Knowledge Base

The Digium Knowledge Base is a searchable library of troubleshooting advice and current information updated by Digium support technicians.
Search:     Advanced search
Browse by category:
Contact Us
Knowledge Base / Hardware / Products / Analog Interface Cards / TDM2400P
Showing: 1-20 of 35    »»
Articles
 
document What is fxotune and how do I use it?
Q. I have echo problems on my FXO modules and I've tried the different echo cancellation algorithms in zconfig.h, tried tweaking the gains, and still...
08 Nov, 2006
document I am hearing an echo. What can I do to fix this?
Please upgrade to the latest release of Zaptel available from .  Recent versions of Zaptel include a significantly improved software echo...
14 Mar, 2008
document How do I install Zaptel on a machine running Debian?
First, make sure that you have all the needed software dependencies.  The following site should give you a good idea of what software packages...
14 Mar, 2008
document How do I setup caller ID?
For setting up callerid, make sure that 'usecallerid=yes', and 'callerid=asreceived'.  You may have to adjust the callerid signaling...
14 Mar, 2008
document How do I install the Zaptel drivers on a system running Fedora Core?
First, make sure that you have all the needed software dependencies.  The following site should give you a good idea of what software packages...
14 Mar, 2008
document Asterisk does not properly detect when a caller hangs up the phone. How do I fix this?
There are several settings in zaptel.conf and zapata.conf that you can experiment with.  If you are using loopstart, try using kewlstart...
14 Mar, 2008
document How do I install Zaptel drivers on a system running Redhat?
You need to download the kernel source, and make two folders, linux, and either linux-2.4 or linux-2.6, (depending on which kernel you have, 2.4 or...
14 Mar, 2008
document Do I need a sound card for music on hold or voicemail?
No. The sound card is only for paging or using a headset to make calls.
14 Mar, 2008
document What kernel modules are used for which piece of Digium hardware?
Card Module
14 Mar, 2008
document Why do I hear echo when I make a call?
In the analog phone world, FXS and FXO interfaces combine the receive and transmit signal on a single pair using a device called a hybrid. Because...
14 Mar, 2008
document What are the differences between FXS and FXO interfaces?
FXS (Foreign eXchange Station) is an interface which drives a telephone. FXS interfaces get phones plugged into them, delivery battery, and provide...
14 Mar, 2008
document What is the difference between loopstart, groundstart, and kewlstart signalling?
Loopstart signalling is used by virtually all analog phone lines. It allows a phone to indicate on hook/offhook, and the switch to indicate ring/no...
14 Mar, 2008
document I'm using Cybiolink P-1 ADSI analog phone with Asterisk. Unfortunately sometimes when I make a call Asterisk doubles or skips some DTMF's resulting in a wrong number. Can you help ?
You can add following line to /etc/asterisk/zapata.conf configuration file for every channel that experiences described problem:relaxdtmf=yes
14 Mar, 2008
document I'm using X100P/TDM400P/TDM2400P and I have random call hangups. What can I do ?
If you have busydetect=yes or callprogress=yes in zapata.conf then this is propably causing the problem. You might want to try to set busycount=10 if...
14 Mar, 2008
document What do I do if I can't compile Zaptel package on my system ?
In order to compile zaptel package on your system you need to have the kernel source version matching the kernel version that is already running on...
14 Mar, 2008
document Why does modprobe hang while loading a Zaptel kernel module?
If modprobe hangs while loading a zaptel kernel module, try the following:     1. Remove all zaptel-related entries from...
14 Mar, 2008
document What should I do if my FXS fails calibration?
Try compiling the kernel without frame buffer support.
14 Mar, 2008
document How do I fix echo over VoIP when a Digium card is in the call path?
For Zaptel channels, Asterisk has built in EchoCancellation. To enable this you must edit your zapata.conf to read:    ...
14 Mar, 2008
document Why is my card getting an IRQ miss?
Each peice of hardware takes 1,000 interrupts per second. When, for some reason the cards get less than this, an IRQ miss occurs. You can see if the...
14 Mar, 2008
document Why do I get an NMI error?
NMI errors come from the kernel. An NMI is a (N)on (M)askable (I)nterrupt. They can be caused by various parts of the system, and they usually occur...
14 Mar, 2008
RSS Powered by KBPublisher (Knowledge base software)