VOIP Link Question

KuhnElectronics · Post by **KuhnElectronics** » Fri Jan 27, 2006 9:55 pm

I have a dispatch center in Gallipolis, Ohio that needs to be linked to a base station in Columbus, Ohio. Currently it is controlled via phone line.

What options are availible as far as making this a VOIP controlled base?

The base station is on top of a hospital that has offered us an ethernet connection and any type of port fowarding or allocated bandwidth we require.

I have seen a few units, but they are controlled through a desktop or laptop computer. I would really like the dispatch side of the VOIP link to interface into an unused channel module on my centracom II, although I do realize this would require a tone adapter.

This base is barely ever used, just maybe infrequently when a southern squad makes a transport to columbus.

TIA...

Nick

n1pfc · Post by **n1pfc** » Sat Jan 28, 2006 4:29 am

Look at the Telex IP-223

You can set them up in 'console' mode to accept keying tones from a centracom or whatever console you have pre-existing.

You can then point it to the remote end and run that in 2 or 4 wire tone remote or local control mode.

Kurt

nmfire10 · Post by **nmfire10** » Sat Jan 28, 2006 1:43 pm

What kind of network connection is at your dispatch center? If this is mission-critical or public safety, a consumer DSL or Cable internet isn't going to cut it.

KuhnElectronics · Post by **KuhnElectronics** » Sat Jan 28, 2006 3:21 pm

i will ask our IT guy exactly what speed we are at, but we have a commercial wireless service at our center. This remote controlled base will only be used once in a blue moon. If we do a transport to Columbus (which is very rare) we would just like the option of 2 way contact other than cell phone.

Right now we are paying for a business phone line with long distance, so if we get free internet from the hospital and utilize the internet at our center, it should pay for itself to get rid of the phone line.

I will look into the telex, I like the tone contol features.

Thanks!

n1pfc · Post by **n1pfc** » Sat Jan 28, 2006 7:20 pm

KuhnElectronics wrote:i will ask our IT guy exactly what speed we are at, but we have a commercial wireless service at our center. This remote controlled base will only be used once in a blue moon. If we do a transport to Columbus (which is very rare) we would just like the option of 2 way contact other than cell phone.

Right now we are paying for a business phone line with long distance, so if we get free internet from the hospital and utilize the internet at our center, it should pay for itself to get rid of the phone line.

I will look into the telex, I like the tone contol features.

Thanks!

Telex is going to tell you that you have to set them up with a VPN inbetween them. To have full functionality (link checking and such), you do. BUT if all you want to do is just pass VoIP audio, you need a static IP on both ends and point each IP-223 at each other. This way you are using unicast versus their default of multicast. If Telex tells you it can't be done, PM me and I'll walk you through setting it up using unicast. I've done it before as a test.

Kurt

ve3nsv · Post by **ve3nsv** » Fri Jun 02, 2006 3:38 am

What is the furthest you have used the IP-223's for linking stations together. The company I work for installed 3 IP-223's with 6 radios into a local Utilities company with a C-Soft dispatch console but it was all over the LAN. We are just now testing radio to radio linking over the WAN and wondered if your limited to the number of hops (time to live) when connecting over the internet?