TEJ User Manual, Ver 1.0.0
Contents
1. 1 4 7 make make install Compile and install Zaptel Copy the file zaptel 1 4 8 tar gz to the target directory opt and execute the following commands to perform compilation of the Zaptel driver cd opt tar xvf zaptel 1 4 8 tar gz cd zaptel 1 4 8 make make install Copy tejxapci 1 0 0 tar gz to the directory of zaptel 1 4 8 and execute the following commands cd opt zaptel 1 4 8 tar xvf tejxapci 1 0 0 tar gz cd tejxapci make Complete the driver compilation for the TEJ series boards Compile and install Asterisk Copy the file Asterisk 1 4 17 tar gz from the CD to the target directory of opt or some Synway TEJ Series User Manual Page 11 ynway Step 5 Step 6 other directory cd opt tar xvf Asterisk 1 4 17 tar gz cd Asterisk 1 4 17 configure make make install Complete Asterisk compilation Load the driver cd opt cd zaptel 1 4 8 modprobe zaptel cd tejxapci insmod tejxapci ko TEJMODE X Synway Information Engineering Co Ltd X 1 T1 X 2 J1 Default Setting E1 Start Asterisk Make sure all previous configurations are correct See Chapter 3 for details ztcfg vv asterisk vvvvc CLI gt zap show channels 2 6 4 Driver Uninstallation Step 1 Uninstall the driver for TEJ boards Step 2 Check if the driver uninstallation is successful Execute the command rmmod tejxapci Execute the command Ismod Check if the driver has2. i 1 1 1 1 Figure 1 4 Generation of Hybrid Echo Our TEJ boards integrate the echo cancellation capability and support an echo tail delay of up to 64ms without extra devices or modules which is unmatched by other like products 1 2 What is Asterisk Asterisk is the first Open Source PBX which is developed maintained and improved by Digium Inc It can run on Linux and other Unix platforms The name Asterisk is derived from the all inclusive wildcard symbol in UNIX as well as Linux a symbol that stands for one or more unspecified characters used especially in searching text and in selecting multiple files or directories It implies the wide applicability of this software Asterisk has become the basis for thousands of communications solutions If you need to communicate Asterisk is your answer For more information on Asterisk visit http www asterisk org or http www digium com 1 3 Asterisk as a Switch PBX Asterisk can be configured as the core of an IP or hybrid PBX switching calls managing routes enabling features and connecting callers with the outside world over IP analog POTS and digital T1 E1 connections Asterisk runs on a wide variety of operating systems including Linux Mac OS X OpenBSD FreeBSD and Sun Solaris and provides all of the features you would expect from a PBX incluing many advanced features that are often associated with high end and high cost proprietary PBXs Asterisk s architect
3. Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves m am ee ee ee ee ee ER Ee ee n ee ee ee a ae a A n n n ee ee ee E E Gef ee n n n n n n n n ee LE Af ffe ie to configure CLI gt zap show channels Chan Extension Context Language pseudo TEJtext 1 TEJtext 2 TEJtext 3 TEJtext 4 TEJtext Synway TEJ Series User Manual Synway Information Engineering Co Ltd A Sp per ch ch A ON OO OO OO OO OO OO CH oa P GA MS OO oO OO JO Qm P ON S YS YH YH YY YP wa NS TS aS TS aS a MOH Interpret default default default default default In Step 3 if zaptel conf is properly configured the printed information after it successfully starts Asterisk should be something like the following Page 16 ynway CoN OO 9 10 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext TEJtext Synway Information Engineering Co Ltd default default default default default default default default default default default default default default default default default default default default default default def
4. Synway Synway TEJ Series TEJ 1A PCl TEJ 2A PClI TEJ 4A PClI User Manual Version 1 0 0 Synway Information Engineering Co Ltd www synway net w ynway Synway Information Engineering Co Ltd Contents 070 01 1 eames se eege i Copyright Declaration ccccesseeceesseeeeeeeeeneeeeseseneesesseneeeenseeeceeseneneeessesneeeeeesseneeeenseneneeneseeoes ii Software License AGreeiMent ccseeccceeseneeeeeeeeeeseeneeeesneneeeeeeseaneeeeseeneeeeaqeeeeeeaseeneeeasesseeeaeseeenees iii Revision FISUONY ss cecsuscesscciessdecaicvesitued ecsencdciseasasecsenctueadasnanasnd csunaceriensancnsseanantensdcenddueseaanieanertitaace iv PROT ACC anaes ccc ces ee een V Chapter Be UE EE 1 1A Echo Cane llatio LEET 2 EA aT K acre aa e E ENAA EE EAEE ERARE 3 1 3 Asterisk as a Switch DX 3 1 4 Asterisk as a Gateway isss stonn aas aaa a aoaaa araa EEEE 4 1 5 Asterisk in the Call Center 4 1 6 Asterisk in the Network sss sss css ss sxs sc ss ss ess senses ono nena nann nnn nnn annan A Chapter 2 Board Installation sssssssosvsssszessvsgssgssresesogvssspgsvesssgzvsegzgvssgszeatsgcgyegsgvsszsgagarsgggvrssxssgsgss 5 ES Attention on Unpacking a sices ciersieaccnsnies deabetsaaangaves 4 eevcenecteavaveeeeaansnezns EEA CAREEN a EEEE 5 2 2 Outgoing fl Dee DEE 5 2 2 1 BOard ClASSIICATION DEE 5 2 2 2 Hardware Structure amp Board Features 5 2 3 Interface Identification oiiire raoa a an ara aaa dd 8 2 4 Slot Comp
5. Synway Information Engineering Co Ltd Revision History Version Date Comments Version 1 0 0 2008 9 Initial publication Note Only major revisions to this manual itself recorded herein Synway TEJ Series User Manual Page iv KS ynway Synway Information Engineering Co Ltd Preface Thank you for choosing the Synway AST series boards which are designed to fully support Asterisk platform This series includes four subseries Synway FXM Use of modular structure and analog lines Use of analog lines equipped with much more on board Synway FXS channels than FXM Synway TEJ Use of digital trunks E1 T1 J1 Synway CDC CODEC board Compared with other products in Synway AST series the TEJ board has high integration It is integrated with the capability of 64ms echo cancellation eliminating the need of getting supports from extra modules or devices bringing an obviously better effect of echo cancellation than other subseries in AST The Synway TEJ driver program as a link between the board hardware and Asterisk is only used to set up the Asterisk platform but not applicable to secondary development Each board model in the Synway TEJ series has its corresponding driver package which is elaborated in the following text This manual as the help file for hardware installation software installation and configuration of the Synway TEJ series aims at those installation and maintenance technicians as well as t
6. age The driver installation package includes all necessary files for installation and use of the Synway TEJ driver See below for details tejxapci 1 0 0 tar gz TEJ driver AST TEJ_UserManual doc User manual for this driver English version Introduction to installation and configuration of 3 AsteriskTFOT zip G S Asterisk official provision Synway TEJ Series User Manual Page 10 KS ynway Synway Information Engineering Co Ltd Notes 1 tejxapci 1 0 0 tar gz can only be installed with the help of the Zaptel driver and started by running Asterisk The Zaptel driver must be installed for compilation and operation of this driver This driver supports the version of zaptel 1 4 So we recommend zaptel1 1 4 8 and Asterisk 1 4 17 for your use which can be downloaded from the website www synway net or http downloads digium com pub All files within the driver installation package can be downloaded free of charge from www synway net 2 6 3 Driver Installation Note As for Zaptel driver and Asterisk platform we use zaptel 1 4 8 1 Asterisk 1 4 17 See below for driver installation procedures Step 1 Step 2 Step 3 Step 4 Login to the system users with root access only Compile and install Libpri Copy the file libpri 1 4 7 tar gz to the target directory opt and execute the following commands to perform compilation of the libpri library cd opt tar xvf libpri 1 4 7 tar gz cd libpri
7. atibility 0 ee cececce cece cece cen eaee cece reni rara aein aeaa eaa a Taa aaa a 8 2 5 Hardware INSTA AON asos Nay daaa vry rT 99 9299 x ERE 497 adaon EE d eege 7 azas 9 2 6 Software Installation 20 cccccccccce cece cece cece ee ee eee e eee EEE EE EERE EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE SEES EERE EERE EERE EEE 10 2 6 1 System Requirements sees eee ee eee eee eee 10 2 6 2 Installation Package see 10 2 6 3 DiiVOr INSLAN ALON eessen E REEERE R OOREEN ER EEAS EEES 11 2 6 4 Driver Uninstallation EE 12 Chapter 3 Configuration ccsseeeeeecssneeeeeesneneenesseneeeenseneeeeesnenneessneneeeesssneneesesenensesesneneeseseeoes 13 R EH 13 Be KDD L ct ceaeed asa vesih aetann cvcidins yasdennnge E E E E eereease 14 3 3 Configuration Testing sese eee eee eee 15 Chapter 4 FAQ siiiccs setscsscssceceasasnseteasansccsceasatcesateanes caeasdccasdassvactasetuesivedsasiesasadeudisasaasdersaadsectesencacs 18 Appendix A Technical Specifications sss sees esssssee cesses sse ecce ees esse sere enn neee enner enner 19 Appendix B Techniical SaleS Support csesssseeeesesees sse ves seee essere essere serene ereenn enrere 20 Synway TEJ Series User Manual Page i KS ynway Synway Information Engineering Co Ltd Copyright Declaration This manual is provided by Synway Information Engineering Co Ltd hereinafter referred to as Synway as the support file for Synway TEJ Series board driver software Both the software and this manual a
8. ault default default default If zaptel conf is improperly configured the system will prompt that this command does not exist after you enter zap into the command line Regarding the configurations of SIP and other information go to the following websites to refer to Asterisk s description http www asteriskdocs org modules news http www voip info org wiki index php page Asteriskt configtfiles Synway TEJ Series User Manual Page 17 KS ynway Synway Information Engineering Co Ltd Chapter 4 FAQ Here we provide answers to some problems that may occur when using the Synway AST series boards 1 In certain Linux system the following information may appear upon compilation of tejxapci Warning zt_unregister usr src zaptel 1 4 8 tejxapci tejxapci ko undefined Warning zt_register usr src zaptel 1 4 8 tejxapci tejxapci ko undefined Warning zt_receive usr src zaptel 1 4 8 tejxapci tejxapci ko undefined Warning zt_transmit usr src zaptel 1 4 8 tejxapci tejxapci ko undefined Warning zt_hooksig usr src zaptel 1 4 8 tejxapci tejxapci ko undefined Solution This can be resolved by modifying two files Makefile and zaptel sysconfig under the main directory of zaptel Step1 Find out the line below in the file Makefile SUBDIR_MODULES wct4xxp wctc4xxp xpp wctdm24xxp wcte12xp Then add tejxapci to the end of this line Step2 Add anew line as follows to the fi
9. been successfully uninstalled If successful the item tejxapci will not be shown in the execution result Synway TEJ Series User Manual Page 12 KS ynway Synway Information Engineering Co Ltd Chapter 3 Configuration This chapter cites a simple configuration instance to explain how to configure Asterisk platform to meet individual application requirements Once getting familiar with this instance you are able to compile this configuration file for some goals you want 3 1 E1 etc zaptel conf loadzone us defaultzone us span 1 1 0 ccs hdb3 span 2 0 0 ccs hdb3 span 3 0 0 ccs hdb3 span 4 0 0 ccs hdb3 bchan 1 15 17 31 dchan 16 bchan 32 46 48 62 dchan 47 bchan 63 77 79 93 dchan 78 bchan 94 108 110 124 dchan 109 etc asterisk zapata conf channels context exampletest switchtype national group 1 signalling pri_net ISDNNET channel gt 1 15 17 31 group 2 signalling pri_net ISNDNET channel gt 32 46 48 62 group 3 signalling pri_net ISDNNET channel gt 63 77 79 93 Synway TEJ Series User Manual Page 13 KS ynway Synway Information Engineering Co Ltd group 4 signalling pri_net ISNDNET channel gt 94 108 110 124 etc asterisk extensions conf exampletest exten gt 1000 1 Dial zap g1 50 exten gt 1000 n playback hello world exten gt 1000 n Hangup The above configuration is for 4 E1 ISNDNET and extensions conf only configures such a circumstance of dia
10. he salesmen who are using the TEJ boards to set up Asterisk application systems This document consists of the following chapters Chapter 1 introduces the Asterisk application model and scenario set up by the Synway TEJ series boards and tells what is Asterisk Chapter 2 describes the on board jacks as well as the slot compatibility and then tells how to install boards on PC by examples Chapter 3 elaborates the board configuration Appendix A gives the technical specifications for all TEJ board models available now Appendix B shows the contact way of technical support and sales department in Synway Although Synway has scrupulously checked through this manual but cannot guarantee the absence of errors and omissions We sincerely apologize for any consequent inconvenience brought to you and will be very grateful if you kindly give your advice regarding amendments to this book Synway TEJ Series User Manual Page v KS ynway Synway Information Engineering Co Ltd Chapter 1 Overview The Synway TEJ series hereinafter referred to as TEJ are high performance cost effective digital telephony interface boards and support E1 T1 and J1 environments The environments are selectable on a per board basis via software configuration The TEJ boards improve I O speed by using DMA technique for data reading and writing on the basis of PCI bus resulting in reduced CPU usage and increased board density per server They provide the powe
11. inquiry regarding our products We shall do our best to help you However our technicians and salesmen are mainly responsible for maintaining our boards and providing relative technical support If there are problems about Asterisk please keep touch with Digium Inc for help Headquarters Synway Information Engineering Co Ltd http www synway net 9F Synway D amp R Center No 3756 Nanhuan Road Binjiang District Hangzhou P R China 310053 Tel 86 571 88860561 Fax 86 571 88850923 Technical Support Tel 86 571 88864579 Mobile 86 13735549651 Email techsupport sanhuid com Email techsupport synway net MSN scycindy_sh hotmail com Sales Department Tel 86 571 88860561 Tel 86 571 88864579 Fax 86 571 88850923 Email sales synway net Synway TEJ Series User Manual Page 20
12. le zaptel sysconfig MODULES MODULES tejxapci Synway TEJ Series User Manual Page 18 Synway Synway Information Engineering Co Ltd Appendix A Technical Specifications Dimensions 160x107mm excluding L bracket Weight 100g Environment Operating temperature 0 C 55 C Storage temperature 20 C 75 C Humidity 10 90 non condensing Storage humidity 10 90 non condensing Input output Interface Digital trunk interface TEJ 1A PCI 1 RJ48C jack TEJ 2A PCI 2 RJ48C jacks TEJ 4A PCI 4 RJ48C jacks E1 interface Compliant with G 703 including 75Q unbalanced interface and 1200 balanced interface T1 J1 interface DSX 1 and CSU line build outs available for different extents of signal losses including 100Q and 110Q balanced interfaces Synway TEJ Series User Manual Audio Specifications CODEC CCITT A u Law 64kbps Distortion lt 3 Frequency response 300 3400Hz 3dB Signal to noise ratio 238dB Echo suppression 240dB Maximum System Capacity Depends on the system consumption of Asterisk and the processing capability of computer Power Requirements 3 3V DC 1000MA Maximum power consumption lt 5W Audio Encoding amp Decoding A Law 64kbps Law 64kbps Sampling Rate 8kHz Safety Lightning resistance Level 4 Page 19 Synway Synway Information Engineering Co Ltd Appendix B Technical Sales Support Thank you for choosing Synway Please contact us should you have any
13. ling 1000 to connect with the first E1 3 2 T1 J1 etc zaptel conf loadzone us defaultzone us span 1 1 0 esf b8zs span 2 0 0 esf b8zs span 3 0 0 esf b8zs span 4 0 0 esf b8zs bchan 1 23 dchan 24 bchan 25 47 dchan 48 bchan 49 71 dchan 72 bchan 73 95 dchan 96 etc asterisk zapata conf channels context exampletest switchtype national group 1 signalling pri_net ISDNNET channel gt 1 23 Synway TEJ Series User Manual Page 14 KS ynway Synway Information Engineering Co Ltd group 2 signalling pri_net ISNDNET channel gt 25 47 group 3 signalling pri_net ISDNNET channel gt 49 71 group 4 signalling pri_net ISNDNET channel gt 73 95 etc asterisk extensions conf exampletest exten gt 1000 1 Dial zap g1 50 exten gt 1000 n playback hello world exten gt 1000 n Hangup The above configuration is for 4 T1 J1 ISNDNET and extensions conf only configures such a circumstance of dialing 1000 to connect with the first T1 J1 3 3 Configuration Testing Step 1 Enter the following command to configure the board ztcfg vv Step 2 Enter the following command to connect Asterisk asterisk vvwvvc Step 3 Check the state of channel connection upon a successful start CLI gt zap show channels Notes In Step 1 if zaptel conf is properly configured the printed information displayed after you enter the command ztcfg vv should be something like the following Zap
14. npacking When you unpack the board please check if it is damaged or corrupted during transportation In case of any loss take your bill of documents and contact the seller or dial the phone number listed in Appendix B to consult Note Only the trained and qualified service people are allowed to reinstall the board Users had better not do it by themselves 2 2 Outgoing Inspection 2 2 1 Board Classification All board models in the TEJ series are listed in the table below PCI 2 2 TEJ 1A PCl 1 universal PCI interface TEJ PCI 2 2 TEJ 2A PCl 2 universal PCI interfaces TEJ PCI 2 2 TEJ 4A PCl 4 universal PCI interfaces Table 2 1 Board Models in TEJ 2 2 2 Hardware Structure amp Board Features Figure 2 1 TEJ 1A PCI Left and Front Views Synway TEJ Series User Manual Page 5 Synway Synway Information Engineering Co Ltd Figure 2 3 TEJ 4A PCI Left and Front Views Notes As shown in the above figures PCMO PCMS3 respectively indicate the 4 trunk interfaces while LED1 LED4 represent their synchronization indicators INm and OUTm refer to the grounding jumpers respectively at the receiving and transmitting ends for PCM m 1 m 1 4 Synway TEJ Series User Manual Page 6 e Synway Synway Information Engineering Co Ltd TEJS 1A PCL XXXXXX Figure 2 4 TEJ 1A PCI Rear View See below for characteristic features of TEJ boards 1 PCI 2 2 Bus Support Includes PCI 2 2 bus with b
15. r to interconnect traditional telephony systems with emerging Voice over IP VoIP technologies The TEJ driver which is compatible and must be used with the Zaptel driver can smoothly and seamlessly support Asterisk system When using the TEJ board to establish Asterisk platform all that you should do is configure and operate the Asterisk platform without the need for secondary development See Figure 1 1 below for the set up of the Asterisk application system with the TEJ board TEJ xxx xxx represents the existing and future board models in the TEJ series Figure 1 1 TEJ Driver Set up The excellent combination of the TEJ driver and the Asterisk platform brings the following features to the TEJ series boards Supported Data Modes Cisco HDLC HDLC PPP Multi link PPP Frame Relay Supported Voice Modes B PRI CPE and PRI NET NI1 Nl2 EurolSDN 4ESS AT amp T 5ESS Lucent DMS100 B E amp M Wink Feature Group B Featrue Group D B FXO and FXS Ground Start Loop Start Loop Start with Disconnect Detect Synway TEJ Series User Manual Page 1 KS ynway Synway Information Engineering Co Ltd The TEJ series connect Asterisk Server with PSTN Channel Bank or PBX via T1 or E1 interface The boards and the corresponding drivers can be used to establish a professional telephony network environment Figure 1 2 and Figure 13 below are typical application models with TEJ Asterisk Se
16. ration of various line conditions this series boards are equipped with two groups of grounding jumpers on each channel which respectively control the groundings of the transmitting and receiving ends In case the 75QE1 unbalanced coaxial cable is used the grounding jumpers at the receiving end should be disconnected while those at the transmitting end should be short circuited provided that the PC is properly grounded This configuration is the factory default setting and applicable to most situations so that there is usually no need to change it If it is difficult to ground the local PC you may short circuit the on board grounding jumper at the receiving end and use the transmitting end at the opposite terminal for grounding If the receiving end at the opposite terminal is grounded improper operation the on board grounding jumper at the transmitting end must be disconnected Refer to Table 2 3 for details Generally speaking even in the case of proper grounding at both terminals only the external layer of the E1 coaxial cable at the transmitting end is allowed to be grounded The grounding of both transmitting and receiving ends may result in a current loop with ground wires bringing instability to signals Therefore such grounding must be strictly avoided Opposite Transmit End grounded grounded non grounded non grounded Terminal Local z Receive End non grounded grounded non grounded grounded Terminal Transmit End sho
17. rd are used ata same time When to use which interface depends on the installed modules and their particular positions on the board All TEJ series boards adopt 8 pin RJ48C jack See below for the pin layout of RJ48C Pin Wee RRing RTip Not used TRing TTip Not used Pin1 Pin8 Not used COIN ID lO A lG IM Not used Table 2 2 RJ48C 2 4 Slot Compatibility Make sure it compatible with PCI slots when using a TEJ board Users may choose whichever suitable according to the slot patterns illustrated in Figure 2 5 below Slots 0 SE ee C0 eee 2 C WO d 9 Figure 2 5 Board with PCI Slot Slot Number 0 AGP Pro Slot 1 64 bit 5 0V PCI Slot 2 64 bit 3 3V PCI Slot Synway TEJ Series User Manual Page 8 Ke ynway Synway Information Engineering Co Ltd 3 32 bit 5 0V PCI Slot 4 PCI E Slot The TEJ 1A PCI TEJ 2A PCI and TEJ 4A PCI boards include PCI 2 2 bus and support 3 3V 5V PCI slots That is they support the slots numbered 1 2 and 3 in Figure 2 5 but don t support the slot numbered 0 AGP slot The available PNP plug and play feature eliminates the need for jumper leads 2 5 Hardware Installation Note Always turn off the power before installation Step 1 Configure the grounding jumper Disconnect all grounding jumpers in the use of 1000T1 110QJ1 or 120QE1 balanced twisted pair cable In conside
18. re copyrighted and protected by the laws of the People s Republic of China All rights reserved no part of this manual may be extracted modified copied reproduced or transmitted in any form or by any means electronic or mechanical without prior written permission from Synway By using this manual you agree to the following Software License Agreement Synway reserves the right to revise this manual without prior note Please contact Synway for the latest version of this manual before placing an order Synway has made every effort to ensure the accuracy of this manual but does not guarantee the absence of errors Moreover Synway assumes no responsibility in obtaining permission and authorization of any third party patent copyright or product involved in relation to the use of this manual Note Asterisk and Digium mentioned in this book are registered trademarks of Digium Inc Synway TEJ Series User Manual Page ii Synway Synway Information Engineering Co Ltd Software License Agreement Synway Information Engineering Co Ltd hereinafter referred to as Synway owns the copyright of this software and its accessories relative files and archives hereinafter referred to as this product Any company or person can download the corresponding driver software and other useful documents for free directly from our website after purchasing a board of Synway Synway TEJ Series User Manual Page iii w ynway
19. rt circuited disconnected short circuited disconnected PC grounded Receive End disconnected disconnected short circuited short circuited Transmit End short circuited short circuited manage to short circuited PC not grounded make the PC Receive End short circuited disconnected grounded short circuited Table 2 3 Configuration of Grounding Jumpers for Use of 75QE1 Unbalanced Coaxial Cable Synway TEJ Series User Manual Page 9 KS ynway Synway Information Engineering Co Ltd Step 2 Properly fit the board onto the PC chassis It is suggested to fix the L brackets on the board with screws before going to the next step Step 3 Connect to digital trunks Each board provides 1 4 RJ48C jacks each of which can either connect directly with digital trunks or convert to 2 BNC connectors via an RJ48C to BNC adapter See Figure 2 6 below Figure 2 6 RJ48C to BNC Adapter Step4 Set up an application environment Connect digital trunks with the on board RJ48C jacks to establish an application environment Step5 Boot your computer and install the driver Regarding driver installation refer to Section 2 6 for details 2 6 Software Installation 2 6 1 System Requirements Host System Requirements CPU 800MHz Intel Pentium lll or above Memory 64M or more HD Depends on individual requirements Supported Operating Systems v Linux Debian Fedora Rad Hat 2 6 2 Installation Pack
20. rver Remote offices Figure 1 2 Application Model Traditional Telephony System Figure 1 3 Application Model II VoIP Telephony System Note XXX in Figure 1 2 and Figure 1 3 represents the existing and future board models in the TEJ series 1 1 Echo Cancellation Two sources of echo have primary relevance in telephony hybrid echo and acoustic echo Hybrid echo is a linear electrical signal reflection that occurs at the 4 wire to 2 wire conversion point in a PSTN network Hybrid echo can enter the VoIP network wherever there is a connection between VoIP and PSTN networks Acoustic echo is non linear and is caused by poor acoustic isolation between the speaker and the microphone of a user s device e g handset headset softphone speakerphone It can enter the VoIP network from any source Both forms of echo become more noticeable and annoying to the caller with the added delay especially longer that 30ms of the IP network In fact the added VolIP induced delay can make what would formerly be considered minor echo annoying enough to cause users to abandon the call Synway TEJ Series User Manual Page 2 KS ynway Synway Information Engineering Co Ltd Hybrid echo is the primary source of echo Most echo cancellers are designed mainly to eliminate hybrid echoes Here below illustrates the generation of hybrid echo 4 wire 2 wire transmission Hybrid subscriber network line 1 U I U U U U U I U U U U 1
21. tel Version 1 4 8 Echo Canceller MG2 Configuration SPAN 1 CCS HDB3 Build out 0 db CSU 0 133 feet DSX 1 Channel map Synway TEJ Series User Manual Page 15 ynway Channel 01 Channel 02 Channel 03 Channel 04 Channel 05 Channel 06 Channel 07 Channel 08 Channel 09 Channel 10 Channel 11 Clear channel Channel 12 Channel 13 Channel 14 Channel 15 Channel 16 Channel 17 Channel 18 Channel 19 Channel 20 Channel 21 Channel 22 Channel 23 Channel 24 Channel 25 Channel 26 Channel 27 Channel 28 Channel 29 Channel 30 Channel 31 31 channels Slaves Slaves Slaves Slaves Slaves Slaves Slaves Slaves Slaves Slaves Slaves Clear channel Clear channel Clear channel Clear channel Clear channel Clear channel Clear channel Clear channel Clear channel Clear channel Default Default Default Default Default Default Default Default Default Default Default Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves D channel Default Slaves 16 Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves Clear channel Default Slaves
22. ure is designed for maximum flexibility and supports Voice over IP in many protocols and can interoperate with almost all standards based telephony equipment using relatively inexpensive hardware Synway TEJ Series User Manual Page 3 ynway Synway Information Engineering Co Ltd 1 4 Asterisk as a Gateway It can also be built out as the heart of a media gateway bridging the legacy PSTN to the expanding world of IP telephony Asterisk s modular architecture allows it to convert between a wide range of communications protocols and media codecs 1 5 Asterisk in the Call Center Asterisk has been adopted by call centers around the world based on its flexibility Call center and contact center developers have built complete ACD systems based on Asterisk Asterisk has also added new life to existing call center solutions by adding remote IP agent capabilities advanced skills based routing predictive and bulk dialing and more 1 6 Asterisk in the Network Internet Telephony Service Providers ITSPs competitive local exchange carriers CLECS and even first tier incumbents have discovered the power of open source communications with Asterisk Feature servers hosted services clusters voicemail systems pre paid calling solutions all based on Asterisk have helped reduce costs and enabled flexibility Synway TEJ Series User Manual Page 4 Synway R Synway Information Engineering Co Ltd Chapter 2 Board Installation 2 1 Attention on U
23. urst data transmission rate up to 132 MB s PNP plug and play feature eliminates the need for jumper leads universal PCI design supports 3 3V 5V PCI slot DMA Read and Write The use of PCl based DMA technique for data reading and writing helps minimize the cost of the host CPU Compatible with Asterisk Entirely compatible with Asterisk at the hardware driver level with all source codes open RJ48C Jack TEJ 1A PCl TEJ 2A PCI and TEJ 4A PCI boards respectively have 1 2 and 4 RJ48C jacks which can either connect directly with digital trunks or convert to BNC connectors via a proper adapter making connection easy and malfunctions rare Echo Cancellation The self adaptive echo cancellation feature gives the board the capability of 64ms echo cancellation so as to effectively eliminate echoes under various conditions canceling out the effect of voice playback on DTMF and busy tones detection avoiding self excited oscillation and howling and minimizing the possibility of registering wrong DTMF and busy tones in a conference call designed especially for VolP application environments Voice CODEC Support Supports A law law codecs Synway TEJ Series User Manual Page 7 Synway R Synway Information Engineering Co Ltd 2 3 Interface Identification It s quite important to recognize different kinds of interfaces as such information is necessary for configuration of Asterisk platform In real practice not all interfaces on the boa
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