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General Safety Instructions
CAUTION
- The computers that have D830P/DE830P card installed must comply with the country’s specific safety regulations.
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- To reduce the risk of damage or injury, please follow all steps or procedures as instructed.
Test Environments
CentOS-6.3
Kernel version: 2.6.32-279.el6.i686
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Hardware: OpenVox D830P/DE830P
Chapter 1 Overview
1.1 What is Asterisk
The Definition of Asterisk is described as follows:
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Figure 1 Topology
1.2 What is D830P/DE830P
DE830P is a D830P with an EC module, they are new products of the Digital cards. It’s supposed to be the most advanced 8 port T1/E1/J1 Asterisk® card with superior quality in the open source community. The leading innovation ensures users to adjust the interrupt frequency to reduce the CPU load up to 70% and adjust the interrupt pin to avoid interrupt number sharing or conflict. DE830P offers an on-board Octasic® DSP-based echo cancellation module. It supports T1, E1, and J1 environments and is selectable on a per-card or per-port basis. The Octasic® DSP-based EC module enables users to eliminate echo tails up to 128ms or 1024 taps across all 256 channels in E1 mode or 192 channels in T1/J1 modes. Furthermore, this module takes advantage of the Octasic® Voice Quality Enhancement to provide superior sound quality on all calls. D830P/DE830P supports industry standard telephony and data protocols, including Primary Rate ISDN (both N. American and Standard Euro) protocol families for voice, PPP, Cisco, HDLC, and Frame Relay data modes. Both line-side and trunk-side interfaces are supported.
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- Voice-over Internet Protocol (VoIP) Services
- Complex IVR Trees
- "Meet-Me" Bridge Conferencing
- Calling Card Platforms
- VoIP Gateways (support SIP, H.323, and IAX)
- Legacy PBX/IVR Services
- Voice/Data Router (replace expensive routers)
- PRI/Switch Compatibility-Network or CPE
Chapter 2 Hardware Setup
There are some points that should be paid attention to when set up D830P/DE830P.
2.1 Span type setup
Each DIP switch controls one span configuration for E1 or T1 mode. Setting DIP1 to ON means SPAN1 will be E1.Setting DIP1 to OFF means SPAN1 will be T1.
2.2 Card ID switch setup
If want to install more than one card of D830P/DE830P in a PC, you should take care of the card ID switch. There are two pieces of rules you must obey:
- The first Card must be set to 0, which is a card that will be initialized (i.e. installing driver) firstly when the system boot up. And the second should be set to 1, and so forth.
- At most cases, Linux will initialize PCI devices according to their slot order. The slot nearest to the CPU will be initialized firstly and the far end slot will be initialized at last. That is to say, the card which is nearest to the CPU ID should be set to 0 if there is more than one D830P/DE830P on your machine.
2.3 Slot compatibility
D830P/DE830P is compatible with 32-bit 5.0V PCI slot, 64-bit 3.3V PCI slot or 64-bit 5.0V PCI slot except PCI-E slot; you should confirm your slot type and insert D830P/DE830P into any type of PCI slot as previously described.
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Figure 2 PCI-E and PCI slot
2.4 Timing cable
If you have just one card in the system, all channels on that card have already run under the same clock source, so timing cable is unnecessary. But if there are more than one card, using timing cable has some advantages. Before using the clock line, each card works on its own clock, therefore precision of the clock is limited; each card will send /receive voice data at different speeds. In voice usage, this small issue can be omitted, but in data communication such as Fax/Modem, it will cause big problems. Data loss will cause communication broken or fax broken. Timing cable will force all cards to work at the same clock source, send data at the same speed, as a result no data will lost.
If you found J914 (input) and J915 (output) interfaces on the card, it means the card supports clock line, for details, please refer to HERE.
Chapter 3 Software Installation and Configuration
D830P/DE830P supports DAHDI software driver on Linux. To make full use of D830P/DE830P, you should download, compile, install and configure libpri, DAHDI and Asterisk.
3.1 Download
DAHDI software packages are available on OpenVox official website or Digium. Some patches should be added while the driver source is from Digium, therefore, it is recommended that downloading the DAHDI driver package from OpenVox official website.
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# tar –zxvf libpri-1.4.11.5.tar.gz
3.2 Installation
1. Hardware detection
# lspci –vvvv
Check the outcome and confirm your system has recognized D830P/DE830P. If it has been recognized, the output information will be displayed like that:
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If D830P/DE830P is not recognized by the system, you have to power off and take out the card, then try to insert it into other PCI slot.
2. Software installation
Some dependencies are crucial. If any of them is absent, the software installation process would not go through successfully. Let’s run "yum install XX" (XX stands for the dependency’s name) to check the availability of dependencies.
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" make samples"will install the standard sample configuration file in the directory /etc/asterisk. As a freshman, you should perform "make samples", that is to say, it is unnecessary to perform "make samples" every time. Because once performed, it will cover the old sample configuration files you have installed.
3.3 Configuration
1. Driver loading
After compiling and installing DAHDI and Asterisk, please load the driver by running:
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Figure 4 A part of system.conf
2. Country mode modification
In order to match your country pattern, you need to change parameters loadzone and defaultzone to your country. For example, your system is in CHINA, you would like them change to:
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Figure 6 Channel map
3. Asterisk initiation
# asterisk –vvvvvvvgc
If Asterisk is already activate, run "asterisk –r" instead. In the CLI, please run the following command:
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If DAHDI channels are found, it means they have been loaded into Asterisk successfully. You are going to edit dialplan by your requirements.
4. Dialplan edit
Users must make sure that the context "from-pstn" and "from-internal" are in extensions.conf, here a simple example is given:
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Figure 9 echo detect
Chapter 4 Reference
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The pin assignments are identified as the following shows.
D830 Series Splitter P1 RJ45 Telco Port Connector
8-pin RJ45 port | PIN | Description |
| 1 | Rx (Pin 1 on Splitter A) |
2 | Rx (Pin 2 on Splitter A) | |
3 | Tx (Pin 4 on Splitter B) | |
4 | Tx (Pin 4 on Splitter A) | |
5 | Tx (Pin 5 on Splitter A) | |
6 | Tx (Pin 5 on Splitter B) | |
7 | Rx (Pin 1 on Splitter B) | |
8 | Rx (Pin 2 on Splitter B) |
DE830 Series Splitter P2-A and P2-B RJ45 Telco Port Connector
8-pin RJ45 port | PIN | Description |
 | 1 | Rx |
2 | Rx | |
3 | Not used | |
4 | Tx | |
5 | Tx | |
6 | Not used | |
7 | Not used | |
8 | Not used |