        #
        | Release Notes
        |
        | MicroLink ISDN/TLV.34
        | (AN 326, AN 778, AN 354)
        |
        | Copyright (c) 1994-98 ELSA AG, Aachen (Germany)
        |
        | ELSA AG                    Internet   : http://www.elsa.de
        | Sonnenweg 11               LocalWeb   : +49-(0)241-938800
        | D-52070 Aachen
        |
        | ELSA Inc.                  Internet   : http://www.elsa.com
        | 2231 Calle De Luna
        | Santa Clara, CA 95054
        | USA
        |
        | ELSA Asia Inc.             Internet   : http://www.elsa.com
        | 7F-11, No. 188, Sec. 5
        | Nanking East Road
        | Taipei 105
        | Taiwan, R. O. C.
        |
        | ELSA Japan Inc.            Internet   : http://www.elsa.com
        | Mita Suzuki Building 3F
        | 5-20-14 Shiba, Minato-ku
        | Tokyo 108-0014
        | Japan
        |
        | 07/22/1998, FMichiel


V2.55 --> V3.00:
================

User Interface
--------------

- The transmission of the own MSN to the public exchange is now 
  also implemented with simultaneous suppression of the MSN 
  shown to the remote side. Therefore, a new command "AT+ICLI=12345/"
  has been defined (12345=originator MSN to be notified to exchange).
  This feature is very useful for separate accounts of private and
  business MSNs without telling the remote side your MSN.


Transfer Protocols
------------------

- The CONNECT problems at V.110 connections to GSM handies has been
  eliminated.

- The Plug & Play detection has been modified for Toshiba laptops.

- An error concerning the establishment of Multilink PPP connection
  on devices with one-channel HSCX chips (only few older devices) has 
  been fixed.


Modem Part
----------

- The voice command online mode (VCON) will now still be active on 
  hang up through the remote side. This mode is only left through
  an "ATH" of the application.

- The auto-answer at data callings in fax class 1 has been improved.

- The accessibility regarding the fax calling center of WinFax PRO 
  8.03 hass been improved.

- The were some minor changes made at disconnection.


Legend:
------
MX	=	Firmware with ELSA channel bundling
MP	=	Firmware with Multilink PPP channel bundling


V2.51 Beta (MP) --> V2.55 (MX + MP):
====================================

User Interface
--------------

- The command ATH1 now returns OK.

- Within the serial V.24 interface between terminal adapter and PC
  the pin RI (ring indicator) now continously toggles the signal
  (1 second on 4 seconds off). (This will be needed for some games.)

- The retransmit timer for X.75 has been increased to 3 seconds. 
  Therefore, the problems with long satellite connections are fixed.


Modem Part
----------

- Adaptive Originate is now implemented.

- The DCD LED (M5) now remains off in voice mode.

- The disconnection of the opposite party will now be notified 
  to the application (DLE/b) even while playing voice messsages.

- Miscellaneous changes have been made to the disconnection of
  (analog) connection.


V2.50 (MP) --> V2.51 Beta (MP):
==============================

User Interface
--------------

- With ATI3 the MX & MP firmware can now be identified through the appended
  letter "X" or "P".
  (Example: "Ver. 2.51K from 02-18-1998 P")

- The maximum length of the dial number has now been increased (from 19) to 
  20 for DSS1 respective (from 35) to 36 for german Nationales ISDN/1TR6.


Transfer Protocols
------------------

- MP firmware: On channel bundling the transfer rate now does not go down
  any more during the transmission of a file.

- MP firmware: Incoming second calls will now be checked regarding Bearer 
  Capability, Called Party Number and Calling Party Number 
  (S register 175, bit 5). Therefore, incoming telephone calls will be
  ignored.

- MP firmware: Incoming second calls will only be accepted if Multilink 
  PPP has been negotiated within the first connection.

- MP firmware: The connection to Shiva stations can now be established
  with normal PAP authentification.

- MP firmware: Miscellaneous minor bugs were fixed.


V2.40 --> V2.50 (MP):
=====================

User Interface
--------------

- With "ATI3" the firmware date will now be displayed with 4 digits
  for the year code.
  Also, the internal date of the firmware will be kept with 4 digits
  for the year code.
- The bitrate detection has been updated again
  (boot problem with Telejet Saferfax fixed, only release K).
- With the AT command "&N1" the Multilink PPP channel bundling can be
  set. The commands "\N10" and "%P1" are also needed for this mode.
  The DCD LED will light orange, if the a Multilink PPP connection
  has been established.


Transfer Protocols
------------------

- Multilink PPP channel bundling is now implemented instead of
  ELSA channel bundling.
- Connects to CompuServe has been approved.


Modem Part
----------

- Analog connects has been approved.


V0.30 (Beta) --> V2.40:
=======================

User Interface
--------------

- The command "AT&V" now shows the right profiles.


Modem Part
----------

- The content of register S229 (byte stream voice data) now remains 
  in the register after "AT&F".

- The command "AT+FK" for fax class 2 and 2.0 is now supported.

- The command "AT#VLS=4" is now supported.

- Miscelaneous bug fixes for the usage of the applications Supervoice/
  Winfax Pro are made.


V2.27 --> V0.30 (Beta):
=======================

User Interface
--------------

- The automatic bitrate detection has been modified again.

- Connections to CompuServe (X.75) has been stabilized.

- The automatic fallback ISDN -> analogue was modified. It now works
  in the Netherlands again.


Modem Part
----------

- The stability in modem operation has been improved 
  (especially in transparent non error corrected mode).

- The commands "AT+FAE" and "AT+FAA" do not automatically set the
  fax class 1/2 any more.

- Miscelaneous bug fixes for the usage of the applications Supervoice/
  Winfax Pro are made.


V2.20 --> V2.27:
================

User Interface
--------------

- The "ATD" command dial string may contain asterisk (*) now (e. g. useful for
  controlling ISDN PBXs).


Modem Part
----------

- The "AT+FCLASS=" command now returns "ERROR" on all invalid parameters.

- When receiving a fax the "+FHNG:" or "+FHS:" response no longer gets lost
  (this bug was located in V2.20).

- The fax commands "AT+FBU=", "AT+FCS?", "AT+FFC=" and "AT+FHS?" have been
  added (completes fax class 2.0).


Transfer Protocols
------------------

- When establishing a V.110 connection the BC/LLC (bearer/low layer
  capability) can be signaled on the D-channel (see register S151 Bit 2 in
  ADDENDUM.DOC, if not yet mentioned in printed manual).


V2.10 --> V2.20:
================

User Interface
--------------

- Wrong bit rate adaption and boot problem on PnP/DTR signal (i.e. when 
  starting a Windows 95 computer) fixed (only hardware release K).

- AT command ATI9 now also returns the serial number (only hardware release K).

- Emails within T-Online can now be sent with attachments.

- CompuServe (CIS) can now be accessed via Datex-J with WINCIM 2.0 and 3.0.

- S register 165 was added, which contains the actual CAPI 2.0 error code.


Modem Part
----------

- The write error REL-LABM during modem connection has been fixed. REL-LAPM
  will be returned now.

- DLE sequences for voice operation now always work. Therefore, Supervoice can
  now be controlled better by using DTMF signals.

- Some control problems in online mode have been fixed. For this reason, 
  corruptions of transmissions like ZMODEM will no longer occure as often.
  This problem especially relates to transmissions with 230.000 bps.

- A fax class 2 or 2.0 connection could not be hang up via the AT command ATH.
  Also the command +FHNG could not hang up automatically. This problem has 
  been fixed and was only detected on a fax connection between two MicroLink
  ISDN/TLV.34.


Transfer Protocols
------------------

- Long asynchronous HDLC packets (longer than 2048 bytes) (i.e. with many 7d's
  as user data) can be handled by the device now.


V1.61 --> V2.10:
================

User Interface
--------------

- The ATI3 command now supports multilingual output of dates and settings.

- In the ATI4 command, the %B26400 entry in the description table has been 
  corrected (was written incorrectly), and the previously missing %7200 
  entry has been added.

- The contents of register S87 is changed at a later time now, causing the
  DCD LED not to change its color any more in case of an incoming call 
  during an existing error-corrected connection on the same S0 bus.


Modem Part
----------

- Analog transfer rates of 31,200 bps and 33,600 bps are now supported.
  (This affects the registers S37 and S87 (18=31200, 19=33600) and the
  CONNECT messages.)

- The command echo settings (S14) are now passed to the modem module,
  causing Fax Class 1 and fax polling to work properly now.

- The DATA or FAX message in Adaptive Answer mode is now evaluated in
  a different way, causing Adaptive Answer to work properly now.

- The two voice commands #vgr and #vgt have been implemented.


Transfer Protocols
------------------

- An error in the HDLC/PPP connection establishment has been fixed. The
  Windows 95 dial-up network now works with HDLC/PPP (\N10%P1).

- If bit S151.1 is set, an LLC is inserted in V.120 mode. This allows
  V.120 connections to CompuServe.


US Protocols
------------

- In outgoing calls using the D-channel protocol NI-1, now the correct
  type of number is issued (instead of "unknown"). Outgoing calls with
  the NYMEX phone company now work properly.


V1.53/1.57 --> V1.61:
=====================

User Interface
--------------

- In T-Online operation the Kit-standard support has now been improved to 
  include EMail sending (as of version 1.57).

- The data transfer rate between the PC and terminal adapter will be
  recognized on entry of the commands "AT" or "A/".  Older versions
  required just the "A". --> Automatic bitrate recognition


Modem Part
----------

- The new register 230 activates/deactivates the in-built mini-loud-
  speaker.  By default, the speaker is inactive, meaning that the speaker
  is switched off for Voice operations.  Setting register 230 to 1
  switches the speaker on (as of version 1.57).

- The command &F restores the fax settings to the standard values.
  Further, the &F command formerly reset the bitrate stored in Register
  S93 to 38,400 bps.  The current bitrate will now be retained.

- The command Z also restores the standard fax settings.

- The use of dialing tone frequencies during voice operations has been
  approved.

- The Modem Connect messages have been revised.


Connections
-----------

- Semi-permanent connections (leased-lines) can now be operated with 
  channel bundling.
