Electrical Surges, ESD are very destructive to the equipment. To avoid it, make sure there is a low impedance discharge path from your computer to chassis ground.

To reduce the risk of damage or injury, please follow all steps or procedures as instructed.

Test Environments

CentOS-5.6

Kernel version: 2.6.18-238.12.1.el5

DAHDI: dahdi-linux-complete-current

Asterisk: 1.8.5.0

Libpri: 1.4.11.5

Hardware: OpenVox B200M

Chapter 1 Overview

1.1 What is Asterisk

The Definition of Asterisk is described as follows:

Asterisk is a complete PBX in software. It runs on Linux, BSD, Windows (emulated) and provides all of the features you would expect from a PBX and more. Asterisk does voice over IP in four protocols, and can interoperate with almost all standard-based telephony equipments using relatively cost-effective hardware. Asterisk provides Voicemail services with Directory, Call Conferencing, Interactive Voice Response, and Call Queuing. It supports three-way calling, caller ID services, ADSI, IAX, SIP, H323 (as both client and gateway), MGCP (call manager only) and SCCP/Skinny (voip-info.org).

QQ%E5%9B%BE%E7%89%8720150917152848

Figure 1 Topology

1.2 What is B200M

OpenVox B200M is a Mini PCI type III BRI card which supports 2 BRI S/T interface. All 2 BRI ports can be configured for TE or NT mode individually by jumpers. This port configuration is detected by the driver automatically.

The B200M consists of two parts: the B200MM and the B200MS. The B200MM connects Mini PCI slot while the B200MS provides S/T BRI interface connection.B200M S/T BRI interface card delivers great voice quality in the telephony systems. It can provide 4 simultaneous voices calls over 2 ISDN BRI line, turns your legacy ISDN BRI equipments into powerful Voice over IP devices and provides a soft migration path from ISDN technology to the new Voice over IP world. B200M is designed for building Open Source systems based on Asterisk such as ISDN PBX and VoIP gateway. The B200M and drivers comply with fully GPLed for the Linux kernel bring powerful ISDN BRI connectivity to your Linux machine.

B200M works well with Asterisk^®, Elastix^®, FreeSWITCH^™, PBX in a Flash, trixbox^®, Yate^™ and IPPBX/IVR projects as well as other Open Source and proprietary PBX, Switch, IVR, and VoIP gateway applications.

Target applications

High Performance ISDN PC Cards
ISDN PABX for BRI
VoIP Gateways
ISDN LAN Routers for BRI
ISDN Least Cost Routers for BRI
ISDN Test Equipment for BRI

Main features

Up to 2 ports of S/T interfaces
Support Mini PCI type III
2 RJ-45 interfaces on a single PCI bracket
ITU-T I.430 and TBR 3 certified and S/T ISDN supporting TE/NT mode
Design for low power systems
DTMF detection on all B-channels
Multiparty audio conferences bridge
Each of the 2 ports can be independently configured for TE or NT mode
RoHS compliant
Certificates: CE, FCC, A-Tick
trixbox ^TMOfficially Certified
Elastix^®Officially Certified

Chapter 2 Hardware Setup

There are some points should be paid attention to when setting up B200M.

2.1 Power supply

The board is powered by Mini PCI slot, which provides +3.3V,it works well on TE mode; but if you need to use NT mode, a power supply converter named PFM100 is necessary to apply together, which can be used for NT mode of B100M/B200M/B400M. More information about PFM100 please refer to HERE.

2.2 Slot compatibility

B200M is compatible with 32-bit 3.3V Mini PCI type III slot.

Figure 2 124 pin Mini-PCI Type III (Amp 1318228-1) connector

The Mini PCI specification uses a subset of the PCI signal set. Mini-PCI is a small form factor version of a PCI card. The Mini-PCI bus only uses 3.3 volts and the 32-bit PCI bus. Mini PCI type III slot is a 124-pin connector used with Type III Mini-PCI cards. The 124-Pin connector accepts a card edge and a board with fingers.

2.3 Setting Card ID

If want to install more than one card of B200M in a PC, you should take care of the card ID switch. The state of ON stands for “1”in binary, OFF represents “0”, and Card ID is calculated by binary. For instance, the two switches should be all set to OFF if there is only one card, which means their corresponding binary value is “00” and the decimal number is “0”. There two pieces of rules you must obey to set Card ID:

The ID of the first card must be set to 0, and the second should be set to 1, and so forth.
The first Card is a card that will be initialized (i.e. installing driver) firstly when the system boot up. 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 are more than one B200M on your machine.

Figure 3 Card ID Settings

2.4 Adjusting Termination of S/T Interface (100 ohm)

You are able to set a port to NT or TE mode, please refer to figure 4 for visualized information.

If a port works on NT mode, you should set jumper to CONNECT (ON).
If a port works on TE mode, theoretically it should be set to OPEN (OFF), but it might connect to some non-standard ISDN terminal equipments that do not have terminal resistors, for such equipments, you should set it to CONNECT(ON).
Use the connection cable to connect B400MM and B200MS. On the B200MM, there are two slots for RJ45 expansion board; the two slots are used to connect the slots on B200MS. The connection should be:

Figure 4 Cable connector

2.5 Power Feeding Connector

These jumpers control whether the card will feed power to the external isdn terminal. User should adjust accordingly from the following:

If the port works on TE mode, user MUST set the jumper to OPEN(OFF)
If this port works on NT mode, and the ISDN terminal requires ISDN power supply, users should set the jumper to CONNECT (ON).

And also need an accessory named PFM100, please refer to HERE.

While ISDN terminal does not require ISDN power supply, users should set the jumper to OPEN (OFF).

Figure 5 Jumper Setting

2.6 Hardware setup procedure

Power off your PC, remember to unplug the AC power cable
Set card ID as previously stated if there are more than one BRI card and set the jumpers on right.
Insert B200M into a Mini PCI slot
If needing providing power to external equipments, please refer jumper setting section for the detail.
Plug ISDN lines into RJ-45 interfaces which set as TE mode and ISDN phone lines into RJ-45 interface which set as NT mode
Fix the board by screws
Plug back the AC power cable, and power on PC

Caution: During the above processes, an ESD wrist strap is needed. Once power is on, you must not attempt to install or take down the board. After hardware setup appropriately, it is time to install software.

Chapter 3 Software Installation and Configuration

B200M supports DAHDI software driver on Linux. To make full use of B200M, you should download, compile, install and configure DAHDI, Libpri and Asterisk. Let’s make specific versions for an example to state how to install software.

3.1 Download

DAHDI software packages are available on OpenVox official website or Digium. Some patches should be applied when the driver source is from Digium. Therefore, it is recommended that downloading the DAHDI driver package from OpenVox official website.

Gain DAHDI source package from OpenVox:

http://downloads.openvox.cn/pub/drivers/dahdi-linux-complete/openvox_dahdi-linux-complete-current.tar.gz

Get Libpri and Asterisk software packages from Digium official website:

http://downloads.asterisk.org/pub/telephony/libpri/releases/libpri-1.4.11.5.tar.gz

http://downloads.asterisk.org/pub/telephony/asterisk/releases/asterisk-1.8.5.0.tar.gz

Execute the following commands under the directory of /usr/src/ in generally to download and decompress these packages:

#_wget_http://downloads.asterisk.org/pub/telephony/libpri/releases/libpri-1.4.11.5.tar.gz

# tar -zxvf libpri-1.4.11.5.tar.gz

#_wget_http://downloads.openvox.cn/pub/drivers/dahdi-linux-complete/openvox_dahdi-linux-complete-current.tar.gz

#_tar_-xvzf_openvox_dahdi-linux-complete-current.tar.gz

#_wget_http://downloads.asterisk.org/pub/telephony/asterisk/releases/asterisk-1.8.5.0.tar.gz

# tar -zxvf asterisk-1.8.5.0.tar.gz

If using Asterisk 1.8, it is not need to make any patches more.
If using Asterisk 1.6, please modify the file:asterisk-1.6.xx/channels/chan_dahdi.c.

Please comment out the following line:

Then add the following two lines after the above action:

3.2 Installation

1. Hardware detection

# lspci –vvvv

Check the outcome and confirm your system has recognized B200M. If it has been recognized, “ISDN controller” will be displayed in the output information like that:

Figure 6 Hardware detection

If B200M is not recognized by the system, you have to cut the server power off, take out the card to clean the slot and insert it into the mini PCI slot again.

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.

# yum install bison

# yum install bison-devel

# yum install ncurses

# yum install ncurses-devel

# yum install zlib

# yum install zlib-devel

# yum install openssl

# yum install openssl-devel

# yum install gnutls-devel

# yum install gcc

# yum install gcc-c++

# yum install libxml2

# yum install libxml2-devel

If there is no kernel-devel source in the system, users should run the following command to install the kernel-devel to peer current kernel:

# yum install kernel-devel-`uname –r`

While if there is no matched kernel-devel found, you should download matched RPM package to install it, or execute the following command to update to the latest and stable kernel version:

# yum install kernel kernel-devel

After installed, please reboot your machine to apply the new kernel and install the dependencies. If the dependency has been installed, system indicates that nothing to do which means you could go to next one directly. Otherwise, the system will keep on installing it.

Change to the directory of dahdi-linux-complete-XX (XX represents DAHDI version), then perform commands one by one to install DAHDI.

# cd /usr/src/dahdi-linux-complete-current

# make

# make install

# make config

Caution: If there is something wrong after “make“, please refer to HERE. In the url link, the moderator introduces you a method how to patch. After patching, save your changes and exit. Then run “make“ again, if successfully done, it is time for you to install Libpri and Asterisk.

Please execute those commands to install Libpri and Asterisk:

# cd libpri-1.4.11.5

# make

# make install

# cd asterisk-1.8.5.0

# ./configure

# make

# make install

# make samples

“ 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, Libpri and Asterisk, please load the driver by running commands:

# modprobe dahdi

# modprobe wcb4xxp

# dahdi_genconf

# dahdi_cfg -vvv

OpenVox B200M has great adaptive ability that it can be set as TE/NT mode automatically without any parameters. When the driver module “wcb4xxp” loaded, B200M card will be set as specific mode just depending on the hardware jumper settings. You can see the messages when execute a command below:

# dmesg|grep wcb4xxp

Figure 7 dmesg information

After running “modprobe dahdi” or “modprobe wcb4xxp”, there is not any information displayed if loaded normally and successfully. “wcb4xxp“ is the driver module name of B200M.

If there is any error, please trace the cause. Until all errors are clear up, you could execute “dahdi_genconf” again, and then go to the next step. By running “dahdi_genconf”, it will generate /etc/dahdi/system.conf and etc/asterisk/dahdi-channels.conf automatically. Checking whether the generated files information agrees with your hardware setup, if not, you should modify to your specific requirements. Do not forget to confirm that dahdi-channels.conf is included in chan_dahdi.conf, if not, run command:

# echo “#include dahdi-channels.conf” >> /etc/asterisk/chan_dahdi.conf

A part of system.conf which is one of the basic configuration files is displayed as follows:

Figure 8 A part of system.conf

2. Country mode modification

In order to match your country mode, it is need to change parameters loadzone and defaultzone to your country. For example, your system is inCHINA, you would like them change to:

loadzone = cn

defaultzone = cn

Some zonedata is available in the file

../dahdi-XX/tools/zonedata.c, you can refer to it to match your country mode. Meanwhile, you also need to modify another parameter which is in file /etc/asterisk/indications.conf.

country=cn

A part of file /etc/asterisk/dahdi-channels.conf is showed as below. (Modification, if it is not agree with the hardware setup. Here is an example that assumes port 1 is set to TE mode, port 2 are set to NT mode.)

Figure 9 A part of dahdi-channels.conf

3. Asterisk initiation

Execute a command to start Asterisk:

# asterisk -vvvvvvgc

If Asterisk is already activate, run “asterisk –r” instead.

In the CLI, please run the following commands

“dahdi show channels” and “pri show spans”:

Figure 10 channels and spans show

If you can see the span is up, active and not “In Alarm”, it means successful installation. Otherwise, please check the setting files and physical connections.

4. Dialplan edit

You should make sure that the context “from-isdn“ and “from-internal“ are in extensions.conf. Here a simple example is given.

# vim /etc/asterisk/extensions.conf

Figure 11 dialplan

After saving your dialplan, please run “asterisk –r”, then execute “reload” in the CLI. Now you are able to make calls. The above dialplan achieves that:

If there is a call from the ISDN line, Asterisk will transfer to SIP extension 100, then the SIP phone rings;
If SIP extension 100 dials any phone number, Asterisk will transfer to the destination phone through the first channel.
If SIP extension 100 dials any channel number, Asterisk will transfer to the destination ISDN phone which connects to the channel.

Chapter 4 Reference

Tips

Any questions during installation please consult in our forum or look up for answers from the following websites:

Forum

wiki

Appendix A Specifications

• Weight and size

Weight: B200MM:16g (0.56oz)

B200MS:27g (0.95oz)

Size: B200MM:5.9×4.4×0.7cm (2.32×1.73×0.28 inch)

B200MS: 6.9×4.1×1.4cm (2.72×1.62×0.55 inch)

• Interfaces

PCI Bus: 3.3V Mini PCI type III

LocalLoopAccess: RJ-45 ports used on certain ISDN S/T/U interfaces

• Environment

Temperature: 0 ~50°C (Operation) – 40 ~125°C (Storage)

Humidity: 10 ~90% NON-CONDENSING

• Power consumption

Voltage: 3.3V/ 38V (NT only)

Power Dissipation Max: 0.44W /4.4W

• Hardware and software requirements

RAM 32+ MB

Linux kernel 2.6.X

CPU 200+ MHZ

Appendix B PIN Assignments

Basic Rate ISDN lines can use straight (“flat”) modular cable if necessary. However, twisted-pair are more often used.

l ISDN U-interface

8-pin RJ45 port	PIN	Color	Description
	1	White/Orange	N/A
	2	Orange	N/A
	3	White/Green	N/A
	4	Blue	U interface
	5	White/Blue	U interface
	6	Green	N/A
	7	White/Brown	-48VDC Power (optional)
	8	Brown	-48VDC Return (optional)

The U-Interface is most commonly used in North American Basic Rate ISDN systems. The U-Interface is an 8-conductor, modular, RJ-45 jack. The center two pins (pin 4 and 5) are used for the 2-wire loop. The wiring of pin 4 and pin 5 are not polarity sensitive (e.g. 4 and 5 may be crossed).

Optional -48 VDC power may be utilized on RJ-45 pins 7 and 8. This can be used to power the NT-1 and TE equipments if sufficient power is available. In most cases, power is not provided from the telephone company.

l BRI S-Interface

8-pin RJ45 port	PIN	Color	Description
	1	White/Orange	N/A
	2	Orange	N/A
	3	White/Green	Receive+
	4	Blue	Transmit +
	5	White/Blue	Transmit –
	6	Green	Receive –
	7	White/Brown	-48VDC Power(optional)
	8	Brown	-48VDC Return (optional)

The BRI S-Interface is a 4-wire interface, with separate Transmit and Receive pairs. It can be operated in four modes:

Point-to-Point Mode allows one logical terminal that may be up to 1 KM from the NT-1
Short Passive Bus Mode allows connection of up to 8 terminals in parallel on the S/T bus. The terminals can be within 100 to 200 meters from the NT-1.
Extended Passive Bus Mode allows connection to 8 terminals at distances of up to 500 meters from the NT-1.
Star Bus Mode allows interconnection of up to 8 terminals to a central NT-1. Each terminal can be up to 1 KM from the NT-1.

² The NT-1 unit has configurable jumpers to apply a 100-ohm termination to the S-Interface signal pairs. Usually, these jumpers will be in. Rules of termination is similar to that of the SCSI-bus: the NT-1 will have 100-ohm terminators applied, and the farthest TE1/TA device will have 100-ohm terminators.

² Optional power to the NT-1 can be applied from pins 7 and 8 of the S-Interface RJ-45 jack. This is usually not used.

² Many NT-1 units provide “phantom-power” (sealing current) between the transmit (4,5) and receive (3,6) leads. In these cases, the Transmit (4,5) leads will be negative with respect to the Receive (3,6) leads. This is often selectable in the NT-1. Whenever possible, it is recommended that this option be disabled. As a general rule-of-thumb, most PC cards, routers, and other data communications equipment do not require power from the S/T interface. ISDN telephones usually require power from the S/T interface.

² Most NT-1 units will ship with a wall-mount transformer power supply for the NT-1.

B200M on DAHDI User Manual

General Safety Instructions

CAUTION

Test Environments

Chapter 1 Overview

1.1 What is Asterisk

1.2 What is B200M

Target applications

Main features

Chapter 2 Hardware Setup

2.2 Slot compatibility

2.3 Setting Card ID

2.4 Adjusting Termination of S/T Interface (100 ohm)

2.5 Power Feeding Connector

2.6 Hardware setup procedure

Chapter 3 Software Installation and Configuration

3.1 Download

3.2 Installation

1. Hardware detection

2. Software installation

3.3 Configuration

1. Driver loading

2. Country mode modification

3. Asterisk initiation

4. Dialplan edit

Chapter 4 Reference

Tips

Appendix A Specifications

• Weight and size

• Interfaces

• Environment

• Power consumption

• Hardware and software requirements

Appendix B PIN Assignments

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CONTENTS