OPTICODEC 7600 History
[Changes since V5.01.26 (Beta) 29.11.2006 ]

SYSTEM V5.05.68
Released 06.10.2008
Bugfixes:
  • 4SB ADPCM didn't work.
  • 44.1 kHz sampling for audio over IP connections didn't  work on some units.
SYSTEM V5.05.66
Released 05.09.2008
New features:
  • Added parameter Thold for X.21-Backup. This is the minimum backup time before the unit switches back to X.21/V.35.
  • Added additional confirmation prompt in RESET CONFIGURATION which asks if the IP settings should also be deleted.
  • Added RTSP protocol for IP connections from/to a Darwin server.
  • For incoming Point To Point connections the bitrate is now taken from the accept configurations. It is therefore possible to use different bitrates for both directions.
  • The buzzer now also signals incoming IP connections.
  • Added linear audio with 8-, 12-,16-, 20- and 24-Bit for IP connections and Codecloop.
  • IP Point To Point connections can now also use G.711 and G.722
  • Added Point to Multipoint connections with TCP.
  • Added help text for X.21- and V.35-Interfaces.
  • Added predialing for outgoing ISDN calls.
  • Added predialing completion for incoming ISDN calls (only for units with IMD4-Modules)
  • Added support for V.35-Modules
  • Added STUN for SIP connections. The external IP address of the unit can additionally be entered in the SYSTEM SETUP if no STUN server is available.
  • Added support for SIP-Registrars
  • Auto disconnect function can now be disabled for RTP connections without SIP.
  • Added sync flag for X.21 Linear audio.
  • The X.21-Backup now also controls the X.21 clock for accuracy.
Improvements:
  • More stability for TCP connections on lines with transmission errors.
  • Increased buffer size for MPEG IP connections.
  • Improved auto detect of the communication modules.
  • Jitter of RTP and SIP/RTP reduced.
  • Improved Icecast/Shoutcast compatibility as transmitter.
  • Response packets for remote control via IP are now transmitted to the address and port of the sender and not to the address found in the header of the packets.
  • Block size for RTP and SIP/RTP with G.711 or G.722 was reduced from 288 bytes to 160 bytes.
Bugfixes:
  • Possibility of a software update failing when using the serial port.
  • If the unit was in the main menu for a longer period of time without a connection, it was possible that the level meter would not work during the next connection. This was possible in a connection of more than 75 hours and likely at the latest after 25 days.
  • If a unit with no connection would receive a disconnect command on the remote control interface, the next connection would be disconnected immediately.
  • SPID numbers were only supported on the first ISDN module.
  • In the ISDN accept configuration it was only possible to change the sampling rate when the algorithm was set to AUTO.
  • The alarm control interface sometimes received disturbing signals.
  • When using Zephyr or Prima ISDN sync, it was possible that the connection failed because of a wrong encoder configuration.
  • Redialing would sometimes stop or initiate the restart of the unit.
  • If the redialing of a connection took more than 120 seconds, redialing would be stopped.
  • If an ISDN connection with MPEG would follow after an IP connection with MPEG, the delay would take the same length of time.
  • The unit would sometimes not detect the ISDN modules during boot-up.
  • SIP/RTP connections with G.711 were always made with aLaw regardless of whether aLaw or uLaw was requested.
  • Units with more than one ISDN card would not be able to establish a new connection if there was an error on the second or third ISDN line during the last call.
  • The unit would ignore the loss of one b-channel during a connection using more than one b-channel. This would result in a faulty ISDN connection.
  • Connection error codes were not reported in the NET_REMUNITSTATE message for IP remote control.
  • The fallback time of the level meter was too slow.
  • In units with three ISDN modules, the repeated use of the quick dial function would delete the last dialed numbers.
  • When using ISDN with AUTO sync, a G.722-SRT connection would not transmit and only receive.
  • On certain SIP/RTP connections the RTP data would be sent to the wrong IP address.
  • After the reinitializing of the AES output, the identification in the data stream would be set to 48 kHz regardless of the frequency of the clock on the external sync input.
  • If the X.21 clock was incorrectly set during the start of an X.21 connection, the connection would work after correction of the X.21 but the error indicator would still be active.
  • During an X.21 connection the bitrate could not be changed from a fixed setting to AUTO.
SYSTEM V5.04.51
Released 03.09.2007
Improvements:
  • Incoming RTP calls will now use AUTO for algorithm. So it is possible to use Layer2 for both directions.
Bugfixes:
  • During an existing connection the unit has accepted incoming IP calls which have interrupted the existing connection.
  • To change the settings of the audio ports for TCP and RTP it was necessary to restart the unit.
  • When audio mode was set to AUTO and the other codec changes between stereo and joint stereo this was correctly ignored, but the encoder was reconfigured when the other codec has changed back to the previous setting. This has caused a drop out. The reason is, that the Layer2 encoder changes automatically between stereo and joint stereo depending on the audio signal so this bug could cause a lot of dropouts in a short time.
SYSTEM V5.04.50
Released 29.08.2007
New features:
  • It is now possible to do audio connections over IP with TCP, RTP and SIP/RTP.
  • In a hidden menu it is possible to change the link speed of the network interface.
  • Help system in system setup activated.
  • Network interface can now be set up with DHCP. This will setup IP-address, subnet mask, default gateway and name server.
  • It is now possible to disable the network interface.
  • Added web interface to start and stop connections and for software updates.
  • ACI dialing can now be changed between level and pulse mode. Level modes needs an activated signal during the connection, pulse mode reacts on the rising edge of the signal. For this mode there is a separate pin to disconnect.
Improvements:
  • When the telephone book was sent via remote to the unit all entries without a number had been set to codecloop. The entry is now set to ISDN.
  • ACI signals where now also processed during connect and disconnect.
Bugfixes:
  • On some PBX it was possible that the unit has shown the number of the last connection.
  • The unit has used wrong numbers for comparison if TEST CALLED NUMBERS was activated.
  • On the IP remote interface the unit has shown sometimes wrong values for redialing.
  • In the header of the messages of the IP remote interface the IP address of the unit was sent in wrong format.
  • The messages for ErrorCode and ErrorFlag have not been sent over the IP remote interface.
  • After establishing a connection the unit has reported the configuration of the last connection on the remote interface.
  • When headroom was shown in the level meter 'dB' was missing.
  • When the encoder settings where changed via remote the unit has not shown the new configuration in the display. After changing the algorithm the scale of the level meter was missing.
  • When a call was started the unit had sometimes reported the number of the last connection on the remote interface.
  • Every time when the main menu was shown the RS232 remote interface was set to 9600 Baud. Due to this bug the remote control software has shown “Timeout” for a short time.
  • When changing the settings for userdata it was possible to create a invalid combination of algorithm, bitrate and userdata and the encoder has stopped sending.
  • When the decoder has lost its sync for a short time the sync flag of the decoder in the remote unit was not longer shown. This happend most times directly after the call has been established.
  • When using more than one ISDN line the unit has shown the ISDN number of the last line and not the number of the first line.
  • The flag on the remote interface which shows an active or passive connection was not set.
SYSTEM V5.03.39
Released 20.03.2007
New features:
  • Added support for the third ISDN module.
  • Added linear audio via X.21 with 1920 kbps / 48 kHz.
  • New menu for X.21 in the system setup. Here the clock and data of the X.21 interface can be inverted independently.
  • Remote control via IP can now be disabled by setting the system setup entry REMOTE CONTROL PORT to 0.
  • The network interface can now be disabled by setting the local IP to 0.0.0.0. With the new bootsoftware the hardware will also set to standby in this case.
  • Entering 77777 in the main menu will show all settings of the network interface including the MAC address.
Improvements:
  • If the encoder setting in X.21 mode does not match with the X.21 clock the error message "Invalid X.21 clock" is shown and additionally the unit also shows now the measured frequency of the X.21 clock.
  • The level meter has now a resolution of 0.25 dB for all algorithms.
  • Deleting the local IP address of the unit will now also delete subnetmask and gateway.
  • When entering an IP address and a subnetmask of 0.0.0.0 then the subnetmask will be generated from the IP address.
  • Heavy traffic on the network interface during boot of the unit could result in a much longer boot time and some times in an error message during the DSP RAM test. This has now no influence on the boot time.
  • Added a timeout while establishing a call. If the call was not successful during 120 seconds then the call will be terminated with the error message "Internal Timeout".
Bugfixes:

  • The information for level meter and redialing was missing on the RS232 interface.
  • G.722 was disabled by mistake for X.21.
  • AES receiver will be reinitialized when loosing the input signal. Notches occurring in the frequency response and spurious tones being generated in response to some input frequencies where the result of the missing reinitialization.
  • The audio input which is used for the direct call buttons will now taken from the ISDN accept configuration and is not longer fixed to the analog input.
  • After establishing a call the encoder was reloaded regardless although the correct encoder was still running. This results in a longer drop out direct after establishing the call.
  • The encoder has started transmission of audio data before the encoder was set to the desired configuration. This may result in compatibility problems with other codecs.
  • The local number was not sent to the ISDN during an ISDN call.
  • Changes on the setting for the remote control port for IP was not adopted without a restart of the unit when the setting was changed via remote control.
  • When a DSP was reloaded for a several thousand times it was not longer possible to reload the DSP again. As a result of this the DSP was not running anymore.
  • It was possible that the unit crashed during boot when the network was connected to the unit, especially with heavy traffic on the ethernet.
  • With more than one ISDN module it was possible that the initialization was terminated after the first module was detected. As a result of this not all modules were detected.
SYSTEM V5.02.29
Released 11.01.2007
New features:

  • Added support for ACI modules.
  • Added support for ancillary data.
  • X.21 backup added.
  • Restart of the unit when pressing the keys 3+6+9.
  • Menu changes for units without ISDN (e.g. X.21 units).
Improvements:
  • Improved compatibility to other codecs.
  • If there are more than one ACI signal with the same number then the configuration will also checked, so the correct ACI signal will be switched on for incoming calls.
  • An ACI signal will be only activated if the decoder is synchronized.
  • If the remote unit does not send an ISDN number then 'ISDN' will be shown in the display.
  • If an interface module is not responding during start of the unit then an error message will be shown.
Bugfixes:
  • Sometimes the audio signal was distorted when using G.722.
  • In all menus where the button F1 was normally not used this button will now work as a 'confirm' button. In the number list F1 has worked in the same way as HangUp -> Cancel.
  • After a codecloop an ISDN connection did not work anymore.
  • After changing the local IP address it was necessary to restart the unit.
  • For remote control a combination of number and name was shown, if the number was in the telephone book (The same text which is shown in the display below the level meter).
SYSTEM V5.01.26 (Beta)
Released 29.11.2006
New features:
  • Added support for X.21 modules.
  • External sync input for AES output activated.
  • Established configurations can now be reconfigured via remote (NetControl, OCRemote).
Improvements:
  • If AES input is chosen and no input signal is connected then the unit will show this in the display.
  • Improved compatibility to other codecs.
Bugfixes:
  • After a software update the unit restarts now automatically.
  • Clip indicator during a connection is now working.
  • Sometimes ISDN modules where not detected during start of the unit and sometimes messages from the modules regarding the connection status where lost.
  • Configuration of the status LEDs in the ethernet connector corrected: Yellow shows link OK, green shows Rx and Tx activity.
  • When the MPEG decoder has no sync the level meter now shows correctly -80 dBu instead of -27.5 dBu.
  • Without ACI interface the unit has random ACI signals transmitted to the remote units.
  • While establishing a connection the unit could freeze for a few seconds.
  • Incoming telephone calls where sometimes detected as data calls.
  • Between two OC7600 the decoder syncflag was not transmitted correctly to the remote unit.
  • Keyboard inquiry optimized because of occasionally keybounce.
  • Wrong configuration of AES input and output when encoder and decoder were working with different sampling frequencies.
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