ATA & modem problems

[JosephBernard]

We have a MICS R1T1 system using an ATA (NT8B90AC-93) but when using it with a modem it won't connect. Making phone calls and sending faxes are fine. Well, actually, it will work with a modem if I add 3 pauses at the end of the dialing like 9,555-1212,,, but that makes it connect at 2400bps which is total unuseable.

The way our system is setup is that we have 2 hanger type buildings that are the size of about a Lowes Hardware store. The system is in building A and from there we have a fiber extender to building B which is about 1/4 mile away. The ATA is mounted by the connection in the front of building B and the phone is in the end of the same building. I have tried using the modem on a line closer to the front of building B and could get a 24,000bps connection if I added 2 pauses and tried about 10 times. Could it be the distance that causing this?

What happens is the modem will make the cycling sound to wait for a response, but it doesn't seem to hear the response although I can hear it on the phone. It will keep making the cycle causing the line I'm calling to disconnect after failing and it won't hang up unless I tell it. This happens with all computers and modems I've tired.

We're looking into upgrading to MICS 6.1 soon, so I was wonder if an ATA2 would help this issue or not as well.

 

[Arr]

The ATA2 is rated for 28.8K.

PhM


VVV

 

[JosephBernard]

Is there like a way to adjust an ATA?

 

[bkrike]

With ATA2 you can adjust for settings of it being either a phone or a fax/modem. I can’t remember if ATA1 has this, or if it would even help your problem. Obviously, you could just run straight analog dialtone to the locations if it were mission critical.

 

[JosephBernard]

Yeah, I was hoping someone had experienced the same thing and there was some easy fix. It looks like we'll just have to run the line straight there. That is going to be one long cable.

 

[bkrike]

I don’t know what your experience with cabling is, but you may just be able to use the existing cable. The first option would be to put it on the same pair as the ATA if you are not going to use it any longer. The second would be to keep the ATA in place, and just put the analog dial-tone on another pair of the same cable. Most cabling used in telecom is multi-pair (usually 3-4 pairs for station runs.) The ATA uses one pair, and the dial-tone would use another. There would be no problem for both the ATA and an analog dial-tone to share the same cat3 cable, on different pairs.

 

[JosephBernard]

In our case, the cable to the phone from the other side of the building isn't the problem. It's the cabling that has to be run from building A to building B.