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Knowledge Base / Hardware
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Showing: 1-20 of 78 »»
Articles
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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How can I find an IAXy on my network?
The Iaxy will respond to pings on port 9999. You can ping your broadcast IP on your network and listen with tcpdump on your network on port 9999...
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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...
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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
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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.
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Which pins of the crossover cable are for TX- TX+ RX- RX+?
1: RX-, 2: RX+, 4: TX-, 5: TX+
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Where can I find a motherboard with 3.3 volt slots for the TE410P/TE411P/TE210P card?
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What are the Power Requirements for the S100I(Iaxy)?
The limited release of the S100I (original blue/orange enclosed iaxy) did not come with a power supply. You will need a 9-volt switched or regulated...
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What kernel modules are used for which piece of Digium hardware?
Card
Module
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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...
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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...
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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...
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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
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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...
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