<PAGE>

                                    ANNEX A-6

                                     FORM OF
                                LOCKUP AGREEMENT
      (FOR NON-EMPLOYEES WITH 5,000 OR MORE SHARES OF TELTECH COMMON STOCK
                          AND NOT SUBJECT TO RULE 145)


Sopheon PLC
Stirling House
Stirling Road
Surrey Research Park
Guildford
Surrey
ENGLAND GU2 5RF

Ladies and Gentlemen:

         The undersigned, a shareholder of Teltech Resource Network Corporation,
a Minnesota corporation ("Teltech"), hereby enters into this Agreement pursuant
to Section 8.3(i) of the Agreement and Plan of Merger and Reorganization dated
as of January 21, 2000, pursuant to which Teltech will merge (the "Merger") with
and into a wholly owned subsidiary of Sopheon PLC, a United Kingdom public
company limited by shares ("Sopheon"). The undersigned will receive shares of
common stock of Sopheon ("Sopheon Shares") in connection with the Merger and
agrees with and represents to Sopheon as follows:

         1.       The undersigned is the holder of and is entitled to vote
                  ___________ shares of the outstanding common stock and ______
                  shares of the outstanding preferred stock of Teltech. Such
                  shares, together with any other voting shares of Teltech
                  acquired by the undersigned after signing this Agreement and
                  before the effective time of the Merger are referred to herein
                  as the "Teltech Shares". The undersigned does not own any
                  other voting shares of Teltech.

         2.       Except with respect to the exchange of Teltech Shares for
                  Sopheon Shares pursuant to the Merger, the undersigned has no
                  current plan or intention to engage in any sale of any Teltech
                  Shares (whether or not acquired pursuant to the exercise of a
                  stock option) on, or prior to, the Merger. The undersigned
                  will immediately notify Sopheon and Teltech in writing via
                  facsimile of any sale of Teltech Shares by the undersigned on,
                  or prior to, the Merger.

         3.       From the date of this Agreement until the effective time of
                  the Merger, the undersigned will not purchase, sell, exchange,
                  transfer, pledge or otherwise trade in Sopheon stock or rights
                  to purchase or sell Sopheon stock. The undersigned understands
                  and agrees that this prohibition against trading in Sopheon
                  stock is a requirement of the Dutch Securities and Exchange
                  Commission and the regulatory bodies of the London Stock
                  Exchange.

<PAGE>

         4.       The undersigned will not, without prior written consent of
                  Sopheon, sell, transfer or otherwise dispose of, or agree to
                  sell, transfer or otherwise dispose of any Sopheon Shares
                  owned by the undersigned, or sell or grant options, rights or
                  warrants with respect to any Sopheon Shares for a period of
                  180 days after the effective date of the Merger, other than by
                  gifts to donees who agree to be bound by the same restriction,
                  or by will or the laws of descent.

         5.       The undersigned will not sell, transfer or otherwise dispose
                  of any Sopheon Shares other than through a broker specified by
                  Sopheon or only after full consultation with such broker.

         6.       This Agreement shall be enforceable by, and shall inure to the
                  benefit of and be binding upon, Sopheon and the undersigned
                  and their respective successors and assigns. With respect to
                  the undersigned, the term "successors and assigns" includes
                  heirs, executors, administrators, trustees and successor
                  trustees, and personal and other representatives. This
                  Agreement shall be governed by and construed, interpreted, and
                  enforced in accordance with the laws of the State of
                  Minnesota, without regard to the conflicts of law provisions
                  thereof.



Dated: ________________, 2000
                                       ----------------------------------------
                                       (Signature)

                                       ----------------------------------------
                                       (Print Name)

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

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

                                       ----------------------------------------
                                       (Address)

                                        2