Mini Carrier Remote Over Wireless Links

[zcgillihan]

Hello,

At our college we have a Nortel PBX at the main campus; we expanded our campus and have several buildings. There is a building across a state highway and we cannot run fiber to attach another cabinet. We setup a remote carrier for the phones and used a Cisco wireless bridge to get across the highway. From the main pbx it goes to a RAD IPmux 2xT1 to Ethernet converter to the wireless bridges on the main building then on the other side we have the same thing. We used all digital cards on the remote side to try and avoid an Echo that has been reported. I am having problems because there is still an echo and we are getting dropped calls. The wireless link has a full 32Mbps and the T1 is 1.5Mbps. We know the link is not going up or down. If we adjust the gitter buffer higher we get more echoes and more stable but if we lower the gitter buffer we get less echo and less stable. We cannot find a medium. Does anyone have any suggestions or can anyone tell us that this setup has been installed and works?

THANKS!

 

[tnphoneman]

My experience is that this equipment will not provide a carrier grade T1 service. Thus you have teh problems you are running into. Cisco is notorious for saying something works and come to find out hundreds of thousands of dollars and months later it had never worked in that particular scenario.

Have the LEC provide a point to point T1.

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Artificial Intelligence Is No Match for Natural Stupidity.

The latest survey shows that 3 out of 4 people make up 75% of the population.

The original point and click interface was a Smith & Wesson.

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[zcgillihan]

Tnphoneman,

Thanks for your reply. Have you ever heard of anyone being able to do the wireless link and it work? I have not. Is there any items we might change out to see if they work better? Also LEC? You mean a phone provider like AT&T provide us a T1 to the buildings?

Thanks again!

 

[dabble]

This post is rather timely for me. I am just in the process of doing this myself.

We have an Opt 81C and a mini carrier remote remotely that has a wireless data connection and a point to point T1 connection for their voice.

Our wireless vendor is currently working on installing hardware wireless that will replace our point to point T1.

When we first connected it, it didn't work. They went to the source to find out why and actually will be arriving shortly to run the test again.

They are using a Dragon Wave product. Here is the link to it.

http://www.dragonwave.ca/main.asp?id=products&page=register&type=whitepapers&itemid=11&contact=1

I'll update this post later today to let you know how we made out.

 

[phonz1]

In these cases if Nortel doesn't support the application, you're going to be on your own also, but still I'd be interested to know your outcome!!

 

[curtismo]

Get a wireless product that is built for carrier grade T-1. There are several manufacturers out there, including Adtran's Tracer product line. You may also look at a free-space optics solution, such as a Canobeam. Most of these can take a T1, or mulitple T1s, plus Ethernet.

 

[tnphoneman]

Yep...LEC = Local Exchange Carrier.

Never heard of anyone getting this done but that is not to say no one has done it. Take a look at the error counters on the LMI and RMI cards and see if you are getting any on the spans.

We had an instance where the cusomer wanted to use micowave to get phones across the runway to the other side of the airport. We were on the roof looking at the building they wanted this to terminate in and just then a plane crossed our line of site. Needless to say they decided to go with something else instead.


Signature===========================================
Artificial Intelligence Is No Match for Natural Stupidity.

The latest survey shows that 3 out of 4 people make up 75% of the population.

The original point and click interface was a Smith & Wesson.

Red meat is not bad for you, it is the green fuzzy meat that is bad.