Blocking Modems from calling out!

[98Converter]

We have 2 G3si Version 8.1.xxx and a Prologix Version 8.1.xxx and I was wondering if there is anyway to block the ability for modems to call off our PBX's. Our facilities site has @ 850 +/- lines, 70-75% analog. The problem is, we have contractors that come on site and unplug their phones(w/o us knowing) & dial out with their laptops, and sometimes while connected to our LAN... BIG security breach. I'm aware of Secure Logix and their Firewall product, but its very $$$$... Is there a feature on the Definity version 8 or later releases that can prevent modem tone, based on either a COR or COS...??? Thanks for any help~

 

[Armo2]

Hi,

Not sure this will work but have a look at data restriction on hte second page of the station form.

Hope this helps,

Chris

 

[vaoldschl]

Data restriction basically disables call waiting incoming to prevent a data call from being interrupted, it does some other stuff too, but it won't help in this situation. I think you're looking at all or nothing on the restriction.

 

[longneck]

If you need to be able to place outside calls on those lines that the contractors are hijacking, then there is nothing you can do programming wise.

However, if the phones don't move, you can cut off half of the little tab the holds the cord in the phone and in the wall jack (i.e. both ends of the cord). Just break off the narrow part and leave the fat part. 2 gotchas:

1) If you cut off more than you should it'll fall out of the phone or wall jack, or leave you with an un-reliable connection.
2) If the contractor is smart (or has long pointy nails), he can just use a screwdriver or pocket knife and move the tab that way.

Alsom I seem to remember a $12 device at sandman.com that screws up data and fax calls. You could install those on specific lines, then configure those lines to be the first set of lines dialed out on by the analog extensions.

Hmm...

- Kip

 

[KevinJones416]

Hello.. To block modems from placing outside calls you need to modify the COR. CHange the Calling Party Restriction to OUTWARD this prevents calls placed to the PSTN but allows calls to be placed within the switch. Refer to the security manual for more information or the ADmin manual regarding CORs'... This works with version 9 not sure with 8 though.

 

[98Converter]

So are you saying this is going to prevent modems specifically, from dialing out? If the person uses his/her 8110 analog phone for a phone call then unplugs and plugs in their laptop modem to dial out, the switch's COR will see that it is a modem and restrict? Is that what you're saying?

If so I'll investigate further into the manuals and program accordingly.

Thanks

 

[vaoldschl]

No, outward restriction is all or nothing not just if a modem is placed on. Best advice I've seen here is:

"However, if the phones don't move, you can cut off half of the little tab the holds the cord in the phone and in the wall jack (i.e. both ends of the cord). Just break off the narrow part and leave the fat part."

I used to do that with some decent success.

 

[europe]

What number(s) are these guys dailing with there modem, if it is a number for a POP to get acces to the internet just block that number in your Toll List.

Please let me know if the information that was provided is helpfull.
Edwin Plat
A.K.A. Europe

 

[pmny]

Change the cor to 0 and it will not allow outside calls to be made, only internal.

 

[98Converter]

Thanks all... So in conclusion, there is no way to detect that certain tone the modem is giving out and restrict it. They call all different POPs and ISPs so a specific number "block" doesn't help me... oh well. Thanks again.

 

[europe]

Well it is either getting all these numbers for these ISP's in the TOLL List or go to digital lines.

Please let me know if the information that was provided is helpfull.
Edwin Plat
A.K.A. Europe

 

[98Converter]

You got it~ Solution number 2 is the ideal way to go, and I'm lobbying for a digital environment as I type... thanks all again...

 

[garnerj]

I have a solution for you that would be perfect, upgrade the people that are calling out with a modem to Digital lines, the first time they plug in their modem, blam 48 v dc.

I dont have a clue what the Digital boards go for of the phone sets for that matter, but if you already have digital ports consider switching the users to them...