I88OMNI128LIDSL Modem With ISDN and Serial Interface

Safety & Compliance Consulting 29 Sweetman Lane West Milford, NJ 07480-2932 Tel/Fax (973) 728-5141 December 17, 1999 QTK99-F041 731 Confirmation Number EA96296 Federal Communications Commission Equipment Approval Services P.O. Box 358315 Pittsburgh, PA 15251-5315 Subject:Original Application for Class B Computing Peripheral FCC ID: I88OMNI128L / ISDN External Modem Gentlemen: Enclosed, please find ZyXel Communications Corporation’s application for equipment authorization dated December 17, 1999. The subject device is in compliance with Part 15, Subpart B of the FCC Rules. This device is a 64K/128K external ISDN Modem provided with RS-232 serial interface port and RJ-45 jack for connection to host PC and local area network (LAN) for data operation with speeds up to 64 and 128 kbps. This device contains ASIC type PED8191 with 61.44 MHz frequency crystal and is provided with ZyXel Direct Plug-In AC Adaptor, model MW48-1801000UA. This EUT was network system tested while connected to host PC and remote PC by LAN network while in highest data operation speed of 128 kbps. Tests were performed in accordance with ANSI C63.4-1992 to show compliance to CISPR 22 Class B limits. Should you have any questions or comments, please contact the undersigned. Thank you for your attention and cooperation in this matter. Sincerely yours, Richard Mullen Manager Safety & Compliance Consulting

QuieTek CorporationPage: 1 of 4 FCC Report No.: 99CH001FI Accredited Lab. of NVLAP(NIST) NVLAP Lab. Code : 200347-0 EMC Test LaboratoryRev.1 Attachment 3 : EUT Detail Photographs (1)EUT Photo (2)EUT Photo QuieTek CorporationPage: 2 of 4 FCC Report No.: 99CH001FI Accredited Lab. of NVLAP(NIST) NVLAP Lab. Code : 200347-0 EMC Test LaboratoryRev.1 (3)EUT Photo QuieTek CorporationPage: 3 of 4 FCC Report No.: 99CH001FI Accredited Lab. of NVLAP(NIST) NVLAP Lab. Code : 200347-0 EMC Test LaboratoryRev.1 (4)EUT Photo QuieTek CorporationPage: 4 of 4 FCC Report No.: 99CH001FI Accredited Lab. of NVLAP(NIST) NVLAP Lab. Code : 200347-0 EMC Test LaboratoryRev.1 (5)EUT Photo

QuieTek CorporationPage: 1 of 2 FCC Report No.: 99CH001FI Accredited Lab. of NVLAP(NIST) NVLAP Lab. Code : 200347-0 EMC Test LaboratoryRev.1 Attachment 2: EUT Test Setup Photos Front View of Conducted Test (Mode 1) Back View of Conducted Test ( Mode 1) QuieTek CorporationPage: 2 of 2 FCC Report No.: 99CH001FI Accredited Lab. of NVLAP(NIST) NVLAP Lab. Code : 200347-0 EMC Test LaboratoryRev.1 Front View of Radiated Test (Mode 1) Back View of Radiated Test (Mode 1)