Solved

NO CARRIER

Posted on 2003-12-02
6
344 Views
Last Modified: 2013-12-27
I'm building a VB app that communicates with a noise station though a modem line. So far i've been able to establish a connection with the remote modem. I send the command MSComm1.Output = "ATDT96477599" & vbCrLf to establish the communication and get "CONNECT 300" as a response. Then I need to login the noise station, so I send my password like this MSComm1.Output = "password" & vbCrLf. I get a stange response that consist on an unreadable string. Then after, if I try to send another command I get the response "NO CARRIER". I don't know what it means. Any help would be much appreciated.

Thanks

Rufen
0
Comment
Question by:Rufen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
6 Comments
 
LVL 5

Expert Comment

by:lidsky
ID: 9858619
It probably means that the modem on the other end hung up. Is the other side configured to hang up if the password is incorrect?
0
 
LVL 5

Expert Comment

by:lidsky
ID: 9858706
Also, since you seem to be receiving some rubbish back it may be that the phone line is very noisey, which may be causing the modem to hang up. This seems to be the case as your modem is negotiating a speed of only 300bps, or are you initializing the modem to that speed?
0
 
LVL 5

Expert Comment

by:lidsky
ID: 9858726
BTW, what is a noise station?
0
 

Author Comment

by:Rufen
ID: 9859497
Thanks everyone for your reply. I finally solve the problem. I just had to set the maximum port speed property to 300 and it works fine. For your information, a noise station is a station that records sound data related (dba). It is mainly used in airport or in factory to monitor sound level. You can have a look at Brüel & Kjaer web site to learn more. (I don't mean to do any publicity).

Rufen
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 12233692
PAQed, with points refunded (125)

Computer101
E-E Admin
0

Featured Post

Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Low Cost Managed Switch 19 130
New Aruba 2930f switches in lab.  Do they need to be configured to work? 21 323
Backup UPS - email alert 3 145
QoS on Cisco router 10 60
If you’re like me and you like peace and quiet, saving money, and pretty lights, then this article is for you. For financial reasons, I buy all the Cisco equipment for my home lab second-hand. The first thing to wear out is usually one of the coo…
When posting a question about a Cisco ASA, Cisco Router or Cisco Switch, it can aid diagnosis if a suitably sanitised copy of the config is provided. It is much better to leave as much of the configuration as original as possible, as it could be tha…

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question