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APPENDIX A - IP COMPATIBILITY

The BRIC-Link is capable of encoding and decoding a choice of three different types of non-BRIC-Link streams: 

Standard RTP

, 

Luci Live

 and 

Zephyr Xstream

. The choice is exclusive—i.e., you must set the BRIC-Link specifically 

for the type of stream you wish to be compatible with and you will remain incompatible with the other two types 
unless you change it. This setting has no effect on normal BRIC-Link functions, which continue to operate as before.

1. 

Luci Live

 - This PDA/PC-based software allows real-time streaming over IP links. As of version 1.2, 

Luci 

Live

 includes AAC and HE-AAC in addition to the default MP2 algorithm. BRIC-Link can communicate with

 

Luci Live

 only in Luci’s AAC modes. Note: The free demo available from Luci does not incorporate the AAC 

functions; you must have a licensed and registered copy to use AAC. 
To communicate with a 

Luci Live

 device: 

•  Initial Setup

 - This will define all Standard RTP connections to be Luci Compatible 

• 

BRIC-Link

 - On the 

System Settings 

tab, open the 

Standard RTP

 

Settings

 option and choose 

RTP 

Compatibility Mode

. On the pull-down box, choose 

Luci Live

.

• 

Incoming Connections

 - 

Luci Live

 sends either an AAC or HE-AAC stream to the BRIC-Link on UDP 

port 5004. These streams will be automatically decoded. By default, a return channel of AAC 56 kb/s 
mono is returned to the 

Luci Live

 product. The return channel may be altered to any Luci-compatible 

mode in the 

Systems Setting

 section.

• 

Outgoing Connections

 - Build a profile using the 

Profile Manager

 on the BRIC-Link and select a

 

Channel Mode

 of 

Standard RTP

. Then choose a Luci-compatible encoder for the outgoing call. The 

Luci software will control what type of stream, if any, is returned to the BRIC-Link.

2. 

Zephyr Xstream

 - Xstream Firmware version 3.2.0 and higher support an “RTP Push” function that is 

compatible with BRIC-Link in some modes. BRIC-Link is not currently compatible with the Xstream’s HTTP 
and SIP streaming functions.
There are several limitations imposed by the Xstream when using the RTP Push function:

•  On the Xstream, only AAC and MP3 coding are available in this mode, and BRIC-Link is only 

compatible with the AAC mode. 

•  The Xstream uses downsampling in modes below 96 kb/s, which is not supported by BRIC-Link. 
•  In order for an Xstream to decode an BRIC-Link

 

stream, the default decoder setting must be changed 

from <Auto> to <AAC> in the codec menu of the Xstream. 

To communicate with a 

Zephyr Xstream

:

• 

Initial Setup

 - This will define all Standard RTP connections to be Xstream Compatible. 

• 

BRIC-Link

 - On the 

System Settings 

tab, open the 

Standard RTP Settings

 option and choose 

RTP 

Compatibility Mode

. On the pull-down box, select 

Zephyr Xstream

. 

• 

Incoming Connections

 - 

Zephyr Xstream

 sends an AAC stream to the BRIC-Link on UDP port 9150. 

These streams will be automatically decoded. By default, a return channel of AAC 96 kb/s mono is 
returned to the Xstream. The return channel may be altered to any Xstream-compatible mode in the 

Systems Setting

 section. 

Summary of Contents for BRIC-Link

Page 1: ...Product Manual ...

Page 2: ...rd Server 12 CrossLock 12 Additional Features 12 HTML5 12 II Diagrams and Installation 13 Rear Panel Diagram and Descriptions 13 Front Panel Diagram and Descriptions 14 Pinouts Balanced Audio 14 Pinouts AES3 14 Inputs 15 Outputs 15 Pinouts Serial Port 15 Pinouts Contact Closures 15 DIP Switch Settings 16 Reset to Factory Default 16 ...

Page 3: ...The Device Manager Program 19 Updating Firmware Using Device Manager 21 Network Recovery Mode 22 V Configuring The BRIC Link 24 Login 24 Interface Page Sections 24 Connections Tab 25 Dashboard Tab 25 Performance Tab 26 Active Connections 26 Codec Channel Field 27 CrossLock Field 27 Packet Loss Graph 28 Utilization Graph 28 CrossLock Settings 29 Profile Manager Tab 30 ...

Page 4: ...nections 35 Contact Closures 35 Switchboard Server 35 CrossLock VPN Settings 36 System Clock 36 Alternate Modes 36 Advanced System Settings 37 Security 37 Auxiliary Serial 37 CrossLock VPN Settings 38 BRIC Normal Settings 38 HTTP Settings 39 Standard RTP Settings 39 EBU3326 SIP Settings 39 TCP Settings 40 Miscellaneous 41 Vi Network Manager 42 ...

Page 5: ...5 CrossLock Connections to MultiRack 46 VIII Making Connections Via Switchboard 47 IX Making Manual Connections 49 Creating New Remotes 49 Backup Remote 50 Connecting and Disconnecting 51 Special Notes for Manual CrossLock Connections 51 X Setting Up Your Switchboard Account 52 Logging In and Setting Up Switchboard 52 Creating Users 53 Contact Lists 53 Following Contact Lists 54 Shares 55 ...

Page 6: ...ment 65 Always Connect To 65 Backup Remote 65 XiI About The Algorithms 68 AAC 68 HE AAC 68 HE AACv2 68 Linear PCM 68 FLAC 69 G 722 69 Opus 69 Algorithm Codec Profiles Chart 70 XIII Multistreaming 71 Multistreaming Arrangements 72 BRIC Link Initiates the Call 72 BRIC Link Rack Receives the Call 72 Using CrossLock with Multistream Connections 72 ...

Page 7: ...5 Decoding a Stream 76 Simultaneously Connecting BRIC Links and Streaming 76 XVI Making EBU3326 SIP Connections 77 More about EBU3326 77 EBU3326 in BRIC Link 77 EBU3326 SIP Modes 78 Unregistered Mode 78 Registered Mode 78 SIP Servers 78 SIP URIs 78 Registering with a Server 78 Making Registered SIP Calls 80 Advanced EBU3326 SIP Topics 80 SIP Troubleshooting 81 ...

Page 8: ...4 XVIII Switchboard Traversal Server Disclaimer 86 Traversal Server Disclaimer 86 XIX Conformity And Regulatory Information 87 Suppliers Declaration of Conformity 87 EC Declaration of Conformity for R TTE Directive 88 US Canada Regulatory Information 89 APPENDIX A IP Compatibility 90 APPENDIX B Unidirectional Networks 92 Standard RTP Settings 92 Decode Side Settings Only 92 ...

Page 9: ...riggered Connections 92 APPENDIX C Information For IT Managers 93 Incoming Services 93 Outgoing Services 93 APPENDIX D Connections To MultiRack 94 BRIC Normal Connections 94 Manual CrossLock Connections 94 Making Connections with Switchboard 95 ...

Page 10: ...ion is warranted by Comrex against defects in material and workmanship for one year from the date of original purchase as verified by the return of the Warranty Registration Card During the warranty period we will repair or at our option replace at no charge a product that proves to be defective provided you obtain return authorization from Comrex and return the product shipping prepaid to Comrex ...

Page 11: ...ffers a robust stereo or mono Linear mode that does not compress audio In addition unique to real time audio codecs BRIC Link offers FLAC lossless compression reducing network throughput by 30 40 with absolutely transparent coding and no tandem coding concerns For situations where further reduced bandwidth is desired BRIC Link offers AAC HE AAC modes as standard allowing superb audio quality at dr...

Page 12: ...diagnostics Use of CrossLock is optional and requires a Comrex codec running 4 x level firmware on each end of the link CrossLock connections can be made via the Comrex Switchboard function see previous section or manually For manual connections CrossLock requires extra settings to assure connections are only made within your known group of codecs 4 3 level firmware and higher also supports CrossL...

Page 13: ...ofessional level balanced analog audio or if configured AES3 stereo digital audio for output 4 Right Audio Output Delivers professional level balanced analog audio 5 Ethernet 10 100baseT Connection for network connections 6 Contact Closures Provides for 4 contact closure triggers and 4 open drain style contact clo sure outputs 7 RS 232 Provides serial data I O across the IP link Data rate is confi...

Page 14: ...hen pressed momentarily Pinouts Balanced Audio Stereo professional level connections are available on the rear panel via TRS style connectors for left and right input and output Adapters are provided to convert these connections to XLR For analog connections the jacks are wired as follows 1 Sleeve Ground 2 Tip Balanced Audio 3 Ring Balanced Audio These connectors have a fixed level where a full sc...

Page 15: ...des left and right channels are delivered to the output connectors separately In mono decoder modes mono audio is delivered to both left and right output connectors Pinouts Serial Port The Serial Port is pinned to match serial connections on older Macintosh computers so commercially available adapter cables should have the proper pinning Pin Function Direction 1 2 3 TX Data From BRIC Link 4 Ground...

Page 16: ...S3 Input Select Analog 2 Analog AES3 Output Select Analog 3 Audio Loopback Disabled 4 Level LEDs TX RX Select TX 5 Headphone out select TX RX TX 6 7 Future Use 8 Factory Reset Reset to factory default Using dip switches To factory reset your device using DIP switches follow these steps 1 Put DIP switch 8 up 2 Press the RESET button once then wait until the Left Right and Power LED flash red and gr...

Page 17: ...fault profile which won t require changes to the factory default settings This factory default profile uses the Opus mono encoder in both directions of the link LOGGING IN After determining the IP Address of the BRIC Link open any computer s web browser on the same network as BRIC Link Type the IP address in the browser URL to navigate to the BRIC Link s web interface Log in to BRIC Link with any ...

Page 18: ... SWITCHBOARD CONNECTIONS ICONS RECEIVING INCOMING CONNECTIONS By default BRIC Link is set to automatically answer incoming calls whether or not Switchboard is used to make them Incoming calls will appear in your connections list while they are active They can be disconnected locally by highlighting them and clicking Disconnect FIGURE 5 ACTIVE SWITCHBOARD CONNECTION ...

Page 19: ...e 6 device manager As shown in Figure 6 running the Device Manager and clicking the Scan button will produce a list of all Comrex devices found on the LAN If the default password has changed Device Manager will prompt for the password to BRIC Link after the scan Figure 6 shows the four tabs that appear on the right hand pane after Device Manager has logged in The fourth tab is labelled Web Configu...

Page 20: ...ter upon booting To change the Ethernet IP addressing to static select the default location at the bottom of the list and change the IP Type to static The system will prompt a list of static settings as shown in Figure 8 on the following page As can be seen in Figure 8 the static IP address the Netmask the Gateway Address and at least one DNS Server Address must be configured in the proper fields ...

Page 21: ...he unit s current firmware and the most recent version of firmware for the unit are listed at the top of the tab 1 in Figure 9 If the device isn t running the latest version of firmware click the Get Latest Version button 2 in Figure 9 and download it If the unit s Firmware is current the button will be grayed out Next select Update Device 3 in Figure 9 choose the upd file just downloaded and clic...

Page 22: ...e minutes after a BRIC Link unit has re booted Once those five minutes have elapsed the unit will need to be rebooted in order to perform network recovery Figure 10 shows Network Recovery Mode The Scan button has shown the presence of a BRIC Link on the network On the Device tab on the right pane the Network Settings button is activated and a countdown timer is started Selecting this will allow ch...

Page 23: ...23 Figure 10 network recovery mode ...

Page 24: ... SECTIONS There are two parts to the primary interface screen Figure 12 Main Audio Meter 1 This meter displays audio levels for active connections to the BRIC Link Configuration Tabs 2 The primary focus of the BRIC Link configuration interface These tabs consist of Connections Dashboard Performance Profile Manager and System Settings to control and obtain status of BRIC Link They are described in ...

Page 25: ...sh Icon option The Connections tab will display Name and Status information of a remote Comrex codec when it has initiated a connection to the BRIC Link Information from units connected this way will only appear while the connection is active By default three remotes appear on the list These remotes are used for troubleshooting connectivity and include 1 Loopback Allows for localhost testing the c...

Page 26: ...ibed in the next section PERFORMANCE TAB The Performance Tab includes information on data transmission and reception rates from BRIC Link to active remote connections This allows for real time monitoring of network quality during connections ACTIVE CONNECTIONS Clicking the header Active Connection will show a basic chart of real time codec receive performance Channel Statistics as shown in Figure ...

Page 27: ... that the system is trying to achieve based on measurements calculated over the jitter window The right side of the display shows a real time and historical representation of frame loss If the decoder does not receive packets in time the chart will show a red line indicating the percentage of lost packets over the one second interval CODEC CHANNEL FIELD Clicking on the Codec Channel field delivers...

Page 28: ...een The packet was either lost or late but was recovered either by the Forward Error Correction FEC or Automatic Repeat Query ARQ error correction built into CrossLock Figure 17 Packet loss graph UTILIZATION GRAPH Figure 18 contains a graph of the outgoing or incoming utilization of the network The bars indicate the average data rate used by the system during each one second window It is possible ...

Page 29: ...a combination of decode delay buffering and error correction to keep connections stable At the start of a CrossLock connection the sliders are in Auto Delay mode and the information on the sliders is purely for informational purposes Clicking off the Auto Delay box sets the system to Manual Delay mode and allows the slider to be moved with a mouse The entire slider is scalable and the range of it ...

Page 30: ...to determine how it connects The Profile Manager tab Figure 21 allows the definition of one or more profiles to assign to outgoing remote connections It is often unnecessary to create any new profiles since BRIC Link ships with a set of factory default profiles that cover most users This tab allows for creating custom profiles when necessary Please remember though that these profile settings only ...

Page 31: ...e moving on to other options since the choices in the subsequent sections will vary based on this choice Make sure to press Apply Changes in order to confirm each change made 1 2 3 Figure 22 Profile manager tab Profile Settings Local Remote encoders When choosing an IP based channel i e BRIC Normal users will be presented with two categories of options Local and Remote The Local Settings are used ...

Page 32: ... per Packet This function allows the encoder to wait for variable X number of frames to exist before sending a packet This option differs from FEC because each frame is only sent once Setting this value to a number higher than one can reduce network usage at the expense of delay This is because packet overhead bits like IP and UDP headers are sent less often Decoder Downmix This option controls th...

Page 33: ...experiences improved performance over this period the manager may choose to wind the buffer back down after the five minutes has passed Buffer Management On Off This is a diagnostic setting used to troubleshoot buffer manager performance by the factory For usage it should always remain on CrossLock Managed Delay There are two ways BRIC Link can calculate its target delay and therefore how much dec...

Page 34: ...which allows the error correction layer to use the same amount of bandwidth as the audio stream For example if an audio stream is consuming 80 kb s of network bandwidth and UDP Max Retransmissions is set at 50 up to 40 kb s additional network bandwidth may be used for error correction SYSTEM SETTINGS TAB The System Settings tab defines parameters that are not specific to a particular remote connec...

Page 35: ... link 24 hours a day To assign an always on remote simply pull down the menu and select which remote to designate as Always On A connection will be made and sustained to the chosen remote Remote connections must be created in the Connections tab before they can be assigned to this function Note This functionality is not supported in Switchboard Connections Show Offline Switchboard Units If enabled...

Page 36: ...andle networks with variable performance This setting is set to Yes by default Hotswap CC Indicator When enabled this setting will activate a selected contact closure when a CrossLock backup interface is configured and has become activated due to failure of the primary interface s This is set to Disabled by default Hotswap CC Unit This setting allows users to select which unit to indicate HotSwap ...

Page 37: ... categories are displayed SECURITY Remote Control This enables remote control and firmware update functionality This option may be changed in the System console only and is View Only in the Web Interface Remote Diagnostics When activated this option allows for remote diagnostics capability The default setting is Off Web Server Port This controls the port that the UI web server uses when remote con...

Page 38: ...ection on data transmitted to the remote end Header Compression Enables the compression of headers to reduce overhead especially at lower bitrates Default is set to Yes Base FEC Applies a constant base amount of FEC sufficient to recover the specified rate of packet loss Default is set to 0 STUN Server Displays IP address of the STUN Server Default is stun comrex com Always Connect Allows users to...

Page 39: ...te details please review the IP Compatibility appendix on Page 90 Accept Incoming Connections Listen for and automatically answer incoming calls Incoming Connection Profile Use this profile for incoming connections IP Port Allows users to designate an incoming network port RTP Compatibility Mode Enables compatibility with select RTP audio streaming devices Return Channel Enable Enables a return ch...

Page 40: ...call is present SIP Domain When registering with some SIP services a separate domain entry is required If this is not populated the domain of the SIP proxy entry is used SIP Auth Username When registering for some SIP services a separate Auth Username is required Do not populate unless a specifc entry is required by the provider Send RTP To Source Port A NAT Traversal function used with smartphone...

Page 41: ...about changing port numbers also apply here calls with mismatched port numbers will fail MISCELLANEOUS Meter Demo Mode This setting will put the front panel LED meters into a demonstration mode This setting is set to No by default ...

Page 42: ...P by default In this configuration BRIC Link will be assigned an IP address from a pool of available IP addresses from the network router upon booting If BRIC Link is connected to the Internet it should display connection information for the Ethernet Port including IP and DNS server addresses If it doesn t display this information confirm that the unit is connected to the Internet and that the Eth...

Page 43: ...ferent connections to different Networks known as Locations This allows for on the fly connection to different Networks by storing connection and configuration data as a Name able Location To do this select the New Location under the Network Location header Change the name of the Location to something memorable and then select IP Type Figure 27 This controls the IP address type amongst DHCP Static...

Page 44: ... to factory defaults This setting is disabled by default and Comrex advises users to be cautious when enabling it If the Ethernet parameters are set incorrectly it is possible to be locked out of the BRIC Link and you will then have to use the Device Manager program s Network Recovery Mode discussed on Page 22 in order to log into it Use With CrossLock This option allows for specifying whether thi...

Page 45: ... both the transmitting and receiving units before a connection is established Using this VPN codecs can transfer much more information than is possible on Non CrossLock legacy connections This information includes network status packet loss statistics error correction parameters media statistic information to set encoder throttle rates and information required to establish links over multiple netw...

Page 46: ...ill connect on 9002 and instance 3 will connect on 9003 These are on the MultiRack side and the remote codecs will all use their default ports of 9000 The CrossLock connection between the Comrex hardware happens over a single port 9001 but the BRIC Normal connections take place virtually on their usual legacy ports within that VPN The system will show these virtual connections happening on ports 9...

Page 47: ...a connectible codec If that gear is green the far end is available for incoming connections By selecting a Switchboard peer and clicking the edit pencil icon on the right side you can change several important aspects of the Switchboard connection 1 Use CrossLock Determine whether the connection will be made over the CrossLock Layer and port arrangement or over the legacy BRIC Normal protocol and p...

Page 48: ...r icon is green 3 Click Connect in the upper right corner Switchboard connections can be ended on either end of the link by choosing the active connection in the list and clicking Disconnect Incoming connections will appear as new entries in the Switchboard peer list while they are active They can be disconnected the same way 48 ...

Page 49: ...ion without the Switchboard server For most codecs this is the primary Ethernet MAC address of the far side codec If you are at Firmware 4 5 and newer and connecting to an ACCESS MultiRack instance you may need an additional step Add the instance number suffix as a x to the end of the unit s Switchboard ID MAC Address to designate the instance ID e g Instance 4 as 00 01 0c c0 78 12 4 The Connectio...

Page 50: ... Remote feature works in conjunction with a remote s Local Timeout parameters defined in the primary remote s profile BRIC Link can sense an IP Connection failure and will wait the defined Local Timeout parameter in the primary remote s profile If the connection is restored during this time no backup will occur If the timeout lapses without re connection to the primary remote BRIC Link will automa...

Page 51: ... programming the Switchboard ID for each unit or primary Ethernet MAC address into the outgoing settings on the codec on the opposite side of the link This process for outgoing calls is described above What isn t mentioned is also important the MAC Switchboard ID of the outgoing unit must also be programmed into the unit receiving the call Note that if connecting to an ACCESS MultiRack instances 2...

Page 52: ...s must first have an account with the server This account can be obtained by contacting Comrex at 978 784 1776 800 237 1776 or by emailing techies comrex com info comrex com Only one account is required for each group of codecs Once a user name and password are provided navigate to switchboard comrex com in a web browser When first accessing Switchboard there will be a notice stating that no units...

Page 53: ...ia the Users tab at the top of the main codec list Figure 37 This allows for the creation of accounts for users that can later be deleted Several user accounts can be created with unique passwords Figure 37 users tab Contact Lists In some situations it might not be desirable for every codec to see the Switchboard status of every other codec To help filter what s displayed on a codec s interface Sw...

Page 54: ... on how that codec is displayed on other devices FOLLOWING contact lists Each unit also has the ability to Follow a Contact List This is a view only function that allows a codec to see the status and presence of units in a Contact List All units are set to Follow the master Contact List by default Figure 39 Switchboard main screen Figure 40 Unit Screen To follow a Contact List on a codec first cli...

Page 55: ...ayed on that codec s own list It has no impact on how that codec itself is displayed on other devices Shares Switchboard users outside of an account can be granted permission see the status of others devices through the implementation of Shares which like Contact Lists are also subsets of a user s codec fleet that can be defined Other Switchboard accounts can be added via Shares allowing codecs to...

Page 56: ...r Figure 44 Figure 44 Account share An email will then be sent from the server asking the user to confirm the Share Once they ve confirmed the Share the Shared devices will appear as options in their contact list menu Please note Shares are a one way transaction For shares to work both ways with each user able to view each other s devices both users must send each other a Share invitation and then...

Page 57: ...work to recreate it To disable a Share simply click the orange Disable button on the bottom right of the Share edit page Figure 46 Figure 46 disable share MANAGING MULTIPLE CONTACT LISTS While most people will only use the default Contact List it is possible in Switchboard to create and Follow multiple Contact Lists as well as to manage them from a codec s user interface ...

Page 58: ...n the upper right Figure 48 viewing list devices While viewing the units in a list the units will be displayed and the lists themselves will temporarily disappear from the screen To view the lists again press the red Back arrow as seen in Figure 48 Please note Only Contact Lists that a codec is actively following can be viewed from that codec BULK ACTIONS FOR CONTACT LISTS It is possible in Switch...

Page 59: ...ll be impacted by the change Step 1 Choose the Action Type First select which of the four types of Bulk Actions to perform Figure 50 ADD codecs to a Contact List REMOVE codecs from a Contact List SUBSCRIBE to a Contact List i e have multiple codecs Follow that list UNSUBSCRIBE from a Contact List i e have multiple codecs stop Following that list Figure 50 bulk contact list assignment Step 2 Select...

Page 60: ...s that a Bulk Action will affect ALL of the codecs that are either part of a Contact List or are Following that list To only change a subset of the codecs in a list try creating a new Contact List with only those units in it and then perform the Bulk Action using that list Step 3 Identify the List That Will Be Changed Lastly choose the Contact List that will be affected by this Bulk Action This wi...

Page 61: ... a web server the web server can automatically derive the reply address from the request and respond to it So the traditional four segment decimal address e g 70 22 155 130 is completely obscured to the user Even if you know your IP address it s quite possible that address will change over time This is because the vast majority of Internet users establish their addresses via DHCP a protocol whereb...

Page 62: ...self the user should input a familiar name by which the codec will be known within that group Once enabled a codec in a group that is physically connected to the Internet will sync with the server The current public IP address of the codec will be obtained by the server and the user directory will be updated with the new IP address In addition the availability status of the codec is also updated T...

Page 63: ...ket In a typical codec application Codec X will send a packet from Address A Port B to Address C Port D on the Destination Codec Y A codec that has multiple applications running like streaming audio while simultaneously serving a configuration web page would deliver these applications from and to different port numbers but perhaps to the same IP address Port numbers are also used by NAT routers in...

Page 64: ...ction no NAT detected Use the hole punched by connection to the Directory Server for incoming connections from other codecs Instruct the called codec to make the connection in the reverse direction The second option which utilizes the outgoing Directory Server ping described earlier is very useful The interval of this ping is adjustable but defaults to about one minute which is short enough to kee...

Page 65: ...ful to simulate a connection oriented stream so BRIC Link uses a low bandwidth sub channel to deliver information back to the encoder about overall connection status It does this in its application layer rather than the transport layer where UDP exists By default it monitors the health of a connection and if no data is detected as received by the decoder for 60 seconds this is a user defined timeo...

Page 66: ...do not want the system to time out and disconnect in the event of network failure The BRIC Link has the capability to automatically make a backup IP connection if there is a failure in the primary connection This is called Fallback and is an option chosen after defining a new Remote connection Figure 57 Backup Remote As shown in Figure 57 highlight an existing connection this will be the primary c...

Page 67: ...ettings tab labelled Automatically fall forward If this box is checked the system will constantly attempt to reconnect the primary remote while connected to the fallback remote If connection is successful the connection to the Fallback will be terminated ...

Page 68: ...to produce AAC comparable quality at a lower bit rate It does this by encoding lower frequencies to AAC and higher frequencies using Spectral Band Replication SBR SBR is a technique that partially synthesizes these high frequencies HE AAC is trademarked by other companies as AACPlus HE AAC and close derivatives is often used as the main audio codec for digital radio and satellite networks HE AACv2...

Page 69: ...thm used in some VoIP telephones and codecs It is provided for compatibility purposes and is not considered a superior algorithm for audio codecs Opus A newer offering that combines low delay and low network utilization Opus is included primarily for compatibility with softphone apps and Internet connections using WebRTC see Technotes about WebRTC on the Comrex website Special CBR modes are offere...

Page 70: ... data rate 56 kb s 184 ms 20 kHz G5 Stereo 56Kb adds Parametric Stereo to SBR for higher quality audio at low data rate AAC LD Requires higher data rates but provides near transparent voice or music with low delay 96 kb s 30 ms 20 kHz I1 Mono 128 kb s 30 ms 20 kHz I2 Stereo 192 kb s 30 ms 20 kHz I3 Dual Mono allows independent programming to be sent on both L R channels 256 kb s 30 ms 20 kHz I4 St...

Page 71: ...hich is described in the next section Each BRIC Link can only run one decoder so it s important that in a Multistream environment a maximum of one stream is sent in the reverse direction This means that users interested in hearing a Multistream must turn off their encoders This can be a bit confusing because Multistream can be initiated from either end of the link Figure 59 Multistreaming Arrangem...

Page 72: ... with BRIC Link B first followed by C and D BRIC Link receives the call In model number 2 where the serving BRIC Link accepts all incoming connections all the profiles are built on the Remote Receivers BRIC Link B will use a simple profile by defining the encoders in each direction and assign it to BRIC Link A BRIC Link C and D will each define a profile with their Local Encoders turned Off and as...

Page 73: ... input streams when multicasting CrossLock is not supported and should be turned off for all IP Multicast connections The following section presupposes that IP Multicast users will be familiar with the basic concepts of setup and operation of the network and will thus focus on how to configure BRIC Link for Multicast mode Multicast Profiles To configure remotes for Multicast first create a profile...

Page 74: ...t connection simply define a remote as having an address within the IP Multicast Block use an IP Multicast profile and press Connect Time to Live Time to Live TTL is a variable set by Multicast encoders to determine how long a packet is processed before it is dropped by the network The default value of TTL in BRIC Link is 0 which limits its use to within a LAN environment TTL may be manually chang...

Page 75: ...s outside users to initiate a pull connection to the codec Figure 62 Accept incoming HTTP connections The default port for serving streams is UDP 8000 Creating a custom port can be done in the HTTP settings under IP Port Note that this port will need to be referenced in the URL provided to listeners Figure 63 HTTP STREAMING ENCODER Next select an encoder for use by the streaming server Figure 63 O...

Page 76: ...actual port if not changed from the default it will be 8000 In Windows Media Player input the address like this http 192 168 1 75 8000 stream asx using the actual IP address of course Simultaneously Connecting BRIC Links and Streaming BRIC Link can stream while connected to another Comrex codec in BRIC Normal mode If the BRIC connection is using an AAC algorithm supported by players then when a st...

Page 77: ...r s application it s best to stick to a single codec vendor and their proprietary protocols More about EBU3326 The Tech 3326 document defines several mandatory encoding algorithms and the transport layer that could be used on them for compatibility But the most complex part of the standard was the decision on how to arrange Session Initialization which is the handshake that takes place at the star...

Page 78: ...codecs through routers The remote codec can be dialed by its SIP URI instead of IP address The SIP server can be used to find codecs on dynamic IP addresses SIP Servers A SIP server exists in a domain This domain is represented by a web style URL like sipphone com or iptel org A SIP server or proxy generally handles IP connections within its domain SIP URIs The SIP server assigns a fixed alphanume...

Page 79: ...n Status box located on the Connections tab Figure 65 Figure 65 Sip status The status will reflect the progress of the registration process When complete this will display Online If the box does not display Online after a short time it means that registration likely failed It s best to go back and carefully check the registration info It might also be useful to ensure the registration information ...

Page 80: ...ettings and can be made visible by selecting the Advanced box IP Port Universally SIP connections are supposed to use UDP port 5060 to negotiate calls between devices and between servers and devices Note this is only the negotiation channel actual audio data is passed on the RTP ports Changing this port number will change which incoming ports are used to initiate connections and to which ports con...

Page 81: ...d return a channel to that address This is the default method Comrex devices use to create and maintain a connection But SIP includes a separate forward address or return address field and requires that a codec negotiating a call send to that address only This is important in the case of having an intermediate server and works fine as long as each codec knows its public IP address Outgoing Call Is...

Page 82: ...ned by Comrex and requesting its Public IP If this option is enabled the codec itself will handle the address switching Be aware of the battling workarounds issue as ports are being translated by the router as well as IP addresses If the ALG enabled router receives an unexpected result in the SIP address field as it might if using STUN it may not translate ports as expected and it s likely that th...

Page 83: ...small handling fee for distribution of this software ACCESS makes use of open source and or free software with the following copyright restrictions ncurses Copyright 1998 1999 2000 2001 Free Software Foundation Inc See further Copyright notice below dropbear Copyright 2002 2004 Matt Johnston Portions copyright 2004 Mihnea Stoenescu All rights reserved See further Copyright notice below libxml2 Cop...

Page 84: ...ove copyright notice this list of conditions and the following disclaimer in the documentation and or other materials provided with the distribution 3 The names of the authors may not be used to endorse or promote products derived from this software without specific prior written permission THIS SOFTWARE IS PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION T...

Page 85: ...Y OF SAME IN NO EVENT SHALL COMREX CORPORATION AND OR ITS SUPPLIERS TOTAL LIABILITY TO YOU REGARDLESS OF THE FORM OF ACTION EXCEED THE AMOUNT YOU PAID AS PART OF THE PURCHASE PRICE OF THIS PRODUCT COMREX CORPORATION AND ITS SUPPLIERS MAKE NO WARRANTY EITHER EXPRESSED OR IMPLIED THAT ANY USE OF THE PRODUCT WILL BE FREE FROM INFRINGEMENT OF PATENTS COPYRIGHTS OR ANY OTHER THIRD PARTY S INTELLECTUAL ...

Page 86: ...tioning Traversal Server deployed on the Internet Comrex has deployed and provided you account details for a Switchboard TS account on our server located at http switchboard comrex com Comrex provides this service free of charge and at will As such Comrex offers no warranty as to availability of this server or of its function Comrex reserves the right to discontinue availability of this service at...

Page 87: ...nical Requirements for Connection of Terminal Equipment To the Telephone Network July 2001 Thomas O Hartnett Vice President Comrex Corporation Note This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated ...

Page 88: ...s is in conformity with the essential requirements and other relevant requirements of the R TTE Directive 1999 5 EC This product is compliant with the following standards and other normative documents European EMC Directive 89 336 EEC EN 55022 1998 A1 2000 Class A Conducted and Radiated Emissions EN55024 1998 A1 2001 A2 2003 Immunity ITE Equipment Low Voltage Directive 2006 95 EEC EN 60950 1 2001 ...

Page 89: ...harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required But if advance notice isn t practical the telephone company will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary The telephone company may make changes in its facilities...

Page 90: ...tered to any Luci compatible mode in the Systems Setting section Outgoing Connections Build a profile using the Profile Manager on the BRIC Link and select a Channel Mode of Standard RTP Then choose a Luci compatible encoder for the outgoing call The Luci software will control what type of stream if any is returned to the BRIC Link 2 Zephyr Xstream Xstream Firmware version 3 2 0 and higher support...

Page 91: ...n choose an Xstream compatible encoder for the outgoing call The Xstream will control what type of stream if any is returned to the BRIC Link 3 Standard RTP This mode is set to receive a basic unformatted AAC stream within a standard RTP UDP structure At present this mode does not offer compatibility with other industry devices ...

Page 92: ...el Enable entry Disable the return channel and click Apply or Save on ACCESS Portable This will make sure that no channel will be set up in the direction to the encoder Encode Side Settings Only Connections of this type must be established from the encoding side of the link A new Profile must be built that uses the Standard RTP channel mode under the Profile Editor Choose an outgoing encoder along...

Page 93: ... process is password protected and requires access to TCP 80 and TCP 8081 In addition to the password protection the update data itself must have a valid cryptographic signature from Comrex or else it is rejected Incoming Services Port Service Default TCP 22 SSH Off On for products shipped before 1 July 2017 TCP 80 85 HTTP control On TCP 8081 Firmware upload Open only during upgrade process UDP 90...

Page 94: ...ramming the Switchboard ID for each unit or primary Ethernet MAC address into the outgoing settings on the codec on opposite side of the link This process for outgoing calls is described above What isn t mentioned is also important the MAC Switchboard ID of the outgoing unit must also be programmed into the unit receiving the call Note that MultiRack instances 2 5 have special Switchboard IDs cons...

Page 95: ... on Add New Unit a dialogue box will ask for the Switchboard ID Ethernet MAC address of the MultiRack When adding MultiRack to your Switchboard Account each instance must be added individually as a separate device The primary Ethernet MAC address is used here only for MultiRack instance 1 Switchboard ID Each instance must be added to Switchboard individually Instances 2 5 use the same MAC address ...

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