×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Using a dial up modem via an ATA

Using a dial up modem via an ATA

Using a dial up modem via an ATA

(OP)
I am trying to use a dial-up modem via an ATA on an NBX 100. Is this even possible? The modem won't negotiate a call successfully with the other end, but does when plugged directly into an external line. The ATA presents a dial tone properly, the modem can initiate a call, and the other end answers, but it sounds like the modems can't establish a connection properly.

I'm guessing that either the ATA isnt designed to allow modem calls (although dont some people use fax machines this way?) or there are some settings I can adjust to make it successful.

Any help appreciated.

RE: Using a dial up modem via an ATA

If you can, try to turn down the speed on your modem to 14.4 kbps.  I have ran into issues in the past with newer fax machines that advertise "super fast speeds".  Ithink I have narrowed it down to devices using a v.94 protocol.  We had a customer where we ran into an issue like this...turning the speed down to 14.4 on the modem did help although it creeped.  Good luck getting help from 3com on this.  Thier support has just tanked since they were recently bought out.

RE: Using a dial up modem via an ATA

cknipe has it right, ATA devices on the NBX platform cannot perform faster than 14.4kbps, it's a known issue, who knows if there will ever be a fix.

RE: Using a dial up modem via an ATA

Modems are not supported on an ATA as stated in the documentation, so it is unlikely that you would get support.  Only fax machines and analog telephones are supported.  So, why should 3Com be held responsible for supporting a configuration that is, e-hem, not supported?

A classic case of this is the client who orders PRI service, but later realizes that they need to use a credit card machine.  In this situation they would need to order a separate analog line.  Another case is some alarm systems, which might have only partial functionality in talking to the monitoring station.

Sometimes you get do lucky.  As others have said that if you can lower the communications rate, it _might_ work.  I wouldn't plan on it though.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login


Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close