Solved

making t38modem work with asterisk and Hylafax on Linux system

Posted on 2014-07-21
7
1,351 Views
Last Modified: 2014-08-11
I am trying to set up t38modem on an asterisk 11 system with Hylafax.  The system is fully working with IAXmodem but I find I am getting too many errors.  I have successfully compiled the latest version of t38modem and it appears to run properly.  I have it registered to SIP and working with faxgetty.  My problem is that I can't get it to successfully connect with another fax.  I keep getting 'busy signal detected' errors when sending even though the call goes through and the other end answers.  I also get 'no carrier detected' when receiving.  It appears to be a configuration issue but I can't find very much information on configuration.  I am looking for the proper parameters to use in launching t38modem and setting up the faxgettys.  Thank you.
0
Comment
Question by:jaym25
[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
  • 4
  • 3
7 Comments
 
LVL 15

Expert Comment

by:Phonebuff
ID: 40211891
Make sure your SIP provider is support T38..  Many still do not --
0
 

Author Comment

by:jaym25
ID: 40212195
Thank you,  However, the problem I am having is with the setup.  I am using a gateway with analog lines and t38 capability and I want to get it working with that first.  I just can't find a resource that explains how to set up the t38modem parameters with Hylafax and Asterisk and how to startup the t38 and faxgetty daemon processes where t38modem will actually complete a call.

It appears that you must start multiple T38 tty's per t38modem instance and link them together.  It also appears that you are only allowed to make 1 SIP assignment per instance even though it appears you've created 2 or 3 separate modems for each instance.  This part is very different from the way IAXmodem works and is the part I don't understand.

If you don't have an answer, perhaps you can point me to a resource or a person who may be able to explain or assist.  Thank you.
0
 
LVL 15

Expert Comment

by:Phonebuff
ID: 40212211
Well based on your description I am a little confused --  

Are you defining the ATA (is it T-38 Enabled) as a trunk or as an extension ?  

As a Trunk standard out bound routes would apply, as an extension maybe a Ring Group round robin ..

For detail support check out the mailing lists at http://www.hylafax.org/content/Main_Page.  

-----------------------  Hope I helped.
0
Get Actionable Data from Your Monitoring Solution

Your communication platform is only as good as the relevance of the information you send. Ensure your alerts get to the right people every time with actionable responses. Create escalation rules that ensure everyone follows the process and nothing is left to chance.

 

Author Comment

by:jaym25
ID: 40212413
I have read the Hylafax information top to bottom and actually have Hylafax working very well with the T-38 enabled FXO gateway and IAXmodem using individual line selections as opposed to round robin.  I am not trying to create a high volume fax server.  I simply want 2 or 3 lines that work well through my system to take advantage of email2fax and fax2email features which I have implemented in my integrated system.  The logic works properly, with both Asterisk and the gateway (a Grandstream GXW4108) .

The problem I am having is a high number of communications failures that seem to be common with IAXmodem (an analog soft modem using spandsp) on an IP system.  I tried using Asterisk's T-38 Gateway mode with IAXmodem but that doesn't seem to give much improvement.

It is my intention to have t38modem replace IAXmodem to take advantage of Asterisk 11's t38 pass-through capabilities.  My specific problem is the proper configuration of t38modem for which I can find very little information.
0
 
LVL 15

Expert Comment

by:Phonebuff
ID: 40212452
Sorry, I am a basic user and use it incoming fax2email only.   However when I have issues I need to resolve a post to the hylafax-users  list at the site usually get's me the fastest answers.  

=======
0
 

Accepted Solution

by:
jaym25 earned 0 total points
ID: 40244423
For now, I have decided to stay with IAXmodem.  It is working pretty well.
0
 

Author Closing Comment

by:jaym25
ID: 40252690
Never was able to get T38modem working properly.
0

Featured Post

Enroll in June's Course of the Month

June's Course of the Month is now available! Every 10 seconds, a consumer gets hit with ransomware. Refresh your knowledge of ransomware best practices by enrolling in this month's complimentary course for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

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

Ever wanted to query Cisco Call Manager CDR records from MS SQL Server? Here's how! CUCM can be configured to upload a CDR file to a given FTP server every minute. This article will show you how to set this up, schedule the import of this data an…
As companies replace their old PBX phone systems with Unified IP Communications, many are finding out that legacy applications such as fax do not work well with VoIP. Fortunately, Cloud Faxing provides a cost-effective alternative that works over an…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

696 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