thanx for all of you who helped me. We solved the problem. For those who wish to use TWJ(Japan Teleway), the setting you MUST use is basic-5ESS, or point to point as suposed to mutlipoint. NO SPID. I have learnd a lot from you guys about ISDN. tatsuya = = = = = = Business Network Telecom (BNT) ビジネスネットワークテレコム株式会社 〒111-0053　東京都台東区浅草橋3-8-5 31山京ビル6階 TEL 03-5687-3945 FAX 03-5687-6009 http://www.giganet.net