VBrick Systems MPEG-1, MPEG-2, MPEG-4 manual Serial Port Passthrough, How Passthrough Works

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Chapter 5

Serial Port Passthrough

Overview

Using serial port passthrough, STBs can provide full duplex, end-to-end transparent passthrough of user data from an STB to a VBrick, or to other networked devices. The STB has one serial port that can be used for passthrough. The serial port operates at its configured baud rate (e.g. 300 to 115.2 Kbps). Some common applications include remote control of a camera (pan-tilt-zoom), remote control of security doors, low speed data transport, or data collaboration between PCs. Note that passthrough mode is used to send control information from an STB to/from another device and may not support sustained data at higher data rates.

Topics in this chapter

Overview

How Passthrough Works

Using Telnet

How Passthrough Works

VBrick STBs can receive data on a particular TCP/IP port and transparently output that data to a serial port. Conversely, any data input to a serial port can be passed through to other devices connected to that TCP/IP port. Devices include VBrick appliances or special applications connected to the appropriate TCP/IP port. This feature is called "Serial Port Passthrough." The serial port is assigned port TCP 4439. A typical application is for two VBricks connected to each other's TCP/IP port 4439. In this case, characters typed into a terminal program attached to one VBrick's serial port appear on a terminal program attached to the other VBrick's serial port. In this case, the TCP/IP network serves as an intermediary between the serial ports of two VBrick appliances.

An STB is a Responder of passthrough connections. When configured as a responder it will accept up to 64 connections from initiator appliances. It is possible to Disable Passthrough Mode, so that the STB cannot respond to Passthrough requests. Since the medium used for setting up Passthrough connections is a generic TCP/IP port, any IP device that is prepared to connect to a VBrick's port can be considered as a Passthrough Initiator. The VBrick Responder appliance will not know the exact nature of the device at the other end of the port.

STB Admin Guide

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Contents EtherneTV-STB Set Top Box STB v3.7.2d Admin GuideFCC Notice About VBrick Systems CopyrightContents Serial Port Passthrough Using the Set Top BoxIndex Font Conventions OrganizationRelated Documents Overview InstallationCommand Prompt Action Type Using the Command PromptUsing pman Initial SetupSetting the IP Address Connecting to the NetworkAssigning a Static IP Address Finding the Dhcp IP AddressModel Numbers PAL ConfigurationLogin ConfigurationSaving Changes ConfigurationVideo Settings MCS Location Start ModeReceive Address Local-Fullscreen Mode with MPEG-4 Multicast Main Volume/Line 1 Volume Home Page Location/Home Page EnableLocal UI Location Lowest Bitrate for Buffer Check Rtsp StreamingData Buffering Seconds Buffer Check for UnderflowAux1-Aux8 Network SettingsOptions Panel Login Proxy Type, Http Proxy Host and PortManagement EthernetGeneral Display SettingsResolution General SettingsSerial Port System SecurityLanguage System UpdateHardware EtherneTV Media Distribution System Sample Interface in Local Mode Local ConfigurationUploading from the STB Accessing the XML Configuration FileDownloading to the STB Local Configuration XML Configuration ExamplesExample of live MPEG-4 stream with forced UDP streaming Example of MPEG-1 unicast entry with port address KeywordMp2 stream/Keyword Vod content keyword Stream Installing the Download Application System UpgradeUpgrading from v3.71 or Higher \Program Files\VBrick\ Running ETV-STBDownload Before You BeginUpgrade using the SAP Editing a Configuration File Logging Upgrade Activities Upgrading from v3.70 or Lower Using a Web Browser to Run the UpdateCreating an FTP Server with IIS Removing Lock Files Verifying the File Transfer Additional Upgrade Steps for Local ModeEtherneTV Media Distribution System How Passthrough Works Serial Port PassthroughSerial Port Pinouts Using TelnetSerial Port Passthrough EtherneTV Media Distribution System Start Mode Using the Set Top BoxLocal Mode Local Mode Local-Fullscreen ModeMCS Mode MCS Mode Using the IR RemoteVOD Using the Wireless KeyboardIcon Description Accessing the WebIcon EtherneTV Media Distribution System Index Index
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