CUSIP No. 232565101 EXHIBIT 99.5 We, the undersigned, hereby express our agreement that the attached Schedule 13D is filed on behalf of each of us. Date: September 17, 1997 YOSSI TULPAN By: /s/ Yossi Tulpan ----------------------------- Yossi Tulpan...

CUSIP No. 000000000
                                  EXHIBIT 99.5


We, the undersigned, hereby express our agreement that the attached Schedule 13D
is filed on behalf of each of us.

Date: September 17, 1997

XXXXX XXXXXX


By:      /s/ Xxxxx Xxxxxx
     -----------------------------
         Xxxxx Xxxxxx

XXXX FIAT


By:      /s/ Xxxx Xxxx
     -----------------------------
         Xxxx Fiat

XXXXX XXXXX


By:      /s/ Xxxxx Xxxxx
     -----------------------------
         Xxxxx Xxxxx

KOOR CAPITAL MARKETS


By:      /s/  Xxxxxx Xxxxxxxxx
     -----------------------------
         Xxxxxx Xxxxxxxxx, President


By:      /s/  Xxxx Na'xxxx
     -----------------------------
         Xxxx Na'xxxx, Director

TELRAD HOLDINGS LTD.


By:      /s/  Xxxx Xxxxxxxxxxx
     ---------------------------------------
         Xxxx Xxxxxxxxxxx, Managing Director