User Manual
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1. S Link S unLink endMP3Stream Data Size etRS232SendBuffer Index Data endRS232 Length ReadRS232Data Events HeadStreamReady Channel bVideo Data Size DataStreamReady Channel bVideo VSerNumber Key Data Size n OO lt lt TO lt lt D dp On 5 NI 3 NO oS 7 oS 3 3 5 Z O D D D O D O erverDown FrameDrop Channel ReceiveRS232String Data Size ReceiveRS232Binary Length MotionDetected Channel How to Set IP Address for IVS 255 The IP address of IVS 255 has its factory setting as 192 168 0 218 To set a new IP please follow the instructions below Step 1 Connect a crossover RS232 cable to COM1 of IVS 255 and the other side to a PC s COM port Crossover RS232 Cable Step 2 Execute HyperTerminal on PC Step 3 Under HyperTerminal the COM port setting is 115200 8 n 1 No flow control Step 4 Press Connection button on HyperTerminal and then press Enter key for several times The HyperTerminal shall look like this Emma 198255 login 0909000 1VS 255 15255 login t SEMI ANTA Ferrio gi Step 5 Login root then press Enter key Step 6 Use the command IPSetup to set up new IP address for IVS 255 x USB COH EREM CHO HE WAO FUCO ED HAN O 58 loginl871 root login on ttv50 roote1Y5255 root IPSetup s 192 168 0 1 255 255 255 0 192 168 6 Set new Static IP as following PADDR 12. IP interval 32 5 IP interval 64 6 7 Response packet format for linking request server to client This response packet is received by a client at LocalPort defined in previous linking request The packet format is LinkResult e 4 bytes ple 1 bytes gt ServerlP The server IP address 4 Byte LinkResult 1 Byte 0x00 Client Link successfully AV LocalPort is not 0 or client is free for link AV LocalPort 0 OxFF AlreadyLinkedByCurrentClient OxFE AlreadyLinkedByOtherClient OxFD Error_WrongVideoMode AV_LocalPort is not 0 OxFC Error WrongFrameRate AV LocalPort is not 0 OxFB Error WrongGuantization AV LocalPort is not 0 OxFA Error WrongVideolPinterval AV LocalPort is not 0 15 Server Port 8002 To receive operating reguest from a Client The server receives all operation reguests at this port Only after server is linked this port became active otherwise no action is taken nor data responded to The server replies to the client at client LocalPort specified in previous linking reguest Request format client to server Request_ID Data 4 1 bytes p Reguest ID Reguested Function 1 JGhecking current configuration 0 byte 2 Watch Dog Clear 0 byte 3 JConfiguration change request 5 bytes 4 Serverresetreguest 0 byte 5 lUnlink request 0 byte Checking current configuration To check the current configuration send a request with ID 1 The server replies with the curr
3. properties and methods Property SavedFileName avi EnableAudioPlay Open Source Close PutHeader bVideo Data Size PutData bVideo VSerNumber Key Data Size 4 2 MPSEncoderCtrl This ActiveX control is used to encode audio input into MP3 frames The sample rate is 44 1kHz bit rate is 128 Kbps and mono channel It also enumerates all possible audio input sources for the user s selection Being an ActiveX control it supports the following property methods and event Property AudiolnputSource Mp3EncodeStart Mp3EncodeStop StreamReady Data Size 22 4 3 VSLinkCtrl This ActiveX control is used to Define Server IP addresses and the client local ports LocalPort and AV LocalPort for receiving UDP sockets from the server Send encoded Mp3 frame data to the IVS 255 Receive MP4 Video stream and ADPCM Audio stream data from the IVS 255 Monitor the status of the IVS 255 Control and Configure the IVS 255 Reset the IVS 255 Send data to RS232 COM2 Receiving data that input to RS232 COM2 of IVS 255 gt gt gt gt gt gt Being an ActiveX control it supports the following properties methods and events Properties IP Address LocalPort AV LocalPort ServerReady Video Mode Video 0 Enable Video 1 Enable Video 2 Enable Video 3 Enable Audio 0 Enable Audio 1 Enable Audio 2 Enable Audio 3 Enable VideoFrameRate ideoQuantization ideolPInterval itRate MDSense
4. streaming Audio compression type ADPCM Sample Rate 44 1 KHz Mono Number of Channels 1 js Connector DB9 male Operation temperature 15 C 65 C Storage temperature AOC 85 C EMI CE FCC VCCI 1 4 Mechanical Dimemsion 290 9 00 1000 5 Em s000 0 SOOD a E 1000 62 19 JEJER PACTADO shob b r oo ooeat et trusi JA OOO E t a Oa a DA G7 mi E i gi Eirini Eie a a Do OO MORON Chapter 2 Hardware Installation 2 1 Front and Rear Panel Overview 0 12 DON 4 10 11 12 13 1 MOEG CH1 CH4 BMC connectors 8 WOT LED Network status LED 4NTSc PAL video signal inputs Network has activities Blinking orange Network idle Constant slow blinking orange 2 AUDIO CH1 CH4 BNC connectors 4 audio signal inputs 9 POV VER Switch Device omoti Switch 3 AUDIO OUT BMC Connector 1 audio signal output 10 12 DC IM Power cord socket 4 DC power input specification with 12 DE 1 04 4 LAN t RJ45 Connector Ethemet 10400 Base T 11 20M1 DCE OSUB 9 pin Male Connector COM is built for the purpose to connect with PC 5 Metwork LED System Console Device Power On Constant green 12 COM DCE SUB pin Male Connector 6 Network Connection LED COM ts built for the purpose to connect with PC Network Link connected Constant orange System Console r POWER LED 145 RESET Device Power On Constant green Reboot 145 255 2 2 Connection Example Camera a i 2 Tran D w
5. 92 168 6 1 NETHASK 255 259 250 6 GATEWAY 192 168 6 254 Please Confirm if the setting is correct nly NOTE The setting will become valid after rebooting rootG1YS255 root s de 00 12 07 ANSIW 115200 8 N 1 25
6. ActiveX Controls Three Windows ActiveX controls are available for the user to develop his client AP These 3 controls implement socket protocols defined in the UDP Packet Format section Because it is the server AP that implement these protocols the IVS 255 must run the original server AP provided with the IVS 255 3 2 UDP Packet Format This section describes packet contents used for communication between client PC and the IVS 255 The communication between client and server uses UDP sockets Every IVS 255 has a unique IP address and the client must know its IP in order to allocate the IVS 255 Communications with different purposes use different socket port E Client needs at least 3 ports gt 15 port used to send UDP packet to server port 8000 8002 gt 2 port AV_LocalPort used to receive MP4 video and ADPCM audio stream data from server gt 3 port LocapPort used to receive other response data from server mM Server uses 5 ports gt Port 8000 used to receive MP3 stream data from client that is linked to it gt Port 8001 used to receive a linking request from any client gt Port 8002 used to receive all other requests from client that is linked to it gt Port 8003 used to send MP4 video and ADPCM audio stream data to client that is linked to it Port 8004 used to send response data to a client V Server Port 8000 To receive MP3 Frame Data from a client The IVS 255 uses socket port 8000 to receive MP3 f
7. IVS 255 Real time MPEG4 Industrial Video Server User Manual Version 1 0 0 IVS 255 User Manual Rev 1 0 0 Mar 20 2006 The information in this document is subject to change without prior notice in order to improve reliability design and function and does not represent a commitment on the part of the manufacturer In no event will the manufacturer be liable for direct indirect special incidental or consequential damages arising out of the use or inability to use the product or documentation even if advised of the possibility of such damages This document contains proprietary information protected by copyright All rights are reserved No part of this manual may be reproduced by any mechanical electronic or other means in any form without prior written permission of the manufacturer Revision Date oseon OOOO Contents Chapter 1 General Introduction nnennnnannnnnnnm 5 ll Product Features se cian aitama k iki ilmalik k sin la ahne kli 5 MOC Ue leida seine canteen E E E 7 1 45 SPECI CALLOUS er A a onice daam aaa 8 1 4 Mechanteal DI AE MIS TON amme aaa than aktant matata 8 Chapter 2 Hardware Installation enneennnannnnnes 9 2 1 Front and Rear Panel Ov er view 4 scscscdcxsa ie tan asmatadkaaama aasa alatine anu a 9 22 OnE CON EIM C eo a E R 10 2 9 lnstallanon EEOESAUTES sant aralt inn ANA viki 10 Chapter 3 SOM WANG nirien 11 3 1 PREC MICS C inina Inna iano deawni
8. The default setting of COM2 is 9600 n 8 1 Client IVS 255 PTZ Camera TCP port 8100 Ethernet 1 the Client user sends string data to IVS 255 s Ethernet at port 8100 TCP 2 the VS server get the string data from Ethernet 39 VS server outlet this string data to RS232 port the COM2 3 4 Receiving data from RS232 This section describes a function that allows client user to get string data that input to IVS 255 s RS232 COM2 port The default setting of COM2 is 9600 n 8 1 Client IVS 255 TCP port 18100 String Data String Data RS 232 Ethernet 15 the VS server read RS232 COM2 every 100ms to check if string data input 2 the VS server get the string data from RS232 COM2 39 the VS server sends string data to Client via port 8100 TCP Note Only the Client who linked to IVS 255 can get this string data For further information Please refer to IVS 255 Client Site ActiveX Control Programming Guide 21 Chapter 4 ActiveX Controls The IVS 255 is shipped with three ActiveX Controls to support user s AP development on the client site They are ViewerCtrl MP3EncoderCtrl and VSLinkGtrl ViewerCtrl Used to play AV streams from IVS 255 MP3EncoderCtrl Used to compress Audio input into MP3 frames VSLinkCtrl Supports linking to IVS 255 4 1 ViewerCtrl This ActiveX control is used to play compressed AV stream data on the client side Being an ActiveX control it supports the following
9. ent configurations to the client Data content Empty Watch Dog Clear When a server receives a Watch Dog Clear request it replies to the client Once a server is linked by a particular client the client must keep sending this request port every second If a server doesn t receive any packet at this port after more than 5 seconds a hardware reset occurs using WDT Data content Empty Configuration change request When a server receives a Configuration change request it replies to the client Data CH_Enable VideoMode IP_Interval 1 bytes na 1 bytes 1 bytes l 1 bytes A H ERABe or the channel enable disable setting refer to previous sections for value definition VideoMode For the video mode setting refer to previous sections for value definition 16 FrameRate For the video frame rate setting refer to previous sections for value definition Quantization Quant value 1 31 1 Byte P_Interval For the video IP interval setting refer to previous sections for value definition Server reset request When a server receives a Server reset request it resets itself immediately without a reply Data content Empty Unlink reguest When a server receives a unlink request it will stop sending stream and return to free state that could allow other client to link on it The server will not send a reply to originally linked client Data content Empty The response packet
10. format server to client pn 4 bytes le 1 bytes gt ServerlP The server IP address 4 Byte Reguest ID Replying current configuration 5 bytes Replying Watch Dog Clear Result of Configuration change reguest 1 bytes Replying current configuration When the server receives a current configuration checking request it replies to the client Data Contents a 1 bytes ple 1 bytes gt lt 1 bytes 1 bytes l 1 bytes CH Enable For channel enable disable setting refer to previous sections for value definition FrameMode For the video mode setting refer to previous sections for value definition FrameRate For the video frame rate setting refer to previous sections for value definition Quantization Quant value 1 31 1 Byte P_Interval For the video IP interval setting Please refer to previous sections for value definition ii Watch Dog Clear Replay When a server receives a Watch Dog Clear request it replies to the client Data Contents Empty Result of Configuration Change Request When a server receives a Configuration Change Request it replies to the client Packet Content Result 1 Byte 1 bytes m 0x00 Configuration Changed successfully OxFE AlreadyLinkedByOtherClient OxFD Error WrongVideoMode AV_LocalPort is not 0 OxFC Error WrongFrameRate AV LocalPort is not 0 OxFB Error WrongGuantization AV LocalPort is not 0 OxFA Error WrongVideolPinterva
11. inGiteaaceudwuelindind inde eeu siilesedeaetegicieteaiedat 11 3 2 UDP Packe POU ab annae aata ae amm ld teste ioe T ela 12 Server Port 8000 To receive MP3 Frame Data from a client enreennnnnenenneennnnenennne 12 Server Port 8001 To receive linking request from a client 0 0 cee ccccccceeeeeeeeecaeeceeeeeeeeeeeeeeeeaeeeeeeaaaess 14 Server Port 8002 To receive operating request from a Client nnieennennennnanennnanen naa 16 Receiving MP4 Video and ADPCM Audio Stream from IVS 255 nmuernnnnnnnnnrnneneennnnneeneena 19 3 0 Sdn data ORS 2525 atasiade ncn cingntotredeuiensabudied case Pad dusndeaCiunenuusstawsdenuecscbesastedeusind 21 34 Receive data TOM R92 92 kenetaaaatitsa esteetikat mitu aatal ta 21 Chapter 4 ActiveX Controls enrnsnnnnennnnnnnnnnnnnen 22 AN 804153 E 0s cl EMAEMA ET E ee E on PT ea en Toe Pe at 22 12 ME COS Ms aata nam aia aim ee eee 22 AANS EKC UU KONDASE t 23 How to Set IP Address for IVS 255 nnnnnnnnnnnnnnnnnnn ama 25 What vou received After receiving the package of IVS 255 please unpack it and check if the following items are included IVS 255 Real time MPEG4 Industrial Video Server Software CD DC 12V power adaptor Audio output Cable The software CD includes client site SDK and manuals The DC 12V power adaptor accepts power input from AC 100 220 V 50 60HZ Client Server Definit
12. ion IVS 255 follows client server structure Throughout this manual the terms client and server will refer to client PC and IVS 255 respectively IVS 255 Ethernet Client Client Side Hardware PC Server Side Hardware IVS 255 CPU Xscale OS Windows 2000 XP OS Embedded Linux Chapter 1 General Introduction The IVS 255 is a high performance standalone video server based on Intel xScale pxa 255 CPU 400Mhz and embedded Linux OS It could simultaneously perform 4Ch real time MPEG4 video encoding 4 CH ADPCM Audio encoding 1 CH Audio play out and then transmit Audio Video stream data out through Ethernet The rugged hardware design low power consumption and fan less features make this product especially suitable for industrial field application 1 1 Product Features CPU Intel xScale PXA 255 CPU 400 MHz OS Embedded Linux 2 4 19 Low power consumption no fan inside Hardware watch dog protection mechanism Support 4 CH MPEG4 video and 4 CH audio real time encoding Support 1 CH real time audio out ActiveX Control SDK for AP developing Ready for integration with InduSoft Web Studio Support 4 Channel MPEG4 Video Encoding a VA lt a IVS 255 receives video signals from standard NTSC or PAL Ss gt U gt CCD camera and encodes them into MPEG4 stream The aan ad 2 encoding is performed by dedicate ASIC so it is real time When using CIF 320 240 or 352 288 mode IVS 255 could suppo
13. l AV LocalPort is not 0 18 Receiving MP4 Video and ADPCM Audio Stream from IVS 255 The server sends out an MP4 Video and ADPCM Audio data stream to the client s AV LocalPort which is told to server in the linking reguest The pocket data contents are described as following e 1 bytes 1 bytes gt 2 bytes MajorType 1 byte Indicates the major type of packet data There are two major types m SP MEDIA 0xA0 packet data is header information m SP DATA 0xD0 packet data is stream data When SP MEDIA major type is received PutHeader method in ViewerCtrl should be called to place header information When SP DATA major type is received PutData method in ViewerCtrl should be called to place stream data MinorType 1 byte Indicates the following packet data is Video or Audio For SP_MEDIA major type the MinorType defines that H MinorType MEDIA VIDEO 0x01 packet data is Video header information H MinorlType MEDIA AUDIO 0x02 packet data is Audio header information For SP_Data major type the MinorType defines that E MinorType MEDIA VIDEO 0x01 packet data is Mp4 Video frame data H MinorType MEDIA AUDIO 0x02 packet data is ADPCM Audio frame data Length 2 byte ldentifies the length of Data not including MajorType MinorType and Length itself In byte unit The Data contains header or stream data of compressed Mp4 Video or ADPCM Audio Refer to the following table for data con
14. nt AV local port number to tell server which client port to send AV stream data m If AV LocalPort 0 server will treat this request as linking status checking only no actual linking action processed m If AV_LocalPort is not 0 server will process the linking request CH Enable bit operation 0 for disable 1 for Enable 1 Byte H bit 0 Video Channel 0 Enable Disable bit 1 Video Channel 1 Enable Disable bit 2 Video Channel 2 Enable Disable bit 3 Video Channel 3 Enable Disable bit 4 Audio Channel 0 Enable Disable bit 5 Audio Channel 1 Enable Disable bit 6 Audio Channel 2 Enable Disable bit 7 Audio Channel 3 Enable Disable eoMode 1 Byte 0 NTSC Cif 320 240 1 NTSC Full 640 480 2 PAL CCIF 352 288 3 PAL Full 702 576 i Vi Q Note The VideoMode byte does more than video mode setting It also carries Motion detection sensitivity information Bit 0 1 Video Mode Bit 2 7 MD sensitivity value Value 0 000000XX extremely sensitive Value 40 101000XX default MD sensitivity Value 63 111111XX no MD 1 15 NTSC 12 5 PAL frame sec 2 7 5 NTSC 6 25 PAL frame sec 3 3 75 NTSC 3 125 PAL frame sec 4 1 875 NTSC 1 5625 PAL frame sec 5 0 9375 NTSC 0 78125 PAL frame sec Quantization Quant value 1 31 1 Byte IP Interval 1 Byte 0 IP interval 2 IP interval 128 IP interval 256 1 IP interval 4 2 IP interval 8 3 IP interval 16 4
15. o use PTZ camera IVS 255 provides a S RS 232 port to sending PTZ commands Since the PTZ protocol 4 is different from one maker to the other IVS 255 didn t define any PTZ command inside but providing a set of RS 232 send receive software functions These functions are part of software SDK OCXS Hardware Watch Dog Design on PXA 255 IVS 255 makes use of hardware WDT function of its CPU The working theory is that client must periodically send WDT signal to IVS 255 If not the IVS 255 will reboot itself and restore to initial statue to waiting connection from client This mechanism can protect IVS 255 from mal function due to communication error or any other un expected conditions Embedded Linux The software inside IVS 255 is based on embedded Linux The kernel version is 2 4 19 and root file system is jffs2 For advanced user who knows Linux very well can design his own AP inside 1 2 Product Pictures IVS 255 Front View IVS 255 Rear View 1 3 Specifications CPU _ Intel xScale PXA 255 400 MHz400 MHz Memory SDRAM 32 MB Flash 16 MB Reguire power input 12 V DC Ethernet Number of Channels 1 Power Consumption 5W smerne Bit Rate 10 100 Mbps Number of Channels 4 Input video type NTSC PAL Compression type MPEG4 ISO IEC 14496 2 SOP LEVEL3 Performance NTSC 320x240 120fps PAL 352x288 100fps Number of Channels 4 Number of Channels 1 Sample Rate 8 KHz Mono Audio stream format MP3
16. onverting analog Video and Audio signals into MPEG4 and ADPCM stream data and sending it to clients via Ethernet To achieve this the IVS 255 implement not only hardware but also layers of software This section is devoted to an introduction to the software layers of the IVS 255 Client AP IVS 255 Ethernet Client Bootloader this layer of software is closest to the hardware It helps to 1 Setup SDRAM and PXA255 registers 2 Activate and configure all ICs on IVS 255 3 Load the OS kernel and File system into SDRAM 4 Pass execution to the OS Please refer to the bootloader section for further information Embedded Linux OS kernel Driver and File system IVS 255 uses a 2 4 19 Linux kernel Please refer to the embedded Linux section for further information Server AP The IVS 255 is equipped with a server AP This AP realizes the socket protocols defined in later sections so that the user can design his client AP based on these protocols Please refer to the UDP Packet Format section for detailed information The source code of the server AP is also provided for advanced users to develop their own AP In this case the IVS 255 s originally defined socket protocols become invalid and the user may define his own protocol Of course the ActiveX controls provide together with IVS 255 is 11 useless if use define a different socket protocol UDP socket protocols Define the communication between client and server using the UDP socket
17. or OT D FOHES Camera Note The camera in this graph is equipped with microphone so it can send audio signal to IVS 255 2 3 Installation Procedures step 1 Ensure AEM ICS is in power off state Step 2 Connect AEM ICS to the network hub or switch using standard Ethernet network cable CAT5 terminated with RJ 45 connectors at both ends Use crossover cable to connect directly from a PC Step 3 AEM ICS supports up to four NTSC PAL video sources Connect the video output of each camera using standard coaxial cable terminated with a BNC connector to CH1 CH2 CH3 and CH4 of video input Step 4 AEM ICS supports up to four audio sources Connect the audio output of each camera or microphone using standard coaxial cable terminated with a BNC connector to CH1 CH2 CH3 and CH4 of audio input Step 5 AEM ICS supports one audio output Connect a speaker standard coaxial cable terminated with a BNC connector to AUDIO OUT Step 6 Ensure the power supply adapter matches the specification input AC 110V or 220V output DC 9V 1A before connecting the power supply to AEM ICS power cord socket Step 7 Turn on the power switch on AEM ICS check the Power LED green Network LED green and Network Connection LED orange are constant lit The WDT LED orange displaying link status should constantly blink 10 Chapter 3 Software 3 1 Architecture In most cases the IVS 255 serves as a server which provides the service of c
18. rames from a client The packet data contents are described as following MP3 frame la 2 bytes gt lq 4 bytes gt Frame_SerialNumber 2 byte 0x0000 OxFFFF 12 Every next frame increases the SerialNumber by 1 After OxFFFF the next frame takes 0x0000 as its serial number Frame_Header 32 bit Frame_Header contains standard MP3 Frame Header Each frame has its own header Frame_Data These are compressed MP3 audio data 4180r 417 bytes Programmers are responsible for the following issues gt Every 26 ms a new frame packet arrives at the server gt The client must link to the server before it starts to send MP3 frame packet gt Unexpected problems may occur if a client sends a frame packet to a server that is linked by another client 13 Server Port 8001 To receive linking reguest from a client Linking request is sent to the IVS 255 at port 8001 Any client can send a linking reguest packet to the server whether the server is linked or not and the server must reply to the client at the client s port So the client can also use this port to test whether a server exists and or if a server is free to link The linking request packet format client to server A of ad Client IP LocalPort AV LocalPort CH Enable VideoMode IP Interval oe Client local poi number to tell server which client port to send all UDP packets except AV stream data AV_LocalPort Clie
19. rt up to 4 cameras and produce 4 independent streams If one ot the 4 channels needs full VGA or D1 solution the other 3 will be turn off The switching between 4 CIF and 1 D1 is on the fly That means user could make switching without reboot IVS 255 2 Support Bi directional Audio IVS 255 provides bi directional audio function For audio input it receives up to 4 analog audio input signals and encodes them into ADPCM streams The 4 channels devote to 4 video input channels individually So if some video channel is disabled the corresponding audio also becomes inactive For audio output function IVS 255 receives the MP3 like stream from remote client via Ethernet Then it decodes and renders it The audio stream from client is generated by client ocx provided by IVS 255 SDK IVS 255 supports one channel audio output Streaming on Ethernet IVS 255 generates video and audio stream and transmits them to client via Ethernet with UDP protocol The using of UDP has some reasons First UDP is faster then TCP thus has better real time performance than TCP Second UDP y consume lower CPU resource then TCP _ Ethernet To delivery multimedia streaming on Ethernet is a 1 complicated effort It needs to take care a lot of jobs such as buffering packaging and un packaging frame losing detection etc Fortunately IVS 255 and its client side SDK software already did these jobs For those who want t
20. tents 19 MajorType MinorType Data Byte 0 3 in Data SampleRate 4 Byte MEDIA AUDIO Byte 4 7 in Data BitRate 4 Byte Byte 8 in Data ChannelMode 1 byte always 2 for ADPCM Byte 0 in Data Current Frame Number 1 byte Byte 1 in Data Current packet count for current frame number 1 byte Byte 2 in Data Total packet count for current frame number 1 byte Bit 4 7 of Byte 3 in Data Channel Number 4 bits Bit O 3 of Byte 3 in Data Video Key Frame 4 bits MEDIA _VIDEO Note the Video Key Frame tells more than Key frame information It also carries Motion detection information Bit 0 1 of byte 3 in data Video Key Frame SP DATA Bit 2 7 MD information g Value 0 XXXX00XX No Motion detected Value 1 XXXX01XX Motion detected Byte 4 Compressed Mp4 Video data Length 4 byte Byte 0 in Data FrameWidth 2 byte MEDIA VIDEO Byte 2 in Data FrameHeight 2 byte Byte 4 in Data 30 FramePerSecond 1 byte SP_MEDIA Byte 0 in Data Current Frame Number 4 byte Byte 1 in Data Current packet count for current frame number 1 byte Byte 2 in Data Total packet count for current frame number 1 byte Bit 4 7 of Byte 3 in Data Channel Number 4 bits Bit 0 3 of Byte 3 in Data Reserved Byte 4 Compressed ADPCM Audio data Length 4 byte MEDIA_AUDIO 20 3 3 Sending data to RS232 This section describes a function that allows client user to output data to IVS 255 s RS232 COM2 port
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