Monthly Archives: August 2014

Used Phone System Available

Voice Over IP phone system
We recently upgraded the phone system in our office, swapping out hardware and adding more lines. So now we’re looking to place our previous PBX in a good home.
This Voice-Over-IP system is fully functional and would be great for a small office setting. The PBX has a number of cool functions, including:

  • Built-in voicemail with optional email notification
  • Browser-based speed dial, including the ability to click any hypertext number and have the system dial it for you.
  • Browser-based call history log
  • Conference calling
  • Blacklist capability
  • Customizable automated attendant

As configured, this PBX system can support up to 4 inbound analog phone lines. It can then share those lines amongst many internal phone extensions. Right now we have up to 7 desk phones available (see photos) but more could be added fairly easily.
When it was brand new, this phone system originally cost over $1000 for the PBX components, plus $159 for each desk phone.
We’ll install the PBX in your office, and customize the automated attended script, for just $350. The phone sets cost $35 each. Depending on your computer network, we might be able to use existing network wiring. If more wiring is needed, we can discuss.
You might be asking, “So is this an introductory teaser deal, where we’ll have to sign a contract and make ongoing payments?” Nope. The system is a few years old, and definitely upgradable—if you want to do that sometime down the road, we can help. But we’re not looking to rope anybody into a commitment they’re not happy with.
This offer includes travel to/from your office within the Metro-Milwaukee area. (I’d need to charge for travel to locations farther out.)

We’re Moving!

Relocation Notification

 

Starting next week Monday (August 25), we’ll be supporting your custom software applications from a new office building.

We hope to make the transition as seamless as possible. But moving an IT-related company includes a number of challenges related to internet connectivity, hosted web sites and phone systems. When you factor in the physical relocation of furniture, computers, servers and office equipment, it can be a real challenge to make sure everything goes well. So please bear with us during this upcoming transition.

Here’s our new mailing address:

N116W15830 MAIN ST  STE 101
GERMANTOWN WI 53022-2603

All the rest of our contact info will remain the same …

www.iotechno.com

contactus@iotechno.com

262-437-3239 or 800-993-9028

But no matter where we are, please know that we’ll continue to work our level best to meet you where you are.

How to regain access to a Cisco PIX firewall after locking yourself out

Today I managed to lock myself out of our PIX firewall.  We’re moving to a new network, and I needed to update the internal IP addresses so that it’ll continue serving traffic to our web servers.

What got me in trouble:  I had tried changing the inside IP address without  enabling DHCP beforehand.   No matter which IP address I used, no matter how often I rebooted the PIX, I simply couldn’t get connected back in via telnet.

This took some serious effort which I don’t want to ever have to endure again, so I’m going to note the steps that ended up working for me…

1)      Find the blue serial null modem cable (I found it in the box labelled “misc cables” and will put it back there after I’m done)

2)      Set up a Linux box that has a serial port next to the router.  Connect the cable.

3)      On the linux box, type dmesg | grep tty and look for which port is being used for the serial port.  On this machine it was ttyS0, but might be something else.

  • If the only thing that appears is tty0 (which is the console), that might mean that the BIOS has the serial port turned off.   Sure enough, that was my situation.
  • If that’s the case, restart the machine and go into the BIOS, turning it back on.

4)      Assuming you found which port is the serial port, try running the following command:  cu –l /dev/ttyS0 –s 9600

  • I figured out after a long while, that you can’t do this as root—at least not by default.  So on my Ubuntu box, I had to exit the root shell and return to my non-privileged account in order to get cu to work properly.
  • If you get a message that cu isn’t installed, go ahead and install it using apt-get install or yum install, depending on which flavor of Linux you’re running.

5)      Once I got connected, the PIX prompted for what name it should be known by, which IP address would be the inside address, the current UTC date, and a couple of other basic things like that.  I happily provided them.

6)      After I saved the updates and disconnected, I still wasn’t able to telnet into the unit.  That left me scratching my head for quite a while—I could ping the unit, but it simply refused to let me connect via telnet.  I tried shutting down my local firewall, but to no avail.  Finally, after doing some additional digging, I realized I needed to reconnect via the serial connection and tell the PIX to allow telnet.  So I connected back in, went into enable mode, issued a conf t, and added this line:  telnet 192.168.1.0 255.255.255.0 inside   (Note that the last .0 on the IP address tells the PIX to allow telnetting from any address on the 192.168.1 network.)

After a full day of wrestling with this issue, I’m finally back online.  Hope this helps someone avoid the same pitfalls.