An addendum: When we say 24 lines that does not represent 24 discreet copper lines. It's all in the programming.....tx/t
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:hardhats- > [EMAIL PROTECTED] On Behalf Of Thurman Pedigo > Sent: Saturday, May 14, 2005 4:01 PM > To: [email protected] > Subject: RE: [Hardhats-members] RE: T1s and security > > 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 ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? 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