Comrex ACCESS STEREO BRIC IP Manual

page of 119

/ 119
Bookmarks

Quick Links

Download this manual

ACCESS S

Warning: Advanced Topic

ABlE of

ontEntS

ectIon

BrIC IP C

tErEo

You'll be seeing me from time to time throughout this manual to

point out ACCESS advanced topics. Feel free to ignore these sections

as the default settings provide good performance for most users.

...........I

......................................................................................... 7

ntroductIon

.......................A

brIc .............................................................................. 8

bout

.......................M

ore

bout

.......................W

hAt

oMeS

...........r

Ack

IAgrAMS And

.......................r

eAr

Anel

.......................F

ront

.......................M

ono vS

.......................P

InoutS

.......................P

InoutS

.......................P

InoutS

...........S

AcceSS ............................................................................... 13

ettIng

.......................h

ookIng

.......................A

bout

.......................S

ettIng

.......................d

ynAMIc vS

...........g

AInIng

cceSS to

.......................t

oP And

.......................n

etWork

...................................e

...................................PotS M

.......................W

roWSer

.......................r

eMoteS

.......................S

tAtS

.......................A

udIo

evel

.......................c

onFIgure

...........c

AcceSS

onFIgurIng

.......................M

AnAge

.......................P

roFIle

.......................S

ySteM

.......................u

Ser

nterFAce

.......................c

AlIbrAte

.......................r

eSet

onFIgurAtIon

odEC

AcceSS r

......................................................... 9

Ack

AcceSS r

Ith

Ack

.............................................................. 10

nStAllAtIon

IAgrAM And

eScrIPtIonS

Anel

IAgrAM And

eScrIPtIonS

. S

........................................................................ 11

tereo

- A

......................................................................... 11

udIo

- c

......................................................... 12

ontAct

loSure

- S

................................................................. 12

erIAl

ort

.............................................................................. 13

...................................................... 13

etWork

onnectIonS

AcceSS n

etWork

onnectIonS

. S

..................................................... 15

tAtIc

ddreSSIng

AcceSS

vIA the

onSole

ottoM

AvIgAtIon

ArS

............................................................................. 19

.................................................... 19

thernet

ort

...................................................... 20

odeM

............................................................................ 21

.............................................................................. 21

.................................................................................. 24

........................................................................ 26

........................................................................... 26

vIA the

onSole

onnectIon

........................................................................ 27

roFIleS

........................................................................ 30

ettIngS

......................................................................... 31

ettIngS

........................................................................... 32

............................................................... 33

ouchScreen

.................................................................. 33

................................................ 9

.......................................... 10

........................................ 11

.................................. 13

.............. 17

onnectIon

nterFAce

................................................ 17

...................... 27

nterFAce

ACCESS Rack 2.8 - FEB 2014

Need help?

Do you have a question about the ACCESS STEREO BRIC IP and is the answer not in the manual?

Questions and answers

Summary of Contents for Comrex ACCESS STEREO BRIC IP

Page 1 ACCESS S BrIC IP C tErEo odEC You’ll be seeing me from time to time throughout this manual to point out ACCESS advanced topics. Feel free to ignore these sections as the default settings provide good performance for most users. Warning: Advanced Topic ABlE of ontEntS...
Page 2 oMrex orPorAtIon ...g AcceSS ......34 ectIon AInIng cceSS to vIA the bASed nterFAce .......AcceSS W ............. 34 bASed nterFAce .......c ................ 36 onnectIonS .......S ................37 tAtIStIcS .......A ..............38 udIo eterIng .......P ................39 roFIleS ........b ............40 uIldIng A roFIle ..........l...
Page 3 ACCESS Product Manual .......S AcceSS PotS S ........ 64 ettIng uP For uSe on tereo .......r ..............65 roP vS etrAIn .......t PotS c ..........66 roubleShootIng onnectIon ...S (tS) ............67 ectIon WItchboArd rAverSAl erver .......c ........72 onFIgurIng WItchboArd rAverSAl erver...
Page 4 oMrex orPorAtIon .......n/AcIP SIP M ..............90 odeS .......u ..............90 nregIStered .......r ............... 90 egIStered .......SIP S ................90 erverS .......SIP urI .................. 90 .......r ............91 egISterIng WIth A erver .......M SIP r ............92 AkIng egIStered AllS .......A n/AcIP t ............
Page 5 ACCESS Product Manual ...F 6 - tcP/IP t ......20 Igure Ab For thernet onFIgurAtIon ...F 7 - PotS M ........... 20 Igure odeM onFIgurAtIon ...F 8 - c ......21 Igure onSole onnectIon nterFAce eMoteS ...F 9 - A ............
Page 6 Each unit we ship has been individually and thoroughly tested. Comrex stands behind its products. We promise that if you call us for technical assistance, you will talk directly with someone who knows about the equipment and will do everything possible to help you.
Page 7: Ntroduction
Congratulations on purchasing the Comrex ACCESS codec. This product is the next step in the evolution of audio transportation over networks. For Comrex, this began in 1976 with the introduction of the Frequency Extender, followed by ISDN codecs in the early 1990s and POTS codecs in 1996.
Page 8 omrex orporation brIc BRIC (Broadcast Reliable Internet Codec) is a breakthrough technology bout with hardware that will deliver audio over the public Internet in much the same way that ISDN and POTS codecs have performed in the past. BRIC consists of three pieces: • Rackmount ACCESS codec (which you are using) • Portable ACCESS codec • Switchboard Traversal Server...
Page 9 POTS codec devices made by Comrex. The following items are shipped with a new ACCESS Rack: oMeS AcceSS r (1) ACCESS Stereo BRIC IP Codec (Rackmount) (1) 6’ Ethernet cable (1) 6’ Telephone cable (1) AC Power cord (1) Operating manual...
Page 10: Escriptions
omrex orporation ECtIon IAgrAmS And nStAllAtIon Figure 1 - Rear Panel Diagram and Descriptions 14 15 CONTACT CLOSURES MODEM AES3 ANALOG LINE IN LINE IN LINE OUT LINE OUT AES3 RESET LEFT/ AES3 IN RIGHT LEFT RIGHT OUTPUT SERIAL 3 & 4 5 &...
Page 11 ACCESS Product Manual Figure 2 - Front Panel Diagram and Descriptions ECEIVE TATUS ESET 16) S Peak meter that displays the level of audio being sent locally into the ACCESS, regardless of whether or not a connection is active. Proper level is indicated by peaks driving the Yellow LEDs, while avoiding lighting the Red LEDs (which indicates clipping).
Page 12 omrex orporation Contact closures are available via the male 9-pin D connector on the back InoutS ontAct loSure of the ACCESS Rack. Inputs are triggered by shorting the respective input to Pin 5. Outputs consist of an open collector circuit which, when inac- tive, will offer a high-impedance path to Pin 5 and, when active, will offer a low impedance path to Pin 5.
Page 13: Onnections
32 binary bits. For simplicity, we break this 32-bit value into four eight-bit values and represent each as a decimal number (between 0-255) separated by dots. For example, the Comrex test IP num- ber is 70.22.155.131.
Page 14 omrex orporation Figure 3 shows connection of an ACCESS directly to the Internet using a public IP address. Figure 4 shows connection to a subnet (or LAN) using a private IP address, with a gateway router separating the LAN from the public Internet.
Page 15 ACCESS Product Manual To have the ability to make connections normally, without using the traversal functions of the Switchboard Traversal Server (Switchboard TS), one of the ACCESS in the link should be connected to a public IP address. This can be achieved several ways: 1) ACCESS can be the only device connected directly to its Inter- net link or it can share an Internet link that provides more than one IP address.
Page 16 omrex orporation Also, on 192.168 style and 172.16 style subnets, the third entry will typi- cally be a single digit (often 0 or 1). You can usually find out the DHCP assignment style by querying a Windows computer on the same LAN using Run->Cmd->ipconfig.
Page 17 ACCESS Product Manual ACCESS ECtIon AInIng CCESS to vIA thE onSolE onnECtIon ntErfACE The use of the Console Connection Interface is required when configuring the IP parameters. It also provides access to many of the features found in the Web-based Interface. We’ll cover the Console Connection Interface here, and the Web-based Interface in later sections.
Page 18 omrex orporation The bottom bar contains the following shortcuts: •Pickboard – Allows use of the pop-up keyboard for text entry and eliminates the use of a PS/2 or USB style keyboard. •Chat – Jumps immediately to the chat screen/pickboard, allowing text messaging to other ACCESS users.
Page 19 ACCESS Product Manual The Network Tab is shown in Figure 5. The Ethernet port and POTS etWork modem may be individually enabled and configured via this interface. The main tab of interest in configuring the Ethernet port is shown in etWork thernet Figure 6, the TCP/IP Tab.
Page 20 Internet Service Provider involved. This is the only mode available to connect to other Comrex POTS codecs. Because of the narrow bandwidth of dial-up Internet connections, use of POTS Codec Mode is strongly preferred over modem PPP Mode.
Page 21 ACCESS Product Manual Connections in this mode are placed in the same way that normal IP connections are placed. A remote connection must be built using one of the non-POTS based profiles and the address must be an IP address. PPP Mode depends on the modem connect rate and many codec profiles will not fit within the PPP channel.
Page 22 omrex orporation This section describes how to enter “local” remotes into the product to dial them by IP address. If you plan on using the Switchboard Traversal Server, or take only incoming calls, this step may not be necessary. For more information on Switchboard Traversal Server, see Section 10.
Page 23 ACCESS Product Manual Finally, you may specify how the unit is to behave when connection is lost to this remote (see b in the Web-based Interface AckIng onnectIon section). Once a connection is added, it will appear in the main remotes list. Return to the list by selecting Remotes and then Manage Connections.
Page 24 omrex orporation ACCESS provides lots of information on the Stats Tab about network tAtS performance. This information is divided into Channel Stats, which provides information about all incoming and outgoing data, and Peer Stats, which gives detailed information regarding the decoder buffer manager’s functions.
Page 25 ACCESS Product Manual The Peer Stats display is shown in Figure 12. The top graph represents the work of the Jitter Buffer Manager. The area of most interest is the light blue area as shown in the diagram, which illustrates a spread of jitter values (referenced to the current playout pointer) over the last second.
Page 26 omrex orporation The Audio Level Tab displays current input and output audio levels in a udIo evel digital format. The scale may be set for either dBu or dbFS, as shown in Figure 14. Figure 14 - Audio Metering The Configure Tab allows you to set up any global options on onFIgure ACCESS, as well as create custom profiles to determine the performance of outgoing connections.
Page 27 ACCESS Product Manual ACCESS ECtIon onfIgurIng vIA thE onSolE onnECtIon ntErfACE The Configure Tab offers choices on two layers as shown in Figure 15: the first two commonly used functions followed by additional, less often used functions. Figure 15 - Configure Tab Pull Down Menu Because ACCESS has many options to optimize individual connections, it AnAge roFIleS...
Page 28 omrex orporation ACCESS comes with a series of profiles that are optimized for the majority of IP and POTS connections. Many users may never have the need to define their own profiles. But many advanced options are available to help with troublesome remotes, or remotes with special requirements.
Page 29 POTS – Profile used for connections over the modem card directly to other ACCESS or other Comrex POTS codecs (not through the internet). Linear PCM – Profile used for sending and receiving Stereo uncompressed audio.
Page 30: Rofile S Ettings
omrex orporation roFIle ettIngS ACCESS provides a powerful set of controls to determine how it connects. The Profiles Tab allows you to define one or more profiles to assign to outgoing remote connections. It’s often not necessary to define any pro- files, since ACCESS ships with a set of default profiles that cover most users.
Page 31 ACCESS Product Manual The System Settings Tab defines parameters that are not specific to a ySteM ettIngS particular remote connection. Examples are how incoming (POTS and IP) calls are handled, global modem settings, and how the contact closures are assigned. The System Settings Tab is shown in Figure 18. The Systems Settings Tab has nine categories: System Settings, Aux Se- rial Settings, Security Settings, BRIC Normal Settings, HTTP Settings, Modem Settings, Standard RTP Settings, N/AICP SIP Settings and TCP...
Page 32 omrex orporation The User Interface Tab is shown below in Figure 19. nterFAce The F2 keyboard key can be user assigned to any of the most commonly used ACCESS functions. If you find you commonly use a function and are often scrolling through multiple menus to get there, simply assign the F2 Key Behavior to the proper function to create a shortcut.
Page 33 ACCESS Rack supports connection of some VGA-style touch screen AlIbrAte ouchScreen interfaces. Contact Comrex for tested models. In a mobile environment, this can allow a user-friendly interface without use of a PC or keyboard. USB-style touchscreens must be attached before booting the ACCESS Rack, and the user will be presented with a calibrations screen upon first connection.
Page 34 Once you are connected to ACCESS, a login screen will appear (see Figure 20). Key in any user name along with the default password (comrex, case sensitive) to get to the Main User Interface display. This display is opti- mized for full-screen mode (F11 on most browsers) on a 1024x768 display.
Page 35 ACCESS Product Manual There are three main parts to the ACCESS Web-based Interface screen: 1) Main Audio Meter — The level meters are defaulted to off to conserve bandwidth and client CPU, but when these are enabled this top bar emulates the front panel of ACCESS. 2) Tabs —...
Page 36 1) Loopback — Allows for connection between encoder and decoder in the same system. 2) Comrex Lab Voice — Allows testing back to the Comrex headquar- ters in Massachusetts, USA. 3) Comrex Lab Music — This additional user provides a music feed...
Page 37 ACCESS Product Manual The Channel Statistics field (#1 in Figure 22) delivers information on tAtIStIcS the total number of bits entering or leaving the ACCESS (including multi- ple connections if applicable), IP , UDP and RTP packet headers and coded audio.
Page 38 omrex orporation The lower graph displays 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 percentage of lost packets over the one second interval. The Audio Metering Tab, as shown in Figure 23, provides a representa- udIo eterIng...
Page 39 ACCESS Product Manual ACCESS provides a powerful set of controls to determine how it connects. roFIleS The Profiles Tab allows you to define one or more profiles to assign to outgoing remote connections. It’s often not necessary to define any pro- files, since ACCESS ships with a set of default profiles that cover most users.
Page 40 omrex orporation We’ll discuss the various profile options without the Advanced Options uIldIng A roFIle first, and move on to the advanced selections in the next section. To build a new profile, select Add New Profile (#1 in Figure 25) and a new profile appears on the list labeled New Profile.
Page 41 ACCESS Product Manual & r If you’ve chosen an IP-based channel (such as BRIC Normal) then you’ll ocAl eMote ettIngS be presented with two categories of options: Local and Remote. You’ll use the Local Settings to determine how your ACCESS behaves, and the Remote Settings will determine how the ACCESS on the far end behaves.
Page 42 Modem Mode – POTS Codec is the default setting and emulates the coding channel of previous Comrex POTS codecs like the Matrix, Vector and BlueBox products. ACCESS does not support compatibility with Hotline codecs. Stereo POTS allows connection between ACCESS users providing stereo audio over a dial-up connection.
Page 43 System Settings section by selecting Modem Mode under Modem Settings. To receive stereo calls, this setting must read “Stereo POTS”. To receive calls from older Comrex POTS codecs (or ACCESS configured to emulate them) the setting must be “POTS Codec”.
Page 44 omrex orporation Warning: Advanced Topic dvAnced rofile Ptions The options available in the default mode should provide good performance for most users, but in some circumstances it may become important to fine tune some of the more obscure parameters that make ACCESS work.
Page 45 IP and UDP headers are sent less often. Log Statistics – This function is used in factory diagnostics and should be left disabled unless instructed by Comrex support. UDP Reliability Max Retransmissions – This parameter allows you to set an upper limit on how much additional bandwidth is utilized by the BRUTE UDP reliability layer.
Page 46 omrex orporation correction layer to use the same amount of bandwidth as the audio stream. As an example, if your 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.
Page 47 ACCESS Product Manual Retransmit Squelch Trigger – Determines the amount of time the decoder must experience 100% packet loss before the Retransmit Squelch function is triggered. Default is one second. Retransmit Squelch Max – The longest period of data loss during which the squelch function is active —...
Page 48 omrex orporation Delay Limit – The inverse of the Delay Cushion, this parameter instructs the manager not to wind the buffer out beyond a certain delay value, regardless of how many packets are lost. This is useful in applications where staying below a certain delay figure is essential, but use of the delay limit can result in very poor performance if the network jitter dramatically exceeds the limit.
Page 49 1) In the browser used to show the remote control page 2) In Comrex provided utility software such as Remote Control and Device Manager 3) In Switchboard TS Buddy lists (See Traversal Server Section)
Page 50 omrex orporation Always Connect to Remote – #2 in Figure 26a shows the system Auto Connect options. Remote connections must be created in the Connec- tions Tab before they can be assigned to any of these functions. One field is available to designate a remote for always on operation. This is useful in “nailed up”...
Page 51 You can disable the remote control and firmware updating functionality completely by disabling the Remote Control option. Enable Remote SSH Access – Provides the ability for Comrex support to connect to this unit using the SSH protocol in order to troubleshoot. We recommend leaving this option enabled, since SSH access requires a key value that is not disclosed by Comrex, generic SSH requests are rejected.
Page 52 An outgoing call must be made to a specific port number in the form of IP_ADDRESS:PORT e.g. dialing port 5004 on the Comrex test line is formatted 70.22.155.131:5004 Ring Count – For Incoming POTS calls, this setting determines how many...
Page 53 ACCESS Product Manual RTP IP Port – Port used for audio transfer during N/ACIP SIP mode. Since this port info is transferred during the negotiation process, it can be changed without breaking compatibility. Note that RTSP data is always sent and received on the port one address higher than this.
Page 54 Loopback is chosen when you wish to test ACCESS by connecting the local encoder and decoder together. The other two entries are connections to Comrex in Massachusetts, and these may be used for your testing (when they’re not busy with other users). We maintain two CD players on these ACCESS, feeding voice and music audio respectively.
Page 55 ACCESS Product Manual To create your own outgoing connection, click Store New Remote (#1 in Figure 28) to get the entry pop-up. Choose a name for the remote (e.g. WXYZ) followed by the IP address or phone number of the remote. The next field is optional.
Page 56 omrex orporation Once your remote connection entry is correct, it’s simply a matter of point- ing and clicking to connect and disconnect a remote. When a connection is attempted, the Current State value in the connection table will change to reflect the progress of the connection. If the connection fails, the rea- son for failure will be shown in the Last State category.
Page 57 ACCESS Product Manual Figure 29 - Connections Password in the Settings Tab BRIC IP connections (and all IP traffic) use a concept known as ports to onnectIng to A PecIFIc differentiate between different applications on the same computer. A port is simply a number contained in the IP header, but it can be treated as a physical opening in and out of your computer.
Page 58 To change the destination port of an outgoing call, you must add the port number to the IP address in the following format: IP_address:port_num For example, to initiate a connection to the Comrex test line at port num- ber 5004, enter the following into the IP address field: 70.22.155.131:5004 Note: The call will fail unless the ACCESS on the far end is set to receive data on that port.
Page 59 ACCESS Product Manual ACCESS features an ability to have an automatic backup to IP remote con- AckIng uP A onnectIon nections. The backup may be either another IP connection, or a POTS phone number. Automatic backup works as follows: If an IP connection fails, ACCESS will sense this and wait the amount of time designated in the Local Timeout parameter in the profile assigned to the primary connection.
Page 60 omrex orporation To enable an automatic backup, both the primary and secondary remote orWArd unctIon connections must first be defined and assigned profiles. Next, select the primary remote and click Change Remote Settings. On this pop-up, choose the pull-down menu labeled Backup Remote (#2 in Figure 31) and select the backup for this primary connection.
Page 61 ACCESS Product Manual ACCESS 24/7 E ECtIon PErAtIng In A nvIronmEnt ACCESS can be easily set up for “always on” operation. It will be helpful to describe a little bit about the ACCESS data transfer protocol before describing how to set the system up. In BRIC Normal mode, the default mode of operation, ACCESS transfers all its audio data via the UDP protocol.
Page 62 omrex orporation As shown in Figure 32, using the Web-based Interface, 24/7 operation AcceSS ettIng 24/7 o is initiated in the System Settings Tab (using the Console Connection PerAtIon Interface, this is found in the Connections section of the System Settings menu.).
Page 63 ACCESS is capable of connections over modem links. This mode emulates the function of Comrex POTS codecs, which have been used for years to deliver high quality audio over normal, dial-up telephone lines. This mode provides for a point-to-point connection between the codecs i.e. no in- ternet access is used, and the call is placed directly from one ACCESS (or legacy codec) to the other.
Page 64 omrex orporation Figure 33 - POTS Codec vs. POTS Stereo Mode in the Profiles Tab AcceSS In order to use POTS Stereo Mode, special configuration must be done on ettIng uP each end of the link. Once an ACCESS is set for incoming POTS stereo con- PotS S uSe on tereo...
Page 65 System Settings section by selecting Modem Mode under Modem Settings. To receive stereo calls, this setting must read “Stereo POTS”. To receive calls from older Comrex POTS codecs (or ACCESS configured to emulate them) the setting must be “POTS Codec”.
Page 66 omrex orporation again (the “chat” sounds heard at the beginning of a call) by clicking the Retrain button. You will lose audio for a longer time (approx. 7 seconds) but the modems will completely re-equalize the connection and return audio when finished. Once ACCESS has dropped to a lower rate, either by rate drop or retrain from either end, there is no way to force it to connect at a higher rate.
Page 67 ErvEr The Switchboard Traversal Server is a service built and maintained by Comrex on the public Internet that provides users a directory of other users, facilitating connections to devices that would normally have trouble accepting incoming IP connections. Use of the Comrex Switchboard TS is free and comes activated from the factory.
Page 68 omrex orporation Figure 35 - The Effect of NAT Before deployment of the Traversal Server, the answer to this dilemma has been to assure that the codec located in the studio has a fixed, public IP address. By fixed, we mean that the address is allocated exclusively by the ISP , and that address is entered manually into the configuration of the codec and not subject to change.
Page 69 ACCESS Product Manual Once enabled, whenever a codec in the group gets physically connected to the Internet (by any means—3G card, satellite, Ethernet etc), the unit 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 .
Page 70 omrex orporation The other roadblock provided by the use of NAT routers is the inability to accept unsolicited incoming connections from the Internet. In a general sense, this function acts as a rudimentary firewall and is a net positive for security, but it does cause headaches for codec users.
Page 71 ACCESS Product Manual 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 the private “source” or return IP address in each packet with the true public IP and remembering where that packet was sent so that any response can be forwarded back to the proper device.
Page 72 An account on the Switchboard TS is required and can be obtained by rAverSAl erver contacting Comrex at 978-784-1776 or 800-237-1776 or by emailing techies@comrex.com or info@comrex.com. Settings can only be changed via the Console Connection Interface. The Traversal Server setup page is found in the Traversal Server section of the System Settings menu, as shown in Figure 39.
Page 73 In order to use Switchboard TS, you must first have an account with the oggIng In And ettIng server. A user name and password will be provided by Comrex. You can log uP the WItchboArd in to switchboard.comrex.com using that information. Once you’ve logged...
Page 74 omrex orporation Once the unit’s MAC address(es) are input correctly, you will see them appear in the unit list as shown in Figure 41. The next time the properly configured codec goes on-line, it will sync with the server. The codec name, AAC status and other information will be updated.
Page 75 ACCESS Product Manual Figure 43 - Switchboard TS Entries on the Web-based Interface In addition, on the Console Connection Interface the type of NAT router that is detected will be displayed on the top bar of the Remotes List. The choices are: 1) Open - No NAT detected, unit sees the Internet directly.
Page 76 omrex orporation In some situations, you may wish to create additional Switchboard users reAtIng SerS who can access the server web 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 if no longer desired.
Page 77 ACCESS Product Manual 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.
Page 78 omrex orporation Shares are a one-way transaction. If you invite an external user to share, and he accepts, you don’t get any additional status on your codecs. The external users must create a share and invite you for the share to be two- way.
Page 79 ACCESS Product Manual ECtIon Bout thE lgorIthmS ACCESS contains several different types of encoders and decoders for use on networks. brIc-hQ1 This encoder/decoder provides 15 kHz voice/music transmission with extremely low delay and low network utilization. It supports mono, stereo, uAlIty and dual-mono.
Page 80 omrex orporation brIc-ulb This encoder/decoder provides 7 kHz voice audio transmission with ex- tremely low delay and extremely low network utilization. Due to its low ltrA ItrAte digital bandwidth, it is considered to be the most robust mode for use on constrained networks.
Page 81 ACCESS Product Manual g.722 G.722- This is a well known 7KHz (medium fidelity) algorithm used in some VOIP telephones and codecs. It is provided for compatibility purpos- es, but is not considered a superior algorithm for audio codecs. This algorithm is a highly regarded standard for compressing audio to critical listening standards.
Page 82 omrex orporation ECtIon ultI trEAmIng Warning: Advanced Topic ACCESS supports the ability to run one encoder per box. But this single encoder stream may be sent to up to nine destinations simultaneously. We call this capability multi-streaming, since the encoder creates a separate but identical outgoing stream to each decoder.
Page 83 ACCESS Product Manual Figure 49 - Transmit On/Off in the Profiles Tab In the “multi-streamer as caller” model, two different profiles will be built on ACCESS A. The first profile, labeled “Multi-Duplex,” will be defined as a normal, full-duplex ACCESS connection. The encoder to be used will be selected in the Local Encoder section, and the stream desired in return will be defined in the Remote Encoder section.
Page 84 omrex orporation IP m ECtIon ultICASt Warning: Advanced Topic IP Multicast is an efficient way of delivering ACCESS digital audio streams to multiple locations. This involves relying on the network to distribute the stream to the locations that require it, rather than creating an indepen- dent stream for each user.
Page 85 ACCESS Product Manual As shown in Figure 50, when you define a new profile, you have the op- tion to choose Multicast as the profile type. Multicast profiles have fewer options than other profile types, and some of the available options will have no effect (e.g.
Page 86 omrex orporation ECtIon trEAmIng ErvEr unCtIon ACCESS has the ability to act as a streaming server, delivering AAC and HE- AAC to compatible PC based media players. Currently tested media players include WinAmp, VLC and Windows Media Player with Orban/CT HE-AAC plug-in.
Page 87 ACCESS Product Manual ECtIon AtEWAy PErAtIon Warning: Advanced Topic ACCESS includes a special operational mode that allows it to share a net- bout AteWAy PerAtIon work connection with other devices. ACCESS will create and maintain the main network channel, then act as router over a second network port to deliver data to an external device.
Page 88 omrex orporation Gateway Mode involves having two networks active and enabled on AteWAy ACCESS; The Internet side (usually an USB-based network device) which is used to connect to the world at large, and the shared side (usually Ethernet), which is used to connect with other computers. Configuring for Gateway operation may only be done through the Console Connection Interface.
Page 89 AkIng omPAtIBlE onnECtIonS Comrex codecs (and many other brands) have a set of protocols that allow easy IP connections between units. In general, when connecting between Comrex hardware, it’s best to use these proprietary modes to take the most advantage of the features of the product.
Page 90 URIs consist of a SIP user name, followed by a domain, delineated with the @ symbol, like an email address. Our Iptel user’s URI would be comrex_user@iptel.org. Comrex devices do not use the designation “sip:” before a SIP address.
Page 91 ACCESS Product Manual At a minimum, you will need the following information when registering egISterIng WIth A erver ACCESS with a SIP server: 1) The Internet address of your SIP proxy/server (e.g. proxy01.sipphone.com) 2) The user name on the SIP account (this is usually the dialing address) 3) The password on the SIP account Fig 53 shows where this information can be applied in the systems setting section.
Page 92 omrex orporation The status will reflect the progress of the registration process. When com- plete, 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.
Page 93 Changing this port to 5004 can actually have an adverse effect, since 5004 is the default port for other services on Comrex codecs. 3) Public IP Override - See the next section, SIP t...
Page 94 In the case of SIP , this must be three discrete ports (For Comrex codecs these are UDP 5060, 5014 and 5015)<6014 and 6015 with 3.0 firmware>. And since even the “for- ward address”...
Page 95 STUN. This can be enabled in Comrex codecs in the Ad- vanced N/ACIP SIP 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.
Page 96 omrex orporation ECtIon dvAnCEd oPICS This section discusses some frequently asked questions (and possible & A ueStIonS nSWerS solutions) encountered when setting up, configuring, troubleshooting and achieving optimum ACCESS performance. Q: How do I choose which encoding algorithm to use? A: ACCESS offers a very wide range of encoding algorithms.
Page 97 ACCESS Product Manual Comparison Chart for ACCESS Codecs Required Coding Audio BRIC HQ1: Sends good quality audio over narrow digital channels with low delay. Bitrate Delay Bandwidth 28 kb/s 55 ms 15 kHz A1 Mono 42 kb/s 55 ms 15 kHz A2 Stereo 56 kb/s 55 ms...
Page 98 omrex orporation Comparison Chart for AAC Codecs Required Coding Audio AAC: Provides near transparent audio at relatively high data rates. Best used on non-con- Bitrate Delay Bandwidth strained data networks - for situation where latency is not important. 64 kb/s 69 ms 20 kHz D1 Mono...
Page 99 ACCESS Product Manual Q: Can I make ACCESS maintain an IP connection regardless of net- work status? A: Yes. First define your remote setting and apply a profile to it. Next go to the System Settings Tab, and pull down the menu labeled Always Con- nect to Remote.
Page 100 Q: How can I change modem parameters like dial-tone-detect and ring cadence detection? A: Contact Comrex for more info on this. Q: I notice in the Advanced Options that I can change my streaming from UDP to TCP . Should I? A: Not if you want the best overall performance.
Page 101 What is all this about? Comrex codecs (and many other brands) have a set of nifty protocols that allow easy IP connections between units. So easy, in fact, that we don't even recommend reading this paper unless you have a need to communi- cate with non-Comrex products.
Page 102 It should be noted that several mandatory algorithms like G.711, G.722, and MP2 were included which provide little benefit to IP codec customers. Comrex has declined to include MP2, which makes our codecs technically in violation of the standard. 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 start of an IP codec call.
Page 103 In the case of SIP , this must be three discrete ports (For Comrex codecs these are UDP 5060, 5014 and 5015)<6014 and 6015 with 3.0 firmware>. And since even the "forward address"...
Page 104 IP address is. It does this by contacting a STUN server out on the Internet (the default one is main- tained by Comrex) and simply asking. If this option is enabled, the codec itself will handle the "address" switcheroo.
Page 105 For more information on GPL see http://www.gnu.org. As per the GPL, source code for this software is available on request from Comrex on CD-ROM or other electronic format. To obtain this software please contact our support department at +1 978 784 1776. We retain the right to charge a small handling fee for distribution of this software.
Page 106 All Equipment manufactured by Comrex Corporation is warranted by ArrAnty Comrex against defects in material and workmanship for one year from the date of original purchase, as verified by the return of the warranty regis- tration card. During the warranty period, we will repair or, at our option,...
Page 107 TAL, SPECIAL OR CONSEQUENTIAL DAMAGE RESULTING FROM THE USE OF THE PRODUCT INCLUDING LOSS OF PROFITS, LOSS OF SAV- INGS, LOSS OF USE OR INTERRUPTION OF BUSINESS EVEN IF COMREX CORPORATION OR ANY OF ITS SUPPLIERS HAS BEEN ADVISED OF THE POSSIBILITY OF SAME.
Page 108 If you wish to deploy your own Traversal Server, contact Comrex for details on obtaining this software. Comrex is not liable for training or support in setting up a TS server, and the software is available without warrantee or guarantee of suitability of any kind.
Page 109 Date of Issue: January 23, 2006 Comrex Corporation, located at 19 Pine Road, Devens, MA in the United States of America hereby certifies that the Comrex ACCESS Rack bearing identification number US:DXDMD01BACCRK complies with the Federal Communications Commission’s (“FCC”) Rules and Regulations 47 CFR Part 68, and the Administrative Council on Terminal Attachments (“ACTA”)-...
Page 110 Low Voltage Directive (72/23/EEC) EN 60950-1: 2001 Information regarding configuration of this equipment for operation on the telephone networks of the EC countries may be found in the Comrex ACCESS Rack product manual. Contact person: Thomas O. Hartnett, V .P ., Engineering...
Page 111 RENs, contact the local telephone company. The REN for the Comrex ACCESS Rack is 0.1, and is shown as the digits represented by ## in the product identifier US: DXDMD###ACCRK.
Page 112 If you have specially wired alarm equipment connected to the telephone line, ensure the installation of the Comrex ACCESS Rack does not disable your alarm equipment. If you have questions about what will disable alarm equipment, consult your telephone company or a qualified installer.
Page 113 In order to encode streams that are compatible with these devices, the optional AAC upgrade must be installed on the ACCESS. Contact Comrex for more details. The ACCESS is capable of encoding and decoding a choice of three dif- ferent types of non-ACCESS streams: Standard RTP , Luci Live and Zephyr Xstream.
Page 114 omrex orporation 2) Zephyr Xstream — Xstream Firmware version 3.2.0 and higher sup- port an “RTP Push” function that is compatible with ACCESS in some modes. ACCESS 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 ACCESS is only compatible with the AAC mode...
Page 115 AnAgErS The purpose of this appendix is to describe all open ports and services available on the Comrex ACCESS. If a service is not mentioned here, it is disabled by default. The Comrex ACCESS is a device designed to move real-time, wideband audio over IP networks.
Page 116 DSA key can access SSH services on the device. Other forms of authentication are disabled. This key is kept confidentially by Comrex for factory diagnostics only. SSH services may be disabled completely via the user interface.
Page 117 ACCESS Product Manual ACCESS PPEndIx SIng nIdIrECtIonAl EtWorkS Under most circumstances, ACCESS requires an IP path in both directions for successful connections, even when audio is being sent only one-way. For networks that provide data only in one direction, it is possible to use Standard RTP mode to establish and maintain these links.
Page 118 omrex orporation A remote entry using a unidirectional profile can still utilize the tools IMe or rIggered required for automatic connection. onnectIonS To set up a connection to be "always active" (i.e. reconnect in the case of power outage or network failure), choose that connection on the System Settings Tab as the Always Connect To location.
Page 119 ACCESS Product Manual PPEndIx PECIfICAtIonS Power: IEC 530 Inlet onnectIonS Analog Line In Left/Digital AES3 In: Analog: 3-pin XLR female, pin 1 ground, pin 2 +, pin 3 – Digital: 3-pin XLR female, pin 1 ground, pin 2 data +, pin 3 data – AES 3 Output: 3-pin XLR male, pin 1 ground, pin 2 data +, pin 3 data –...

Comrex ACCESS STEREO BRIC IP Manual

Quick Links

Need help?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Comrex ACCESS STEREO BRIC IP

Summary of Contents for Comrex ACCESS STEREO BRIC IP

Page 7: Ntroduction

Page 10: Escriptions

Page 13: Onnections

Page 30: Rofile S Ettings