Comrex ACCESS 2USB Product Manual Download Page 105 | Manualshive

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RemoTes LIsTed FRom sWITChboaRd

Switchboard is a free service that Comrex provides. If you do not have an account set up with us, please contact us
at [email protected] or 978.764.1776 / 1.800.237.1776. To learn more about Switchboard and why you should
be using it, visit the section

Swichboard Traversal Server (TS) on page 59

.

Comrex highly recommends that you utilize our Switchboard server in conjunction with your audio codecs. When
your audio codecs have been added to your Switchboard account and placed in a contact list, those codecs will
populate automatically in the device’s Remotes list once it is powered up and registered with Switchboard. This
makes connections for broadcasts quick and easy.

Units that are added from your Switchboard contact list will show up in the Remotes list with a grey background as
shown above.

CoNNeCTINg aNd dIsCoNNeCTINg To RemoTes

To connect and disconnect remotes, select the device in the remotes list and select the

Connect

button to establish

a connection or the

Disconnect

button to disconnect the connection.

Incoming connections are displayed by their IP address, or, if also configured as outgoing connections, by their
names. Incoming POTS connections are displayed as “incoming”.

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Summary of Contents for ACCESS 2USB

Page 1: ...Product Manual ...

Page 2: ...SB Remote Broadcast 18 IV Introduction to crosslock 20 V Introduction to switchboard 21 VI navigating the touchscreen display 22 Top And Bottom Navigation Bars 22 VII network Menu 24 Manage Networks 24 configure networks 24 Add Network 25 enable and disable devices 25 Delete devices 26 configure menu tabs 27 Configuring 3G 4G Data Modems 30 Configuring the ethernet port 30 December 2017 4 0 ...

Page 3: ...chboard 34 Connecting and disconnecting to remotes 35 add new remote 36 Edit Remotes 37 Delete Remotes 37 IX STATS menu 38 X CONFIGURe menu 40 Audio controls 41 Mixer Audio 42 User Interface Configuration menu 43 XI Profiles Menu 44 Viewing Profile details 44 Default Profile 45 XII System Settings menu 46 Connection Settings 46 Contact Closures Settings 48 ...

Page 4: ...uts Audio 53 Pinouts Serial Port 53 Pinouts Contact Closures 54 XIV ABOUT THE ALGORITHMS 55 OPUS 55 LINEAR PCM 55 FLAC 55 G 711 56 G 722 56 AAC 56 HE AAC 56 HE AACV2 56 AAC LD 56 AAC ELD 56 XV Swichboard Traversal Server TS 59 Configuring Switchboard 59 Logging In And Setting Up Switchboard 59 Creating Users 61 Contact Lists 62 ...

Page 5: ...ts 73 Delay Slider 74 XVII Device Manager 76 Using Device Manager 76 XVIII ToolBox 79 LoCatIons 80 Configuring Wi Fi 80 Advanced Network settIngs in toolbox 82 XIX Making non CrossLock connections in Firmware 4 0 83 XX Operating ACCESS IN A 24 7 Environment 84 Setting ACCESS For 24 7 Operation 85 XXI Making EBU 3326 SIP Compatible Connections 87 More About EBU 3326 87 EBU 3326 in ACCESS 87 EBU 332...

Page 6: ...all Issues 91 Incoming Call Issues 91 Solutions 92 STUNning Success 92 Fix of Last Resort 92 XXII MULTI STREAMING 93 XXIII IP MULTICAST 95 Multicast Profiles 95 Setting Up A Multicast Remote 96 Time To Live 96 Changing Port Numbers For Multicast 97 XXIV Legacy Stats 98 Channel Stats 98 PEER STATS 99 XXV STREAMING SERVER FUNCTION 101 Decoding A HTTP Stream 101 ...

Page 7: ... disconnecting to remotes 105 add new remote 106 Edit Remotes 108 Delete Remotes 108 XXVIII Web Based INTERFACE Statistics Menus 109 XXIX Web Based INTERFACE Profiles Menu 110 Viewing Profile details 110 Default Profile 111 XXX Web based INTERFACE system settings Menu 112 Global Settings 112 Switchboard Server 113 Contact Closures Settings 114 Aux Serial Settings 115 Security Settings 116 BRIC Nor...

Page 8: ...XXXIII POTS PLAIN OLD TELEPHONE SERVICE CODEC CONNECTIONS 123 POTS Codec Set Up For ACCESS Compatibility 123 Using ACCESS With POTS 123 Rate Vs Retrain 124 TROUBLESHOOTING POTS CONNECTION 125 XXXIV Advanced Settings 126 Advanced Network settIngs 126 ADVANCED remote SETTINGS 127 Profile settings 128 Local Remote Settings 130 ADVANCED PROFILE SETTINGS 131 Advanced System Settings 134 Auxiliary Seria...

Page 9: ...ng connection problems with ACCESS 147 Q How can I optimize settings for EVDO UMTS or other wireless access 147 Q My IT guy is concerned about security and wants to know what services are open on this box 148 Q I notice in the Advanced Options that I can change my streaming from UDP to TCP Should I 148 XXXVI Appendix A IP Compatibility 149 XXXVII appendix B Information for IT Managers 151 Incoming...

Page 10: ...unction 153 XL APPENDIX E SPECIFICATIONS 155 CONNECTIONS 155 AUDIO SPECIFICATIONS 155 POWER 155 PHYSICAL 155 XLI Comrex Switchboard Traversal Server Use 156 XLII LICENSE AND WARRANTY DISCLOSURES FOR COMREX ACCESS 157 LICENSES 157 WARRANTY 158 XLIII CONFORMITY INFORMATION 160 EC DECLARATION OF CONFORMITY FOR R TTE DIRECTIVE 161 ...

Page 11: ...eresting locations Unpacking and Checking Contents The following items are shipped with a new ACCESS 2USB Portable 1 ACCESS 2USB Portable Stereo BRIC IP Codec 2 Lithium Ion battery pack 3 Touch screen stylus 4 USB POTS Modem 5 Edimax Wi Fi USB Adapter 6 AC Power adapter with cord 7 Manual on CD 8 Printed QuickStart Guide 9 Warranty card Please take a few moments to fill out and return the warranty...

Page 12: ...gh technology BRIC hardware delivers audio over the public internet in much the same way that ISDN and POTS codecs have done in the past BRIC consists of three elements 1 ACCESS Rackmount Designed for installation in a radio station s remote rack and configured to be always on 2 ACCESS 2USB Portable Engineered to be as easy to use as possible on the road It combines small size battery power and cl...

Page 13: ... and make it effective at navigating bad networks and avoiding networks that are beyond repair CrossLock can also signal encoders to throttle down their data rate if necessary This reduces quality but maintains higher reliability The overall result of CrossLock s function means a higher level of reliability for remotes This goes a long way towards eliminating the frustration of dropouts and other ...

Page 14: ...an ACCESS Rackmount view and edit settings and monitor connections 2 STYLUS Used on the 2USB display for navigating and selecting options in the user interface 3 BACKLIGHT KEY Controls operation of the display light a Hold for one second to enable power saving mode which turns the LCD backlight off after ten seconds In this mode pressing the button again will turn the light on for another ten seco...

Page 15: ...ugh the Audio Controls menu 2 MIC LINE SWITCH This switch determines whether the Mono In jack is configured to receive a microphone level 70 to 40 dBu or line level 10 to 4 dBu audio input 3 MONO IN control knob Use this knob to adjust the level of Mono In audio the XLR input that you are sending back to the studio To adjust press the knob in to extend make adjustments and then push back in 4 LOCA...

Page 16: ...of a serial cable to facilitate ancillary data transfer See Pinouts Serial Port on page 53 for details 3 CONTACT CLOSURES This 9 pin mini DIN jack is used for contact closure input and outputs See Pinouts Audio on page 53 for details 4 CHARGE INDICATOR Indicates the battery charging state Red Charging Green Fully Charged 5 10 100BASET ETHERNET For connection to wired IP networks Next to the Ethern...

Page 17: ...ecode in stereo and mono modes it s important to understand how the audio inputs and outputs are handled in each mode Inputs ACCESS 2USB Portable Mono In is always delivered to both the left and right encoder inputs in stereo encoder modes In mono encoder modes the left channel of the stereo line input is delivered to the mono encoder Outputs In stereo decoder modes left and right channels are del...

Page 18: ...e HEADPHONE OUTPUT The Verizon adapter is plugged into the top USB port The battery is attached to the bottom of the 2USB MONO IN MIC LINE MONO IN LOCAL RETURN OUTPUT STEREO LINE IN LINE OUT MOBILE IN OUT OUT MIC Cable Headphones Verizon 4G Adapter With the device powered on verify internet connectivity with the Verizon modem On the 2USB display a closed chain link on the bottom of the screen repr...

Page 19: ...reen Your unit will now connect to the rackmount at the studio Once finished select Disconnect at the bottom of the screen Audio level meters for both the local and return remote audio are in the bottom right of the display Adjustments can be made on the audio levels being sent to the studio and on your headphones using the knobs on the top of the 2USB To adjust push the knob of the level you want...

Page 20: ...n the endpoints including information about network quality and far end delay settings This provides for much better delay management on both ends of the link One or both ends of a CrossLock connection can utilize multiple network interfaces This can take the form of two Ethernet connections or any mix of wired and wireless networks A common usage scenario would be attaching two 3G 4G modems to AC...

Page 21: ...ting up and utilizing Switchboard with your codecs If you do not have an account contact us at info comrex com or 978 784 1776 1 800 237 1776 When codecs are turned on and have network connectivity they open a channel to the switchboard comrex com server and provide the current public IP address connection status firmware revision and the type of router if any that exists in the link Switchboard r...

Page 22: ...onfigure Create profiles for outgoing connections manage how incoming connections are treated and change configurations of additional features like audio controls CrossLock settings contact closures and incoming password security The bottom bar contains the following Pickboard Allows use of the pop up keyboard for text entry Chat Jumps immediately to the chat screen pickboard allowing text messagi...

Page 23: ...USB with network connectivity We do not recommend utilizing more than 2 networks at a time since it will cause the system to lag Even if you have more than 2 wireless networks being utilized it will still only show 2 on the bottom navigation Top Bottom Tip The touchscreen may be locked by pressing the Backlight key along with F2 A warning message will be displayed when attempting to use the unit w...

Page 24: ...d to one of the USB ports Once a compatible device is connected into one of the USB ports an icon will appear on the Manage Networks screen Devices can be individually enabled and configured via this interface At first only the Ethernet port is available for enabling and configuration configure networks The following section will go over the basic configuration for the Ethernet port the provided W...

Page 25: ...the Enable button towards the bottom right To disable select the entry in the list and tap the Disable button When an accessory network device is disabled it means that it is put into its low power state if applicable TIP To change the name of the device entry so you can easily identify a device from the Manage Networks menu select the device select the Configure button navigate to the Settings ta...

Page 26: ...ed out This is when you can utilize the Delete Network menu option To delete a device select it in the list remember it must be removed from the device and navigate to Network Delete Network Note The Ethernet port entry does not behave the same as other device entries It does not grey out and it can not be deleted ...

Page 27: ...ays be three tabs Status Settings and Locations If configuring the WLAN Adaptor Wi Fi there will also be a Scan tab Configuring WLAN adapter Wi Fi Insert a supported USB Wi Fi adapter such as an Edimax EW 7811UAC Go to Network Manage Networks and select the appropriate WLAN Adapter entry ...

Page 28: ...a list of the local hotspots Select your desired hotspot and press the Create Location button You will now be directed to the Locations tab Tip Locations are entries you can save so that you can easily select and apply network configurations at different corresponding locations If the connection requires a password select the Key parameter and press the Edit button near the bottom of the screen ...

Page 29: ... Bureau to help easily identify the network to connect to depending on which location they are physically at Select the Settings tab and confirm that the Active Network Location is pointing towards the intended hotspot name or is set to Automatic If it is not select the Active Network Location parameter and press the Edit button Press the drop down list and select the appropriate location Press Sa...

Page 30: ...re the first time you plug it into the 2USB Configuring the ethernet port The following will be covering network topics and will be presented with the assumption that the reader has basic understanding on general networking and IP addressing The default network connection is via a standard 10 100baseT Ethernet jack ACCESS 2USB contains an embedded computer with a Linux based operating system and a...

Page 31: ...g type selected then you will need to contact your IT department to help troubleshoot your network Tip DHCP addresses change over time so you may need to recheck the address if you are having trouble connecting Static addressing Static IPs are IP addresses that your Internet Service Provider ISP or IT department provides that can be assigned to a network device The device will always have that add...

Page 32: ...SB is perfectly capable of working over most LANs However if a LAN is heavily firewalled subject to overloaded traffic conditions or has security concerns better performance is possible if ACCESS has its own Internet connection Often it s worth the trouble to install a DSL line specifically for ACCESS especially if the cost is reasonable Since there may be bandwidth firewall and security concerns ...

Page 33: ...in many hotels Our testing shows a high success rate in using this browser to get through these introductory pages However it may not be optimal for general purpose web surfing It is not possible to end a browser session This is intentional Typically closing the browser can end your session with a Wi Fi provider and stop audio data flow The browser will close when the unit is powered down Even whe...

Page 34: ...t case delay in which a single ACCESS encodes and decodes the same audio in a loopback configuration the send and receive portions are connected together Comrex Lab Voice and Comrex Lab Music are codecs you can connect to for testing your unit These test lines are located at the Comrex headquarters in Devens Massachusetts Remotes Listed from Switchboard Switchboard is a free service that Comrex pr...

Page 35: ...tion Yellow means busy and red means offline TIP Depending on how your network is set up it is possible that a red gear icon will appear next to remotes that you still may be able to connect to This false red gear can be generated when multiple NATs are within your network chain that may individually hinder the ability to reach Switchboard but are able to connect when routed through the entire net...

Page 36: ...ual Private Network created by CrossLock increases connection reliability in most circumstances Unless you know of a specific reason that your setup might not support CrossLock we suggest enabling it To learn about more about CrossLock see the section CrossLock Details on page 69 CrossLock connections that don t use Switchboard can be complex to set up This is because the hardware on each end must...

Page 37: ...ection Optionally you may add a password to this outgoing remote for connection authentication In this case the incoming ACCESS must also be programmed with the matching incoming password which is assignable under Configure System Settings Connections Incoming Connection Password Finally you may specify how the unit is to behave when connection is lost to this remote To learn more about setting ba...

Page 38: ...tion regarding the decoder buffer manager s functions such as call duration transmit and receive delays frame loss rates overhead and more For more information on Channel Stats and Peer Stats go to the Legacy Stats on page 98 CrossLock Stats allows you to see CrossLock in action You can determine how many networks are being utilized the delay associated with both ends of the connection loss and re...

Page 39: ...39 Audio Levels allow you to monitor levels of both the local and remote audio during an active connection Available in dBu and dbFs scales ...

Page 40: ...menu on page 46 to learn more CrossLock Settings Adjusts CrossLock parameters See the section CrossLock Details on page 69 to learn more User Interface Adjusts F2 key behavior web browser home URL and enables restricted user mode Additional Configuration Two options appear under here Calibrate Touchscreen and Reset Configuration Calibrate Touchscreen Calibrates the touchscreen through on screen pr...

Page 41: ...rmation on Manage Profiles System Settings or CrossLock Settings go to the corresponding sections listed on the previous page Audio controls This section allows you to determine how audio is routed through the system Some of these settings affect the operation of the main ACCESS 2USB while others affect the operation of the optional clip on mixer ...

Page 42: ... feeds are being sent to the fixed level Line Out jack Audio being generated locally Local Audio being sent from the far end connection Return or a mixture of both Mixer Audio The following settings apply to the optional ACCESS clip on mixer Apply phantom power to mic inputs When selected this function applies a 12V phantom power signal to the mixer Input XLRs when Mic Line switch is in the Mic po...

Page 43: ...ction The Web Browser Home URL setting allows you to change the default homepage for the web browser ACCESS has many administrative features that are often unnecessary for the casual user Checking the Restricted User Mode allows you to hide options that would confuse non technical users When this mode is enabled users can only connect and disconnect calls enable and disable available networks and ...

Page 44: ...es with a series of profiles that are optimized for the majority of IP and POTS connections Many users may never need to define their own profiles When using ACCESS the point where the connection originates controls all available connection parameters in both directions Keep in mind that these profiles are useful only for connections initiated from the local ACCESS Incoming connections are defined...

Page 45: ...down menu To build a new profile select Add New and a new profile appears on the list labelled New Profile Select it and press Edit and you ll see a list of options IMPORTANT Building a profile doesn t change how any remotes connect until that profile is assigned to a remote Default Profile When a new remote is created a default profile is assigned unless a different profile is selected from the d...

Page 46: ...raged to name their codecs here The default name of a codec is the unique MAC address of the Ethernet port When this is changed to something familiar and unique such as Roving reporter Weather guy etc the new name is reflected in several places In the Web based Interface In Comrex provided utility software such as Device Manager In Switchboard Contact Lists Incoming Connection Password Allows you ...

Page 47: ...te for always on operation This is useful in environments where a signal is required to be on 24 hours a day To assign an always on remote pull down the menu and select which remote to designate as always on A connection will be made and sustained to the chosen remote ...

Page 48: ...rules for remotes to be triggered by the four external input triggers available NOTE These inputs are shared with the end to end contact closure signals so if a remote is designated as Auto Connect on a closure that closure signal is not available for use in the direction from this ACCESS To assign a remote connection to a contact closure pull down the menu box next to the desired closure and sele...

Page 49: ...case You can disable the remote control and firmware updating functionality completely by disabling the Remote Control option Remote Control If this function is disabled the unit will not serve any webpage from its IP address and the firmware updater will not function If this option is enabled you should define a password that will be used to enable both functions ...

Page 50: ...ist BRIC Normal Settings The default way ACCESS codecs connect between each other is called BRIC normal The options in this section define if and how these connections are completed Accept Incoming Connections This determines if this ACCESS is to be used for incoming normal IP connections If this function is not enabled ACCESS will only support outgoing calls using BRIC Normal Mode ...

Page 51: ... Telos Zephyr XStream Standard RTP is not a complex protocol so you must manually apply settings for both outgoing and incoming profiles For complete details please review Appendix A IP Compatibility on page 149 Accept Incoming Connections Allows the unit to automatically answer incoming calls Incoming Connection Profile Shows which profile has been selected for incoming connections ...

Page 52: ...e handled Outgoing calls are defined as TCP in profile configuration ACCESS normally listens for incoming calls on both TCP and UDP ports and chooses the first to arrive If a TCP call is detected ACCESS will attempt to use the same TCP link to transmit in the reverse direction Accept Incoming Connections Allows you to turn TCP Auto Answer on and off Disabling this function means only outgoing TCP ...

Page 53: ...ile In Out Tip Send Audio To Phone Ring Receive Audio From Phone Sleeve Ground 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 Serial Port Pinout Pin Function Direction 1 CTS To ACCESS 2 RTS From ACCESS 3 RX Data To ACCESS 4 Ground 5 TX Data From ACCESS 6 7 8 Ground ...

Page 54: ...ance path to Pin 9 and when active will offer a low impedance path to Pin 9 These outputs are capable of sinking up to 200mA at a voltage up to 12V Do not switch AC mains power using these contacts Contact Closure Pinout Pin 1 Output 1 Pin 2 Output 2 Pin 3 Output 3 Pin 4 Output 4 Pin 5 Input 1 Pin 6 Input 2 Pin 7 Input 3 Pin 8 Input 4 Pin 9 Ground Note Adapter cables for the serial and contact clo...

Page 55: ...dual language broadcasts to be combined to a single outgoing stream Note It isn t possible to send one stream to location A and one to location B However it is possible to send the combined stream to locations A and B and have them tap only their respective channels although this can be a confusing solution subject to operator error OPUS Opus is an audio coding format that is gaining in popularity...

Page 56: ...E AAC This is a newer version of AAC defined for increased efficiency The goal of the algorithm is 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 a technique that partially synthesizes these high frequencies HE AAC is trademarked by other companies as AACPlus HE AAC and close derivat...

Page 57: ...adds Parametric Stereo to SBR for higher quality audio at low data rate 48 kb s 184 ms 20 kHz G3 Stereo 48Kb adds Parametric Stereo to SBR for higher quality audio at low 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...

Page 58: ...Mono 48kbps 56Kb s 41 ms 20 kHz N4 2 Mono 56kbps 64Kb s 41 ms 20 kHz N4 3 Mono 64kbps 64Kb s 41 ms 20 kHz N5 1 Stereo 64kbps 96Kb s 41 ms 20 kHz N5 2 Stereo 96kbps 128Kb s 41 ms 20 kHz N5 3 Stereo 128kbps 48Kb s 41 ms 20 kHz N6 1 CBR Mono 48kbps 64Kb s 41 ms 20 kHz N6 3 CBR Mono 64kbps 64Kb s 41 ms 20 kHz N7 1 CBR Stereo 64kbps 96Kb s 41 ms 20 kHz N7 2 CBR Stereo 96kbps 128Kb s 41 ms 20 kHz N7 3 C...

Page 59: ...witchboard Server The two choices under the Switchboard Server are Switchboard Enabled and Show Offline Units To use Switchboard the Switchboard Enabled must be enabled Setting the Show Offline Units to enable will allow you to see the other units on the account even if they are not currently online Logging In And Setting Up Switchboard In order to use Switchboard you must first have an account wi...

Page 60: ...nput in a format with colons between each pair of characters Once the unit s MAC address es is are input correctly you will see them appear in the unit list Once a codec is added you should break the network connection to the codec unit in order for the device to properly sync with Switchboard The next time the properly configured codec goes online it will sync with the server The codec name and o...

Page 61: ...he remote unit and make the connection automatically Creating Users You may wish to add additional Switchboard users who can access the Switchboard interface You can do this via the Users tab at the top of the main codec list This allows you to create accounts for users that can later be deleted Several user accounts can be created with unique passwords ...

Page 62: ...nits within your Switchboard account may be assigned to Contact Lists By default a master Contact List is created that contains all codecs on your account And by default every codec in your fleet uses the master list So if you re not interested in segregating codecs on your account the default configuration will work fine As shown above you can select one of your individual codecs and change the A...

Page 63: ...ou to choose a subset of your fleet for this Share After you make your selection you ll need to enter either the name of the account you wish to share with or the email address of the administrator of the account it must be the one they used to create their Switchboard account An email will be sent from the server asking the user to confirm your Share s Once the Share s is are confirmed your share...

Page 64: ...t address will change over time This is because the vast majority of internet users establish their addresses via DHCP a protocol whereby a server maintained by the ISP will deliver one of their available addresses to the client on initial connection That address is leased from the server for a particular time period After the lease expires the server is free to change it The commonly used Network...

Page 65: ...be memorized or input into each codec individually The first function Switchboard works around is the dynamic IP address problem by acting as a Directory Server Codec users simply log in to the free server and are given an account name and password Once logged in it s a simple process to input the details of each codec owned On the codec itself the user will input a familiar name by which the code...

Page 66: ...automatically Connections can be made by simply clicking on the correct name without any updating on the part of the user The other roadblock provided by the use of NAT routers is the inability to accept unsolicited incoming connections from the Internet Generally this function acts as a rudimentary firewall and is a net positive for security but it does cause headaches for codec users A router th...

Page 67: ...to different port numbers but perhaps to the same IP address Port numbers are also used by NAT routers in segmenting applications flowing through them and they may change source port numbers at will Network Address Translation NAT refers to the ability of a router to translate requests from computers or codecs within its LAN onto the public internet On its most basic level this involves replacing ...

Page 68: ... 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 keep a hole punched through the majority of NAT routers These techniques are based loosely with enhancements on a...

Page 69: ...sLock allows lots of other information to be shared between the endpoint including information about network quality and far end delay settings This provides for much better delay management on both ends of the link One or both ends of a CrossLock connection can utilize multiple network interfaces This can take the form of two Ethernet connections or any mix of wired and wireless networks A common...

Page 70: ...System Settings CrossLock settings and set the value to On for the Redundant Transmission entry Usage of dual networks on both ends of the link is not supported when at least one codec is ACCESS 2USB The CPU power in ACCESS 2USB can not support this CrossLock and Switchboard It is recommended that CrossLock connections be made in conjunction with the Switchboard Traversal Server ACCESS users can g...

Page 71: ...pted via Switchboard and the following is true 1 The ACCESS on the far end is running firmware 4 0 or higher 2 The CrossLock port is UDP 9001 open to the far end 3 Each ACCESS is aware of the other s Unit ID Mac address This is handled behind the scenes in Switchboard Then a CrossLock connection will be attempted If port 9001 is blocked or if the far end connection has 3 x or lower firmware the co...

Page 72: ...works or STLs you will need to know the unit ID Primary Ethernet MAC address of the unit to which you wish to connect This is input to the Create New Remote pop up in the MAC Address field In addition the codec receiving the connection must have a similar entry made with the MAC Address of the calling unit populated ...

Page 73: ...s as well as manage the delay settings during the connection Utilization Graph The Utilization tab displays 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 expected that the size of these bars will vary because CrossLock has control over data rate through a technique called throttling Base...

Page 74: ...ion FEC or Automatic Repeat Query ARQ error correction built into CrossLock Delay Slider The most powerful way to stabilize any streaming connection is to have the decoder add a delay buffer to the connection This compensates for changes in the rate packets are received known as jitter in Internet speak CrossLock uses a combination of decode delay buffering and error correction to keep connections...

Page 75: ... increase and decrease in size based on the history of jitter experienced by CrossLock on the network In Auto Delay mode two other elements are of interest The downward arrow signifies the Target Delay which is the best compromise value calculated by the system to balance stability and delay The bubble indicates current delay The Current Delay bubble will attempt to track with the Target Delay Arr...

Page 76: ...Scan for Devices to find any device that is on the same physical IP network as your computer The list will include the unit MAC address device type and the unit name Alternatively if you know the public IP address of a Comrex device and TCP port 80 has been forwarded to that device you can manually add the device and perform certain functions such as updating firmware from outside your network Onc...

Page 77: ...ng your units up to date and checking for updated firmware on a regular basis To update your device select Get Latest Version to download the update file Next click Update Device You will be requested to select the file to use Navigate and select the file you just downloaded The status of the upgrade will show in the bottom of the window Once completed the device will automatically reboot The Lice...

Page 78: ...on ACCESS called Toolbox The Toolbox interface allows you to configure several options including the Ethernet port You will need to log in to Toolbox separately with a user name any and password default comrex to enter the Toolbox To learn more about Toolbox visit the section Toolbox page 79 ...

Page 79: ...ribed in the Network Menu section but in some cases such as when configuring an ACCESS Rack it can be much easier to use Toolbox You can log into Toolbox either via Device Manager or through the IP address of the unit with a cfg appended to it e g 192 168 0 34 cfg Once logged into Toolbox choose the Network Admin CrossLock option and then choose Set up Ethernet and Wireless ...

Page 80: ...S between venues and want to store the static IP information for each venue you will define a new location giving it a unique name Once multiple locations are defined you can switch between them using the Active Network Location option Locations can be configured for any network device including the Wi Fi adapter This can be useful in programming credentials for use in multiple Wi Fi environments ...

Page 81: ...ter by selecting Active Network Location and selecting the network from the drop down list If the Wi Fi adapter s location is set to Automatic it will check all location settings when the Wi Fi adapter is enabled and choose the first location match it finds ...

Page 82: ...Caution should be used as it s possible to lock yourself out of the ACCESS by setting the Ethernet parameters incorrectly Use with CrossLock Normally enabled this option allows you to specify that this network port will not be considered as part of a CrossLock connection This may be valuable when using one port for control purposes only and a secondary port for CrossLock media Broadcast Config Nor...

Page 83: ...stem Settings CrossLock VPN Settings choose enable and deselect the enable option No outgoing or incoming CrossLock connections will be possible It is also possible to disable individual CrossLock connections under remote entries that appear in the Switchboard list By choosing Change Remote Settings and deselecting the CrossLock option this connection will bypass CrossLock ...

Page 84: ...tored the packets stream will be restored to the decoder For most applications such as remote broadcasting it s useful to simulate a connection oriented stream so ACCESS 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 which is where UDP exists By default it monitors the...

Page 85: ...nu of all available connections Setting this value to one of your pre defined connections results in configuring the unit for 24 7 operation to that remote No configuration is necessary on the remote side ACCESS has another option for continuous connections When building a remote entry there is a field for backup options One of those options is called Keep Retrying This Remote ...

Page 86: ...tent connection The difference is that the Disconnect function still works and the connection will not be reinitiated on a power re cycle This mode is meant for users who are making temporary connections but do not want the system to time out and disconnect in the event of network failure ...

Page 87: ...gorithms and the transport layer that could be used on them for compatibility However 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 start of an IP codec call The most commonly used protocol for this is called Session Initialization Protocol or SIP This is used extensively by VoIP phones and therefore w...

Page 88: ...es 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 alphanumeric name to each subscribed account For example an Iptel user may be assigned the user name comrex_user URIs consist of a SIP user name followed by a doma...

Page 89: ...on the portable display 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 usually means that registration attempt failed It s best to go back and carefully check the registration info It might also be useful to check that your registration information is valid by using it to configure a V...

Page 90: ... vast majority of EBU 3326 SIP based applications However there are inevitably situations where the defaults don t work We ve provided some advanced options that can help As always these options are located in the Systems Settings 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 betwee...

Page 91: ...ding may be required to accept calls if your codec is behind a router The main area where SIP complicates matters is in how an audio channel gets established once the handshake channel is defined In the common sense world the call would be initiated to the destination IP address then the called codec would extract the source IP address from the incoming data and return a channel to that address In...

Page 92: ...IP options and essentially allows for the codec to learn what its public IP address is It does this by contacting a STUN server out on the Internet the default one is maintained by Comrex and simply asking If this option is enabled the codec itself will handle the address switching Be aware of the dreaded battling workarounds issue In our simple description we left out the fact that ports are bein...

Page 93: ...lticast which is described in the next section Note Multi streaming is unsupported with CrossLock connections Each ACCESS can also run only one decoder so it s important that in a multi stream environment a maximum of one stream is sent in the reverse direction This means that users interested in hearing a multi stream must turn off their encoders This can be a bit confusing because multi streams ...

Page 94: ...n this profile the Remote Transmitter is turned Off Most other selections in this profile are irrelevant User A will define remote connections for ACCESS B C and D He will assign the Multi Duplex profile to ACCESS B and Multi Simplex profile to the others He will then establish a connection with ACCESS B first followed by C and D In model number 2 where the serving ACCESS accepts all incoming conn...

Page 95: ...ate LANs and WANs are IP Multicast capable IP Multicast supports only a single direction stream An IP Multicast encoder cannot receive input streams In this manual we assume that IP Multicast users will be familiar with the basic concepts of setup and operation of the network so we will focus on how to configure ACCESS for Multicast mode Multicast Profiles To set any remotes to Multicast you must ...

Page 96: ...ese remotes are configured within a special address range known as a Multicast Block typically 224 0 0 0 to 239 255 255 255 To establish a Multicast 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...

Page 97: ... 9000 may also be changed on Multicast remotes The port number is assigned in the usual way directly after the IP address preceded by followed by the TTL As an example the IP address of a Multicast Sender on port 443 with a TTL of 100 would read 224 0 2 4 443 100 ...

Page 98: ...Channel Stats Graph tab provide real time graphs of outgoing and incoming packets Each column represents one second of outgoing data segmented into audio coding data shown in blue and overhead such as IP UDP headers RTP headers and similar data shown in light blue The Numeric Channel Statistics tab gives an indication of the same values instantaneously as well as the total amounts of incoming and ...

Page 99: ...s area covers a large span the relative jitter is high If the light blue section of the graph is small or invisible over a time period there has been very little jitter present Based on the historical value of this jitter figure the buffer manager will expand or contract the receive buffer lengthening and shortening overall delay The time interval over which this measurement is assessed is called ...

Page 100: ...to each end of the link This includes coding delay and buffering but does not include any delay caused by the network Frame Loss Rate The percentage of packets considered to be lost and subject to error concealment Remote Loss Rate The percentage packet loss reported by the decoder on the far end of the connection This statistic is only valid when using the BRIC normal channel between two ACCESS u...

Page 101: ...around 25 overhead for each stream The Genre Info URL and Public options may be set for anything or left alone These options if applied will be embedded into the stream Decoding A HTTP Stream To decode a stream open one of the supported players and find the option to open a URL based stream In Winamp and VLC input the address of the ACCESS in the following format the address is merely made up for ...

Page 102: ... Interface open a Flash enabled web browser on a computer that is on the same physical IP network LAN as the ACCESS unit and input the IP address of the ACCESS Once you are connected to ACCESS a login screen will appear Type in any username along with the default password comrex Tech Tip You can also access the Web based Interface from a browser on a computer that is not on the same LAN when you f...

Page 103: ...3 Registration Status This window provides various network information and status including Switchboard TS status if licensed SIP registration status the units public IP address and NAT type 4 Chat Window Allows for a chat utility between any users that are logged into that particular ACCESS web interface In addition when ACCESS is connected to a remote user chat text will appear from any users lo...

Page 104: ...est Remote entries By default three remotes are already present on the Connections tab and can be used immediately for testing Loopback is a testing mode for estimating quality and best case delay in which a single ACCESS encodes and decodes the same audio in a loopback configuration the send and receive portions are connected together Comrex Lab Voice and Comrex Lab Music are codecs you can conne...

Page 105: ...contact list those codecs will populate automatically in the device s Remotes list once it is powered up and registered with Switchboard This makes connections for broadcasts quick and easy Units that are added from your Switchboard contact list will show up in the Remotes list with a grey background as shown above Connecting and disconnecting to remotes To connect and disconnect remotes select th...

Page 106: ... number for a POTS call Next you must decide if you intend to use CrossLock for the connection Comrex recommends the use of CrossLock for most connections because the VPN Virtual Private Network created by CrossLock increases connection reliability in most circumstances Unless you know of a specific reason that your setup might not support CrossLock we suggest enabling it CrossLock connections tha...

Page 107: ...se when making these connections ACCESS includes several default profiles to choose from each of which enable a simple full duplex link using one of the available algorithms If you wish for a more complex feature set when making this connection you will need to navigate to the Profiles tab and set up a specific profile using your custom parameters To learn about creating Profiles visit the section...

Page 108: ...ly you may specify how the unit is to behave when connection is lost to this remote Edit Remotes Existing remotes may be edited by highlighting a remote from the list and selecting Change Remote Settings Tip CrossLock Unit IDs MAC Addresses can not be edited the remote entry must be deleted and recreated to edit outgoing CrossLock info Delete Remotes Remotes can be deleted by highlighting a remote...

Page 109: ...ered a legacy resource to view network performance The CrossLock statistics available on the CrossLock tab is recommended to be your source for this data These stats are considered superior to the Media Statistics and should be used when monitoring network performance CrossLock Stats allows you to see CrossLock in action You can determine how many networks are being utilized the delay associated w...

Page 110: ... own profiles When using ACCESS the point where the connection originates controls all available connection parameters in both directions Keep in mind that these profiles are useful only for connections initiated from the local ACCESS Incoming connections are defined by the ACCESS at the other end Viewing Profile details To view the parameters set for a profile select the profile in the PROFILE li...

Page 111: ...n menu To build a new profile select Add New and a new profile appears on the list labelled New Profile Select it and press Edit and you ll see a list of options IMPORTANT Building a profile doesn t change how any remotes connect until that profile is assigned to a remote Default Profile When a new remote is created a default profile is assigned unless a different profile is selected from the drop...

Page 112: ...he unique MAC address of the Ethernet port When this is changed to something familiar and unique such as Roving reporter Weather guy etc the new name is reflected in several places In the browser used to show the remote control page In Comrex provided utility software such as Device Manager In Switchboard Contact Lists Always Connect to Remote This setting is available to designate a remote for al...

Page 113: ...ect to remotes Switchboard Server Address Shows the IP address of Switchboard Stun Server Address Enables the unit to contact the STUN server maintained by Comrex to learn what its public IP address is Show Offline Units When enabled offline remotes will be shown in the Remotes list 113 ...

Page 114: ...tact closure pull down the menu box next to the desired closure and select the proper remote A connection attempt will be made whenever the contact is triggered and will disconnect whenever the contact is released You can also assign the F2 key to trigger Contact Closure 1 at the remote codec Activate contact closure 4 output when connected Under normal circumstances the contact will close when co...

Page 115: ... used for the audio data It does not remove any audio data the serial data is added to the packets and bandwidth is increased to support the additional data For this reason heavy use of serial data can affect overall codec performance Settings are available for Baud Rate Data Bits Stop Bits Flow Control and Parity Most users will leave the defaults of 9600 8 1 No Flow Control and No Parity 115 ...

Page 116: ...eted Leaving the field blank will disable this function GUI Password Allows you to define a password for the webpage login screen and firmware updater The default password is comrex lower case Enable remote SSH access Enables Comrex support to connect to this unit using the SSH protocol for troubleshooting purposes We recommend leaving this option enabled Since SSH access requires a key value that...

Page 117: ...C normal The options in this section define if and how these connections are completed Accept Incoming Connections This determines if this ACCESS is to be used for incoming normal IP connections If this function is not enabled ACCESS will only support outgoing calls using BRIC Normal Mode 117 ...

Page 118: ... no POTS calls will be answered and only outgoing POTS connections can be made EBU 3326 SIP Settings This is and advanced topic and is covered in the section Making EBU 3326 SIP Compatible Connections on page 87 CrossLock VPN Settings This is an advanced topic and is covered in the section CrossLock Details on page 69 118 ...

Page 119: ...software licensing The Software Licensing button shows you which licenses are currently active to your unit This is also where you can add licenses 119 ...

Page 120: ...will assure that outgoing user data will not affect outgoing codec packets On the return channel priority of audio codec packets vs user packets are determined by the ISP so heavy user data may have an effect on decoder performance CONNECTING AS A GATEWAY Under most circumstances ACCESS will be sharing a network attached to its USB jacks and distributing data to other users via Ethernet In this co...

Page 121: ...ation Navigate to Network Manage Networks Select the Ethernet Port from the list select the Configure button and then go to the Locations tab Create a new location by selecting the Add button or edit the default location Select IP Type press the Edit button and select Gateway from the dropdown menu In Gateway Mode ACCESS is acting as a DHCP server and router to the other devices It will assign a d...

Page 122: ...d deliver an IP address within 60 seconds If no IP address is obtained the device will not function When using 3G adapters based on GSM standards non EVDO devices you may or may not need to apply an APN Access Point Name in order to establish connections and get an IP address When using 3G adapters and USB dongles in Windows laptops this information is usually automatically supplied by the device ...

Page 123: ... by ACCESS Contact closures and ancillary data supported by legacy codecs are not supported by ACCESS When defining any outgoing connection a profile must be assigned to it For POTS Codec compatible connections the factory default POTS profile should work best Using ACCESS With POTS To use ACCESS on POTS insert the Comrex supplied USB POTS modem into the USB jack Connect the phone cord to a normal...

Page 124: ... You can force the system to drop to the next lowest connect rate by clicking the Rate Drop button at any time Audio transfer will be interrupted momentarily while the units negotiate the new connect rate Alternately you can force the system to initiate the entire training sequence again the chat sounds heard at the beginning of a call by clicking the Retrain button You will lose audio for a longe...

Page 125: ... same time of day that you plan to use it This will give you a good idea of expected connect rates and possible line problems 5 At minimum connect a few minutes before airtime to assess the connection quality Setting a MaxRate on the POTS codec based on your findings is highly recommended MaxRate usually should be set at a level or two below the maximum unrestricted rate This will provide a guard ...

Page 126: ...e settings for this network will be preserved after factory reset Caution should be used as it s possible to lock yourself out of the ACCESS by setting the Ethernet parameters incorrectly Use with CrossLock Normally enabled this option allows you to specify that this network port will not be considered as part of a CrossLock connection This may be valuable when using one port for control purposes ...

Page 127: ...utomatically establish a connection POTS or IP to the designated backup It will maintain that connection until it is manually disconnected To enable an automatic backup both the primary and secondary remote connections must first be defined and assigned profiles Next select the primary remote and select Change Remote Settings On this screen choose the pull down menu labeled Backup Remote and selec...

Page 128: ... an incoming POTS call cannot restore an IP connection The backup connection must be an IP connection for an automatic restoration to take place NOTE Only IP connections can be designated as primary connections Both IP and POTS connections can be backups Profile settings Global Profile Settings Profile Name Allows you to name the new profile Tap the Keyboard icon in the bottom Navigation bar to br...

Page 129: ...t Linear PCM G 711 and G 722 These compatibility modes are provided on a best effort basis They are not guaranteed to be compatible with other manufacturer s implementations ACCESS is not strictly compatible with Tech3326 because it does not support all mandatory encoders For more information on EBU 3326 SIP please see Making EBU 3326 SIP Compatible Connections on page 87 NOTE It s important to de...

Page 130: ...ccurs or a connection is ended abruptly for some other reason the system will drop the connection after a pre determined time The default is 60 seconds but this can be shortened or lengthened here Encoder Using this menu you can select the encoder used to send audio from this ACCESS local as well as the encoder used to send audio to this ACCESS remote The default value of the remote encoder is to ...

Page 131: ...n one can reduce network usage at the expense of delay This is because this setting reduces the frequency with which packet overhead bits like IP and UDP headers are sent Decoder Downmix This allows the decoded stereo two channel audio that arrives at the receive end to be downmixed to a mono signal The choices are None Mono Left Only Mono Right Only and Mono Full Except for None these are mainly ...

Page 132: ...ggered Default is one second The Retransmit Squelch Max function determines the longest period of data loss during which the squelch function is active The default is two seconds During the squelch period the buffer manager will ignore the relative jitter experienced and will not adjust buffer size to compensate Fixed Delay This option simply sets the Delay Cushion and Delay Limit at a similar val...

Page 133: ...lculates a delay target that is generally more conservative and this option allows that target number to be used Our testing shows best results with the default delay target Log Statistics This function is used in factory diagnostics and should be left disabled unless instructed to be changed by Comrex support Congestion Avoidance Enabling this option allows the encoder to dynamically change the n...

Page 134: ...e audio stream As an example if you re audio stream is consuming 80 kb s of network bandwidth and UDP Max Retransmissions is set at 50 up to 40kb s additional network bandwidth may be used for error correction Advanced System Settings When the Advanced System Settings box is checked a few additional options are shown Note that some of these functions are also shown in the System Settings section b...

Page 135: ...y audio data the serial data is added to the packets and bandwidth is increased to support the additional data For this reason heavy use of serial data can affect overall codec performance Settings are available for Baud Rate Data Bits Stop Bits Flow Control and Parity Most users will leave the defaults of 9600 8 1 No Flow Control and No Parity Connections Disable Congestion Avoidance Turns Avoida...

Page 136: ...wser in order to see the unit As an example if the Web Server Port is changed from 80 to 84 the address of the unit must be entered in a browser in the following manner http 192 168 1 142 84 If this value is changed there isn t any need to change the way you get the remote web page the change is automatically reported to the browser when the page is addressed The web server port is also used by th...

Page 137: ...fic with only specific port numbers Each IP connection has a source and destination port In most cases the source port is unimportant but the destination port can determine whether or not the connection will be made Certain incoming ports can be firewalled to outside traffic and in the case of more than one ACCESS unit behind a router sharing a single public IP address the only way for them all to...

Page 138: ...he following into the IP address field 70 22 155 131 5004 Note that the last four digits of the IP address are the numbers corresponding to the port at the receive point Be aware that the call will fail unless the ACCESS on the far end is set to receive data on that port IP Port This option allows you to define the incoming UDP port for incoming IP connections This is explained in detail in the pr...

Page 139: ...ill change which incoming ports are used to initiate connections and to which ports connection requests are sent The change must be made on both devices NOTE this change will essentially make your codec incompatible with industry standard VoIP devices User Agent Blacklist Allows entry of list of SIP user agents that will not be allowed to communicate with this ACCESS unit Must be entered with name...

Page 140: ...rname SIP Auth Username Allows entry of SIP username for authentication SIP Password Allows entry of password for authentication Send RTP to source port Enables disables the ability to send RTP data to the remote port matching the source of the received RTP packets rather than the negotiated port SIP Routing Enables routing of SIP messages NOTE May adversely affect the ability to traverse NAT fire...

Page 141: ... Port Sets incoming network port Encoder Sets the encoder used for streaming Must be compatible with the media player Genre Sets genre for HTTP streaming Default is Live Info URL Sets informational value of the URL associated with the stream Public Enables disables setting of the public stream ...

Page 142: ... baud rate for connections Default is 2400 Min Modem Rate Sets the minimum allowed baud rate Default is 9600 Extra Modem Init Allows entry of a modem initialization string Accept incoming connections POTS calls must be answered automatically on ACCESS If this option is disabled no POTS calls will be answered and only outgoing POTS connections can be made ...

Page 143: ...t unknown gear Luci Live Lite default The encoder will adapt the RTP stream to be more compatible with the Luci brand smartphone app Zephyr Xstream The encoder will adapt the RTP stream to be compatible with the Zephyr Xstream ISDN codec in IP mode Standard RTP modes other than Luci are experimental and are not subject to support by Comrex support staff Return Channel Enabled Enables a return chan...

Page 144: ...144 TCP Settings IP Port Allows entry of incoming network port Default is port 9000 CrossLock settIngs Enable Enables the use of CrossLock ...

Page 145: ...ificates after upgrades this option is defaulted off Protection ACCESS has the ability to prevent interception of streams Encryption and alteration of streams Protection The CPU requirements of these modes are large and therefore it is not recommended to apply these options to streams when not required They are set to off by default to conserve CPU Maximum Delay CrossLock operates by choosing a Ta...

Page 146: ...Manager license to throttle the encoder This can be defeated by setting this value to No Stun Server CrossLock uses its own Cloud Server STUN to determine the NAT status of each codec before connection This can be set to a different value than the main STUN server used to provide status to the Remote Connections page Default is always the Comrex server at stun comrex com Always Connect This option...

Page 147: ...router solution that will offer ACCESS priority over other traffic Next take a look at the Stats tab on the ACCESS that is decoding the faulty audio Check the jitter figure for your incoming connection If this number is varying dramatically good networks keep this figure below 50mS then you may need to increase the Local Delay Cushion setting within the profile used to connect to that remote Altho...

Page 148: ...n port 9000 9001 for CrossLock connections SSH is enabled by default but requires a passkey You can disable it completely in the Security section of the System Settings menu by setting the Remote Diagnostics option to Not Enabled Leaving Remote Diagnostics SSH enabled will help if Comrex support needs to interface with your ACCESS Q I notice in the Advanced Options that I can change my streaming f...

Page 149: ...e Luci Live b Incoming Connections Luci Live sends either an AAC or HE AAC stream to the ACCESS on UDP port 5004 These streams will be automatically decoded By default a return channel of AAC 56kb 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 ACCESS that do not have the AAC upgrade applied will not create a ...

Page 150: ...ly decoded By default a return channel of AAC 96kb s mono is returned to the Xstream The return channel may be altered to any Xstream compatible mode in the Systems Setting section ACCESS that do not have the AAC upgrade applied will not create a return channel c Outgoing Connections ACCESS AAC Option required Build a profile using the Profile Manager on either the ACCESS Rack or Portable and sele...

Page 151: ...e 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 On Off on products shipped after 1 July 2017 TCP 80 HTTP control On TCP 443 TLS protected HTTP control On TCP 8081 Firmware upload Open ...

Page 152: ...dvanced Standard RTP Settings find the Return Channel Enable entry Disable the return channel and click Apply or Save on ACCESS 2USB Portable This will make sure that no channel will be set up in the direction to the encoder ENCODE SIDE SETTINGS ONLY Obviously connections of this type must be established from the encoding side of the link So you ll need to build a new Profile that uses the Standar...

Page 153: ...nly Right channel to another Use of the decoder downmix function has two drawbacks As with all multi streams in ACCESS full duplex operation is only supported to one destination Also both channels of the stream are actually delivered to both destinations over the network utilizing more incoming network bandwidth to the decoder than necessary The figure above shows a typical connection using the De...

Page 154: ...s scenario two independent channels can be sent to two independent locations using a single ACCESS codec on the transmitting end This function can also be used in a round robin contribution application where mutliple remote reporters are all interested in adding to a conversation and still be able to hear each other This scenario is a bit more complex but is aided greatly by use of the Vortex Hots...

Page 155: ...CIFICATIONS Mono Input Type Balanced Impedance Mic 20k Ohms pins 2 3 Line 200k Ohms pins 2 3 Level Mic 60 dBu nominal 15 dBu max Line 0 dBu nominal 20 dBu max Stereo Line Input Type Unbalanced Impedance 9k Ohms tip to sleeve or ring to sleeve Level 10 dBu nominal 10 dBu max Line Output Type Unbalanced Impedance 0 Ohms tip to sleeve or ring to sleeve Level 10 dBu nominal Mobile In Out Type Unbalanc...

Page 156: ... 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 any time Comrex also reserves the right to remove any account from the s...

Page 157: ...ons ncurses Copyright c 1998 1999 2000 2001 Free Software Foundation Inc See further Copyright notice below dropbear Copyright c 2002 2004 Matt Johnston Portions copyright c 2004 Mihnea Stoenescu All rights reserved See further Copyright notice below libxml2 Copyright C 1998 2003 Daniel Veillard All Rights Reserved See Further Copyright notice below Import code in keyimport c is modified from PuTT...

Page 158: ...c tive provided you obtain a return authorization from Comrex and return the product shipping prepaid to Comrex Corporation 19 Pine Rd Devens MA 01434 USA For return authorization contact Comrex at 800 237 1776 or 978 784 1776 or email techies comrex com This warranty does not apply if the product has been damaged by accident or misuse or as a result of service or modification performed by anyone ...

Page 159: ...ORTION THEREOF IS STRICTLY PROHIBITED AND MAY RESULT IN CIVIL AND CRIMINAL SANCTIONS AND WILL BE PROSECUTED TO THE FULL EXTENT OF THE LAW COMREX CORPORATION AND ITS SUPPLIERS OWNS AND SHALL RETAIN ALL RIGHT TITLE AND INTEREST IN AND TO ANY SOFTWARE SUPPLIED TO YOU IN AND AS PART OF THE PRODUCT AND ALL INTELLEC TUAL PROPERTY RIGHTS RELATED THERETO THE SALE OF THE PRODUCT SHALL NOT BE CONSTRUED IN A...

Page 160: ...vironment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Individual plug i...

Page 161: ...cuments 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 Individual plug in devices for wired and wireless connectivity will have their own certifications from their manufac turers Information is available on each device s label Information regarding...

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