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 / Digital Interface Cards / Quad Span
Showing: 1-20 of 47    »»
Articles
 
document How do I make a T1/E1/J1 loopback connector?
Building a T1/E1 Loopback Connector. In order to perform a loopback test, a loopback plug is needed. A T1/E1/J1 loopback connector can easily be...
14 Mar, 2008
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 When will the LED's light up on my TDM400P/TE110P/TE2XXP/TE4XXP?
For the TDM400P and TE110P cards, the LED's will not be lit up until the kernel module is loaded. The TDM400P LED's will light up when the ports are...
14 Mar, 2008
document What kind of cable do I use to connect to a channel bank?
You will need a T1 crossover cable. The pin outs are 1, 2, 4, 5 1 - 4 2 - 5 4 - 1 5 - 2
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 Which pins of the crossover cable are for TX- TX+ RX- RX+?
1: RX-, 2: RX+, 4: TX-, 5: TX+
14 Mar, 2008
document Where can I find a motherboard with 3.3 volt slots for the TE410P/TE411P/TE210P card?
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 am unable to break dialtone with a channel bank and a T1 card.
Check to make sure all your spans are enabled in the /etc/zaptel.conf, if not correct the error and reload the module module. A complete example to...
14 Mar, 2008
document I have two cards: E100P and T100P (E400P and T400P). How can I tell which one is E1/T1 ?
You can recognize it when you read the numbers on a Dallas chip: DS21552 - single T1 DS21554 - single E1 DS21Q352 - quad T1 DS21Q354 - quad E1
14 Mar, 2008
document I have TE410 and want to use it with 24 FXS T1 channel band and 8 FXO/16 FXS T1 channel bank and two E1 spans. How do I configure the config files ?
If you use the 1st span for 24 FXS channel bank and 8/16 for the second span and the rest for E1 PRI ISDN the config should look like this:...
14 Mar, 2008
RSS Powered by KBPublisher (Knowledge base software)