        # 
        | Release Notes
        |
        | MicroLink ISDN/TLV.34
        | (AN 326, AN 778, AN 354)
        |
        | Copyright (c) 1997 ELSA GmbH, Aachen (Germany)
        |
        |                                     Subsidiary:
        | ELSA GmbH                           ELSA Inc.
        | Sonnenweg 11                        2150 Trade Zone Blvd.
        | D-52070 Aachen                      Suite 101
        | Germany                             San Jose, CA 95131
        |                                     USA
        |
        | Phone      : +49-241-606-0          Phone: +1-408-935-0350
        | Support Fax: +49-241-606-6499       Phone:  1-800-272-ELSA
        | BBS (modem): +49-241-606-9800       Fax  : +1-408-935-0370
        | BBS (ISDN) : +49-241-606-9820       BBS  : +1-408-935-0380
        | CompuServe : GO ELSA                CIS  : GO ELSA
        | WWW        : http://www.elsa.de     WWW  : http://www.elsa.com
        |
        | 05/23/97, FMichiel


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.
