DISA setup

[Matt85]

does anyone know how to setup DISA on a SX200icp v3. I have an 800 number and when I go out of the state I would like to use it to dial in and use the system features, trunks, etc. Is it possible to set it up to access it through the auto attendant or do you have to dedicate a trunk for it. Also do I need to get a DISA card or can I do it with the embedded ASU trunks I am currently using? I tried reading the tech docs but they weren't too clear so if someone could help me out i would appreciate it.

Matthew McGowan
Reynolds Park

http://www.rpyc.info

 

[MitelInMyBlood]

Matthew you can do "DISA" with virtually any type of trunk on the SX200, you don't need anything special or any extra hardware.

Check the documentation under the heading "Trunk Operation - Direct Inward System Access (DISA) for particulars.

As a minimum you will need to designate the trunk(s) as a DISA trunk(s) and create a Verified Account Code for yourself.

I very strongly suggest that you never-ever put an 800 number on your DISA trunk as it will almost immediately attract hackers and they will continue to pound on your system, literally for as long as it takes to break-in.

This is not just a possibility, but a guaranteed promise that you will be hit with toll fraud if you put an 800 number on your DISA trunk, plus you will end up paying lots of money just for the hackers' many tens-of-thousands of attempts. Everytime they dial the 800 number and your PBX answers, you get dinged for that call.

If you're considering DISA as a means to getting away from needing an LD credit card, I would dismiss that thought from your head immediately. The enormous risk simply is not worth it.

 

[jsaxe]

And if that wasn't clear enough, I used to teach my students that DISA stands for:

Dumb
Insane
Stupid
Asinine

And yes, I've been there, got the t-shirt, and it hurt, real bad, and NYNEX didn't care.

jsaxe

"When the going gets weird, the weird turn pro."
Hunter S. Thompson (R.I.P. Doc)

 

[Matt85]

While I'm kinda in the dark here with no dealer so give me some slack. It wasn't that clear because I didn't understand the tech doc's but I finally figured it out through experimentation. I thought that you had to program a certain card in the truck circuit discriptors and then program that discriptor number on a trunk circuit. But all you had to do was go into form 15 and program a trunk circuit with the same exsisting programmed hardware that you use for the non dial in trunks. If someone just told me that I would have known how easy it was. I won't put the 800 number on it but how do you suppose people find out about our 800 number if it was in fact forwarded to the DISA line?

Matthew McGowan
Reynolds Park

http://www.rpyc.info

 

[MitelInMyBlood]

They scan for them nightly, every night.
If you haven't seen the movie "War Games" go rent & watch.

They turn a computerized "war-dialer" loose looking for any 800 number that returns dial tone or modem tone or answers with anything potentially useful.

Once they discover a DISA port, then the attack is directed just at that number, trying to crack your account code.

 

[mojo2006]

How about if you don't enable dial tone on that DISA trunk?

 

[Matt85]

is that possible?

Matthew McGowan
Reynolds Park

http://www.rpyc.info

 

[MitelInMyBlood]

Not really, but you CAN set up a directory nbr on a physical instrument that you allow to call-forward to your DISA port after several (many) rings. That will slow them down a little, but then it becomes a royal P.I.T.A. to the rightful user.

If you're determined to do this, why not put a Speech server on instead of DISA (i.e., Speak@Ease)? That is FAR more secure.

If by now you feel like we're trying to talk you out of this DISA idea, you're very perceptive because we are. Take it from those several of us who have been down this road before and graduated from the school of hard knocks. If you need a long distance credit card, for goodness sake go get one. Nothing else is as safe.