Ok. Let me try one more step. Agree there is some confusion - T1 has been around along time and is used in a variety applications (with many name modifications). Imagine 24 telphone lines each with a 64k modem and bonded into one data channel 1.536 mbps. Or just think of a trunk with 24 distributed telephone lines. Both exampls are applications of T1. Or you could have a T1 with 8 phone lines and the other 1/2 (768kbps) used as a data channel. This only a fraction of the versitility of T1.
We manage two T1's - one as a connection to an ISP (through a firewall) and another one point to point at home. Actually, I prefer the term "nailed down" (also called "private line")T1, "however point to point" is more common usage. Nailed down is a cleaner term when talking with someone who knows what it means and it is pretty much considered "locked down" and secure. The advantage of T1, aside from security, is it has been around a long time and there is a lot of used equipment at great prices (Ebay). We connected via AT&T Paradyne DSU and a Ciscopro router (with Lan port) for something like 25% of what the Telcom charges. We also did our own programing and wiring (needs a crossover cable), after the Telcom installed a Hyperedge box. My advantage is to have two sons pretty sophisticated in networks and telephone systems. Bottom line - T1 has been around a long time and is probably the most stable of all phone connections. It can be secure, it can be connected to public networks - not secure. Equipment is affordable. It can be "full" T1 or it can be fractional (price dependant). The tarrif is typically based on how far (miles) the line travels. All these iterations may pass through multiple swithces. It is up to the telcom to assure security. Certainly it is more secure than a phone conversation. Sorry if trying for brevity confounded things. Welcome any comments or corrections of this post. Thanks, thurman > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:hardhats- > [EMAIL PROTECTED] On Behalf Of Cable One > Sent: Saturday, May 14, 2005 1:06 PM > To: [email protected] > Subject: [Hardhats-members] RE: T1s and security > > I won't harp on this again... I promise. There seems to be a lot of > confusion about this and it can have bad consequences if the wrong > assumptions are made. > > Thurman, you're right a T1 is a hardwired (maybe) connection between two > locations. The network topology that you describe is secure because of the > topology not because it is a T1. The T1 is just a time domain digitally > multiplexed carrier of 24 64kb/sec DSOs. These DSOs can be agregated for a > full 1.54 Mb connection or can be sub-agregated (fractional). They can > carry > voice and/or data. > > Let me describe a T1 that is NOT secure. It is the one in my office. I > have > a T1 connection, the other end of which in located in the offices of a ISP > that belongs to some friends. The have an OC3 (45Mb/sec) connection that I > get to put my mail server on. This T1 is private in the sense that it > carries only what I put on it, but it is NOT secure because it IS part of > the public packet switched network we call the Internet. > > I would not assume that because you have a T1 that it is secure and that > firewalls are note required. Not to plug my own profession too much, but > it > is a good idea to have a network engineer look at your WAN design before > you > run medical data on it. > Thurman's T1, as he describes it, is secure because they are bringing the > internet into the network through another channel, and his T1 is already > behind a firewall. > > Best regards, > > Donald R. Donigan > donigan technology, LLC dba > Desert CODE Works > [EMAIL PROTECTED] > [EMAIL PROTECTED] > > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.11.10 - Release Date: 5/13/2005 > > > > ------------------------------------------------------- > This SF.Net email is sponsored by Oracle Space Sweepstakes > Want to be the first software developer in space? > Enter now for the Oracle Space Sweepstakes! > http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click > _______________________________________________ > Hardhats-members mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/hardhats-members ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click _______________________________________________ Hardhats-members mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/hardhats-members
