        # 
        | Release Notes
        |
        | MicroLink ISDN/TLpro
        | (AN 409, AN 203, AN 353, AN 776)
        |
        | 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).


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 contain the actual CAPI 2.0 error code.


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.

- 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.


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
--------------

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

- In T-Online operation the Kit-standard support has now been improved to 
  nclude 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


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

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

