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You don't mention if you have a VPN between sites already. Depending on bandwidth available to you between sites, TDMoIP could be of interest. I have not used it, don't know if it is cost effective for you, but it would not require any changes or upgrades to your switches. http://www.tdmoip.com/...

I don't suggest you replace T1's with vonage sevice. I would suggest you evaluate the cost of gateway, facility membership, liabilities and administration for interface with the carriers at carrier neutral facility. whether you will actually be using VOIP will depend on the route, same as now...

go to cisco's site and do a search for QOS with your router and IOS version. If you don't want to mess with it you can hire a remote tech to configure it for you online. Gerald

Vonage and others give you unlimited calling for fixed price and supply a gateway device that could connect to the PBX analog trunks. Unless you have a gazillion minutes of use it is not of value to buy a gateway and buy wholesale minutes. Most of the big guys will be offering a version of...

There could be another issue: AC noise induction through the phone lines or faulty wired electrical circuit. AC HUM: If the filters on board are not big enough you could be getting this problem. AC hum needs to be filtered to ground. SNIX devices remove this. I have a few if you want to test...

Good planning and network design are obvious requirements. if you need to understand some generic considerations for a few of the codecs used look at http://www.robotics.net/clec/tools/index.html and download the voip efficiency tool, it will give you some ideas to work with. I have worked with...

If you want the full scoop on NPA-NXX's out there check out the North America number plan website: http://www.nanpa.com/ another useful site for international dialing codes and time zone info, check out: http://www.timeanddate.com/worldclock/dialing.html Gerald

Quad is NOT 2 pair cable. Quad is 4 wires only, not 2 individually twisted pairs that then twist around each other. Gerald

As an international company you should consider implementing a global VOIP strategy and depending on your mobile plans ( some allow free mobile to mobile calling) implement a VOIP direct to Mobile solution. Terminate 30 calls direct to mobile for about USD$40K if my memory is correct. Your ROI...

BTW, Quad wire sucks and whoever allows this to be sold in this day and age should be strung up. It's time has long past, please let it die! Someone else will come along after you and have to replace it if you don't! Gerald

Regarding AC noise/induction: I have had induction issues several years ago with certain types of Nortel analog phones used in a cabled office where all drops were cat5e fully terminated on 8 pin 568B jacks and run back to patch panel for cross-connection to the PBX. The problem was not the...

check out Altigen, I have been working with it since 1997. great administration and troubleshooting tools for non-technicians. has both IP and analog capability. Gerald

Check out Altigen, great product, easy admin. Gerald

What do you want it to do?, What equipment must it integrate with? Hands off turnkey or do you wish to build it?

Be aware, I am biased. I have been involved in sales and support of Altigen product since 1997. Technically reliable, excellent feature list from day one, fast and easy to implement and simple admin interface and troubleshooting trace functionality that an admin needs. Altigen can work with...