuesday, March 12, 2002 1:22 PM
To: [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
OK, I am just confused, is a T1
I'm afraid that isn't so. You can order channelized and non-channelized
T-1s to do whatever you want with. So there is a big difference between an
ISDN PRI (and all of the associate ISDN stuff - D channel, etc) and a
run-of-the-mill T-1 (and its total lack thereof). Placing a CSU/DSU on the
This is not quite right. Yes, ISDN PRI is physically a channelized T-1.
In this case you have 23 data bearing channels and one signalling
channel.
For data, you can order a channelized T-1 if you need to. This gives
you 24 channels available for data, but they are entirely separate
channels.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of
Brian Zeitz
Sent: Tuesday, March 12, 2002 1:22 PM
To: [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
OK, I am just confused, is a T1, and a T1 PRI are the terms used
interchangeably? What
If you plan on terminating only analog calls then channelized T1 is
fine and generally cheaper. Want ISDN, get a PRI.
Dave
Brian Zeitz wrote:
Is there any drawbacks to getting a T1 PRI vs. a regular T1 (I think
that's called channelized). I am not sure of the drawbacks of using PRI,
John,
You make a good point that channelized T-1s are all but unheard of.
However, the term clear channel doesn't mean unchannelized. It means that
the DS0s are the full 64 kbps, as opposed to the older bit-robbed 56 kbps DS0.
Scott
John Neiberger wrote:
This is not quite right. Yes,
; [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
PRI gives you 23 channels of 64K each.. Which is equivalent to a T1 -
1.5Mb
For a VPDN, users could dial into a PRI
HTH
Suj
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Brian Zeitz
Sent: Wednesday
Nope! T1 CAS can be used for either data or voice. The same for ISDN (PRI)
T1.
Tarek
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 12, 2002 1:43 PM
To: [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
T-1 is the layer 1 standard
: T1 Vs ISDN PR [7:37983]
T-1 is the layer 1 standard. ISDN PRI uses T-1 for layer 1
connectivity.
Therefore, whenever you say ISDN PRI, you are referring to T-1.
However,
not all T-1's are ISDN PRI.
The other T-1 is referred to as CAS, channel associated signaling and,
as
far as I know, is only
else? Initially its just my site and the ISP. Thanks for your
post, these are really helpful.
-Original Message-
From: John Neiberger [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 12, 2002 3:07 PM
To: [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
This is not quite right. Yes
You would have to get a different CSU for your router.
Daniel Ladrach
CCNA, CCNP
WorldCom
-Original Message-
From: Brian Zeitz [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 12, 2002 3:29 PM
To: [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
OK this answered my question
To: [EMAIL PROTECTED]
Subject: RE: T1 Vs ISDN PR [7:37983]
OK this answered my question. If my only choice is a T1 PRI, then I
don't have to worry about things not working. Like my router and
firewall, I was just thinking it was something out of the ordinary. I
need just a regular T1 for internet
Brian,
In order to avoid getting caught up in the terminology (and risk that
someone at your telco is using it improperly), I would state emphatically
that you plan to terminate the service with a non-ISDN, relgular ol' CSU.
Make certain that they know that and you should be fine.
Scott
Brian
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