User Manual
Table Of Contents
- 1: Introduction/Overview
- 1.1 Documentation notes
- 1.2 Important safety note
- 1.3 Product introduction
- 1.4 General product handling and operation
- 1.4.1 Protection from water and dust ingress
- 1.4.2 Powering on/off and sleep mode
- 1.4.3 Attaching, detaching, and handling modules
- 1.4.4 Attaching the strap
- 1.4.5 About the touchscreen display
- 1.4.6 Selecting the active interface
- 1.4.7 Running a function or test
- 1.4.8 Repeating a function or test
- 1.4.9 Screen title bar buttons/icons
- 1.4.10 Capturing a screen image (screenshot)
- 1.4.11 Stopping a test
- 1.4.12 Saving results
- 1.4.13 Maximum test duration for continuous tests
- 1.4.14 Interpreting results
- 1.4.15 Important MoCA module compatibility note
- 1.5 Remote control of the unit
- 1.6 Licensed feature details
- 1.7 Maintenance
- 1.8 FTP information
- 1.9 Technical support
- 2: Wi-Fi Testing Menu
- 3: 10/100/1G Testing Menu
- 4: System Menu
- 4.1 Record Manager
- 4.2 Admin Port
- 4.3 Set Date and Time
- 4.4 Sync with PC
- 4.5 Version Info
- 4.6 Battery Status
- 4.7 Download IPTV Channel Guide
- 4.8 Cal Touchscreen
- 4.9 Licensed Options
- 4.10 Update Firmware
- 4.11 System/Module Settings
- 4.11.1 System/Module Settings > Base Unit
- 4.11.2 System/Module Settings > RF Video Module
- 4.11.3 System/Module Settings > ADSL/VDSL2 Module
- 4.11.4 System/Module Settings > Combined Module Default
- 4.11.5 System/Module Settings > MoCA Module
- 4.11.6 System/Module Settings > DOCSIS Module
- 4.11.7 System/Module Settings > CSM Module
- 4.11.8 System/Module Settings > MoCA-RF Module
- 4.11.9 System/Module Settings > Wi-Fi
- 4.12 Taskforce
- 4.13 Signature Capture
- 4.14 Language Selection
- 4.15 Help and Support
- 5: IP and Video Testing
- 5.1 IP Network Setup
- 5.2 Connection Info
- 5.3 Ping
- 5.4 Traceroute
- 5.5 Web Browser
- 5.6 Packet Loss Test
- 5.7 Throughput
- 5.8 Speedtest
- 5.9 IP Video testing
- 5.9.1 Video QoS (Quality of Service)
- 5.9.2 Change Channel
- 5.9.3 Channel Guide Settings
- 6: Specifications
Tech-X Flex
®
(P5) Verizon Base Unit User Guide Rev B PRELIMINARY 3/20/2014
5-35
Intro
Wi-Fi
10/100
System
IP/Video
Specs
About IP multicast
IP multicast is a set of protocols that allows a single IP packet to be sent to multiple hosts (that is, “group
members”) without the need to send multiple redundant copies of the same packet from the source. It
serves to alleviate network congestion when multiple hosts need to receive the same traffic, such as the
case where multiple IPTV subscribers are watching the same channel and each will ultimately receive
the exact same data payload.
Consider the following diagram, which represents a small network without multicasting:
Figure 5-15 Hypothetical network without group multicasting
In the previous figure, three subscribers are watching the same channel. The shaded packets represent
the unicast IP streams required to deliver the service. The IP payload in each stream, however, is exactly
the same, resulting in a redundancy that creates congestion and scalability issues.
Alternatively, consider the following figure, which illustrates group multicasting:
R2
R3
R1
R4
R5