1) Libtiff - This is the only package, required by spandsp. This package provides support for the Tag Image File Format( TIFF). This is a format, used for storing image data. If you need more information about the TIFF format, you can follow the link in our references. Libtiff contains the library, used for the reading and writing of TIFF files, on UNIX-based systems.

To install the libtiff package, go to the main website of libtiff, which is. Go to the download section - and download the desired package. According to the information from the spandsp web site, the libtiff version 3.5.7, 3.6.0 or 3.7.1 works OK. NOTE: For this tutorial we will use the libtiff version 3.7.1. Now, go to the directory where you downloaded the file and unzip it.

T.38 Passthrough Support. To integrate T38Fax.com with Asterisk to connect a fax machine to a T.38 capable ATA. This will allow a fax machine to send and receive calls via T38Fax.com with Asterisk in the middle.

Enter the directory, where the unzipped files are- cd tiff- version. Execute the following commands, one by one. So, we have registered the user sip_fax. Type=friend means that this user can make and receive calls.

Host=dynamic means that the IP is not static but dynamic through a DHCP server. Allow=all means that the line which this user will use, could support all audio codecs. Context=test1 - this shows that this user is working with the extensions in this context of the configuration file. IMPORTANT: You can send and receive faxes with spandsp only through the G.711(alaw or ulaw) codecs. Extensions.conf Configurations. There are a few settings which you have to do in the ATA.

Using the web interface go to the Advanced Settings. Set the SIP Proxy Server. This is the IP address of your Asterisk Server.

In our case the IP is 10.3.3.34, but in your case it could be different. For the Outbound Proxy set the same IP address (The IP address of your Asterisk). For the SIP User ID, write the name of the user, as it is set in your file. In our case this is sip_fax. In your case it could be different. Authenticate ID - write the same username as in the previous option. In our case again sip_fax.

Authenticate Password is related with the secret setting in the file. So here you have to write the same as you have written in the secret option for the user which you are going to use. In our example we have set for the user sip_fax, a secret=sip_fax. So for Authenticate Password, we will write again sip_fax. In your case could be different. Do not forget, that you can send faxes through the spandsp only by using the G.711 (ulaw or alaw) codec.

So, it is very important to set the preferred codecs for the to either PCMA(alaw) or PCMU(ulaw). In our case the codecs are set to PCMU(ulaw). The most import option which you have to set is the FaxMode. It is set to T.38(Auto Detect) by default. You have to change it to Pass-Through.

[app_txfax.so]Oct 5 12:05:24 WARNING[14665]: loader.c:314 __load_resource: /usr/lib/asterisk/modules/app_txfax.so: undefined symbol: fax_set_header_info Oct 5 12:05:24 WARNING[14665]: loader.c:543 load_modules: Loading module app_txfax.so failed! Ewqlso keygen generator free. Error while writing audio data:: Broken pipe When you execute the asterisk -vvvvvvvc command and the Asterisk crashes when you try to execute the safe_asterisk command, then very probably you have the following problem: The previously installed version of spandsp has been 0.0.3, but now you have installed version 0.0.2. The problem is that the installation of version 0.0.3 creates a symlink, which is not replaced by installation of version 0.0.2. So the symlink points to the library of version 0.0.3, which actually does not exist. The solution is to find the location of this symlink and to delete it manually.