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1. Transcoding CT200E User Manual Transcoding Card CT200E User Manual This document has been prepared for use by professional and properly trained personnel and the customer assumes full responsibility when using it Introduction to CT200E Series Documentation This manual contains product information for the CT200E Series cards The manual is organized in the following manner Chapter Appendix Title Description Identifies the features of your card This chapter covers applications and uses of the 1 Overview CT200E Series in the real world Provides instructions for installing the card in your PC acquiring correct drivers and 2 Card Installation checking device compatibility 3 Configuration Provides configuring options 4 Specifications Details card specifications 5 Reference Helpful Reference web sites Glossary and 6 Acronyms Defines terms related to this product Version 1 0 Page 1 Transcoding Card CT200E User Manual Table of Contents iste ccc dees eae ace A ated tee E 3 Card Installation cossentens 4 Unpacking th esseere 4 Shipment IS PE CMON 4 Slot Compatibility ce 4 Hardware Installation2. 4 SO Meare 4 Installation Test Environment 5 Asterisk compilation amp 1 6 Allo Transcoding Card 6 Conf ouratlON anog nee rene rene en 7 Configuring the System for 7 Status Of CIG EE 7 TESINE arisane 8 8 PN LN 9 9 Glossary and 9 1 0 Page 2 Transcoding Card CT200E User Manual Overview The CT200E Series cards are PCI E base cards The CT200E Series cards are designed to handle transcoding in dedicated DSP hardware it supports multiple voice codecs to digitally compress voice signals and save on bandwidth This function would otherwise be done by Asterisk in software VoIP communication needs the capability to mediate between endpoints supporting different codecs but this
3. x 94 3 mm Physical card dimension Length PCI Express Bus Compliant with Interfaces PCI E X1 1 0 or greater Temperature 0 to 50 C 32 to 122 F operation Environment 20 to 65 C 4 to 149 F storage Humidity 10 to 90 non condensing G 729a 8 0 Kbit G 723 1 5 3 Kbit and 6 3 Kbit u law a law Supported Codecs Reference http www allo com http www linuxfoundation org collaborate workgroups networking bridge http www asterisk org http www voip info org Glossary and Acronyms a law Mainly used in European telephone networks for the conversion between analog and digital signals in PCM applications Similar to the North American mu law standard Bandwidth The capacity to carry traffic Higher bandwidth indicates the ability to transfer more data in a given time period Version 1 0 Page 9 Transcoding Card CT200E User Manual bps bits per second A measurement of transmission speed across a data connection DTMF Dual Tone Multi Frequency Push button or touch tone dialing G 711 A recommendation by the Telecommunication Standardization Sector ITU T for an algorithm designed to transmit and receive mulaw PCM voice and A law at a digital bit rate of 64 Kbps This algorithm is used for digital telephone sets on digital PBX G 723 1 A recommendation by the Telecommunication Standardization Sector ITU T for an algorithm designed to transmit and receive au
4. your CT200E card you will need Full Linux kernel 2 6 15 or later source code Development libraries and headers for ncurses Development libraries and headers for zlib and openssl Development libraries and headers for newt GCC and standard software build tools Bridge tools brctl Installation Test Environment considered OS CentOS 5 5 32 or 64 bit Kernel version 2 6 18 194 615 Asterisk version Asterisk 1 4 43 Hardware ALLO Transcoding card Library allotc libraries 1 After inserting the card into your PCle slot boot your machine to Linux and execute the following command to list the devices detected by the PCI bus lspci Confirm the output lists a device with Allo com s PCI vendor ID which is BCM57761 The output will be similar to the following 02 00 0 Ethernet controller Broadcom Corporation NetXtreme BCM57761 Gigabit Ethernet PCIe rev 10 Note The output of Ispci may or may not state Allo com If it does not this does not indicate a problem The Allo com card identifier should be listed If a card identifier is not listed then your machine is not PCI 2 2 or higher and the card will not work 2 To install asterisk in CentOS we have to install the following prerequisite packages bison bison devel zlib zlib devel openssl openssl devel gnutls devel flex gcc gCC C Execute the following command to install the above mentioned packages yum install bison b
5. anual Card Installation This chapter provides the following information Unpacking the Card Shipment Inspection Slot Compatibility Hardware Installation Software Installation Unpacking the Card When you unpack your card carefully inspect it for any damage if present please contact and report to allo com support Shipment Inspection The following items are included in the shipment of the CT200E card CT200E PCle e Installation CD Slot Compatibility Check the type of card you received to be sure it is compatible with your PCle slot The CT200E will work in any PCI Express 1 x compliant slot Hardware Installation 1 Power down your computer and unplug it from its power source 2 Remove the bracket place holder and insert the card into the PCI Express slot 3 Replace the cover to your computer Software Installation Allo com Digital cards hardware are only supported under Linux It requires drivers and libraries which are not integrated with the Linux kernel Recommended Linux distributions CentOS Debian Red Hat and Ubuntu Drivers and application software may be obtained from Allo com s download server at http www allo com transcoding card html For an introduction to Asterisk including additional information on its configuration setups and features please refer to http www asterisk org Version 1 0 Page 4 Transcoding Card CT200E User Manual To install
6. asterisk and change the rtpip lt your machine ip gt 2 Configure SIP extensions by allowing all the codecs allow all Status of card 1 Make sure the transcoding sessions are configured properly in the asterisk CLI prompt Localhost CLI gt allo show translators You should see the codec translators configured Version 1 0 Page 7 Transcoding Card CT200E User Manual Testing After installing the codec_allotc so module you can check the codecs which you have enabled in the configuration As shown in following command CLI gt core show translation Translation times between formats in microseconds for one second of data Source Format Rows Destination Format Columns g723 gsm ulaw alaw 4726 12 adpcm slin 1 10 4729 speex ilbc 4726 4722 slin16 4001 2 1 2001 1 1999 ulaw 2001 alaw 2000 4726 12 adpcm slin lpc10 g729 speex ilbc g726 g722 511016 Limitations Allo com transcoding card comes with some of limitations which are listed below 1 G711 a u law codec transcoding will be done for max 50ms of latency 2 You might be expressing some delay if the other codec has 60ms or greater latency Version 1 0 Page 8 Transcoding Card CT200E User Manual Specifications This chapter provides specifications required environmental conditions for the CT200 Series cards Size 63 5 mm height
7. dio over telephone lines at 6 3 Kbps or 5 3 Kbps G 729a A recommendation by the Telecommunication Standardization Sector ITU T for an algorithm designed to transmit and receive audio over telephone lines at 8 Kbps iLBC internet Low Bitrate Codec A free speech codec used for voice over IP It is designed for narrow band speech with a payload bitrate of 13 33 kbps frame length 30ms and kbps frame length 20 ms Interface A point of contact between two systems networks or devices Linux A robust feature packed open source operating system based on UNIX that remains freely available on the internet It boasts dependability and offers a wide range of compatibility with hardware and software Asterisk is supported exclusively on Linux Multiplexing Transmitting multiple signals over a single line or channel FDM frequency division multiplexing and TDM time division multiplexing are the two most common methods FDM separates signals by dividing the data onto different carrier frequencies and TDM separates signals by interleaving bits one after the other MUX multiplexer A device which transmits multiple signals over a single communications line or channel See multiplexing Version 1 0 Page 10 Transcoding Card CT200E User Manual PBX private branch exchange Asmaller version of a phone company s large central switching office Example Asterisk PCI peripheral component interconnect A standard bus us
8. e with Trix Box Elastix Installation Operating Systems Other than Trix Box Elastix should mention the asterisk source said For E g install sh usr src asterisk 1 x x for OpenSuse use open_suse_install lt asterisk source path gt 6 The script will prompt you to enter the transcoding card based on the MAC address E g CHOOSE THE ETERNET DRIVER IN WHICH YOU HAVE HWaddr 00 17 F7 00 00 00 Eg If transcoding card interface is eth2 select 2 7 The script will prompt you to configure ip address for transcoding card configure IP address different from your network E g CHOOSE DIFFERENT IP OTHER THAN YOUR NETWORK FOR TRANSCODING CARD Eg 10 1 1 1 8 Script will prompt you to select the transcoding card depending upon the MAC id 00 17 F7 XX XX XX E g Please select device to configure 1 1 q quit 1 Version 1 0 Page 6 Transcoding Card CT200E User Manual 9 Setup the IP address for DSP in the transcoding module only the last octet E g Specify last octet of the IP addres 1 255 or lt enter gt for default 10 Configure the port range with given interval E g Specify udp base value 9000 65000 or lt enter gt for default Configuration This chapter provides a step by step instruction to configure the CT200E transcoding card Configuring the System for Transcoding 1 Finally change the RTP IP address in the file allo_codec conf available in the prompted path For Eg etc
9. ed in most computers to connect peripheral devices SIP Session Initiation Protocol An IETF standard for setting up sessions between or more clients It is currently the leading signaling protocol for Voice over IP gradually replacing H 323 u law Also known as mu law is the PCM quasi logarithmic curve It is the 64 Kbps standard North America voice amplitude sample used for encoding decoding VoIP Voice over IP Technology used for transmitting voice traffic over a data network using the Internet Protocol Version 1 0 Page 11
10. ison devel zlib zlib devel openssl openssl devel gnutls devel flex Version 1 0 Page 5 Transcoding Card CT200E User Manual Asterisk compilation amp Installation For using Asterisk for your application follow the steps below Download Asterisk version 1 4 43 Expand the downloaded file compile and install wget http downloads asterisk org pub telephony asterisk re leases asterisk 1 4 43 tar gz tar zxvf asterisk 1 4 43 tar gz cd asterisk 1 4 43 configure make make install make samples Se Se SE OE HE Allo Transcoding Card Installation 1 Download the driver from allo web site depend on the OS architecture http www allo com firmware transcoding allo transco 64bit driver tar 2 Copy the driver to usr src 3 the file tar xvf allo transco 64bit driver tar 4 Change the directory to allotc and run network install this will install Broadcom driver tg3 and once the installation is over reboot the machine to make the eth1 interface UP Note In some machines transcoding card eth interface may show as eth1 or eth2 depend upon the number of network cards present in the server Allo Transcoding card can be identified with MAC id 00 17 F7 XX XX XX 5 After reboot run install sh lt asterisk source path gt from the same directory Note the asterisk source directory is not provided for ex install the process will continu
11. requires DSP functionality that are resource intensive and can affect the quality of the voice signals and may introduces latency and delay Asterisk is capable of transcoding some codecs into other codecs for the purposes of call origination or termination these transcoding in done by software and is very CPU intensive using substantial amount of CPU power This CT200E card will add transcoding capability and provides excellent voice quality and transcoding capacity without affecting latency or using up precious host CPU resources The CT200E card comes with bundled software to make the product architecture independent For example the CT200E Series cards decompress G 729a 8 0 Kbit or G 723 1 5 3 Kbit and 6 3 Kbit into u law or a law or compress u law or a law into G 729a 8 0 Kbit or G 723 1 5 3 Kbit and 6 3 Kbit The CT200E Series cards are capable of handling up to 200 transcoding resources All codecs are fully indemnified no additional licensing is required for their use Allo com Transcoding card CT200E is telephony PCle card used for various PBX software e g Asterisk FreeSWITCH etc with compatible drivers Features e Capable of doing the various codec transcoding e Suitable for PCle 1 0 slots e Provides up to 200 transcoding resources Supports G729 2723 a u law G726 G722 AMR AMR WB G722 1 HD etc will be implemented in future releases Version 1 0 Page 3 Transcoding Card CT200E User M
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