Z y X E L Frequently Asked Questions List Last Modified: March 21st, 1993 Archived at: ftp.cs.psu.edu in /pub/fenner/ZyXEL Please mail any additions to: mckeeveb@sfu.ca *------------------------------------------------------------------------------* ZyXEL Tech support BBS/voice numbers: ZyXEL, Taiwan BBS: 886-35-787045 Voice: 886-35-783942 FAX: 886-35-782439 TCL Technology, Hong Kong BBS: (852) 574-6040 Voice: (852) 891-3281 FAX: (852) 891-6335 ZyXEL, USA (formerly 0/1 Networking) BBS: (714) 693-0762 Voice: (714) 693-0808 or: (800) 255-4101 (Works in Canada) FAX: (714) 693-8811 OCOMP Optimizing COMPuters, Canada Voice: (416) 534-1508 E-Mail: gvb@telly.on.ca *------------------------------------------------------------------------------* Mail servers known to carry ZyXEL info: questor.org send mail to 'mail-server@questor.org' with a body of 'HELP' to get instructions *------------------------------------------------------------------------------* Known mailing lists dealing with ZyXEL modems: zyxel-programmers@sfu.ca Please send all subscription/cancellation requests to owner-zyxel-programmers@sfu.ca *------------------------------------------------------------------------------* Latest official ROM release(s): 6.00 available only for 1-Mbit EPROMs 5.05m available for 1-Mbit and 512-Kbit EPROMs (really old non-plus models) Beta ROMs have been known to ship in modems supplied by ZyXEL USA, so you may have a newer version than those listed here. *------------------------------------------------------------------------------* Where to get EPROMs to update modem ROMs: Almost any major electronics supplier should be able to get the needed parts. You'll also need access to an (E)PROM burner capable of burning 1-Mbit PROMs. Shop around for your EPROMs, as prices can vary drastically. EPROMs can also be purchased pre-programmed direct from ZyXEL and from the Questor Project (see company directory at the end) NOTE: Radio Sharck doesn't count as a major electronics dealer. Part number to get: 27C010 1-Mbit EPROM 27C512 512-Kbit EPROM (really old non-plus's) 120ns or faster ROMs are recommended for non-plus model modems. 100ns or faster ROMs are recommended for plus model modems. 150ns ROMs have been known to work, but are definitely not advised. Note for the inexperienced: Using faster ROMs will not make your modem go faster. The speeds recommended are those found to provide good reliability and operation and getting faster ones will not provide any further speed enhancement. Note for the lazy: I have just purchased a large quantity of 27C010's and would be willing to sell some at a reasonable price (plus shipping) for those who don't want to shop around. E-mail me for details (mckeeveb@sfu.ca) (I'd even be willing to have them burned for a few bucks more) *------------------------------------------------------------------------------* Modifications for EPG optionfor S/S+ models: This modification enables the 3 pins next to the power connector for the connection of an oscilliscope to view an eye pattern for line diagnostics. Note: these 2 chips are CMOS devices and are static sensitive. Use suitable caution. chip Number Part Number Manufacturer Description --------------------------------------------------------------------- U11 AD7528JN (Analog Devices) 8-bit buffered DAC U12 TL072CP Texas Instruments 2 x FET op-amp *------------------------------------------------------------------------------* Changing Country Codes: These steps allow you to change the the line interface to match those used/required for operation in various countries. Type: ats38=2 at#g123 where 123 is the country code desired. at&w to save these settings Probably best to power-cycle the modem at this point at#h to get current country code (North America = 255) *------------------------------------------------------------------------------* Known country codes: Austria: 233 Japan: 234 North America: 255 If you know of any other country codes, please mail them to me (mckeeveb@sfu.ca) for inclusion in a future version of this FAQ. *------------------------------------------------------------------------------* ZyXEL power supply: ZyXEL uses a transformer that puts out 20VAC, 900mA with a center tap The transformer should ideally have output between 50 Hz and 60 Hz. +-----+ AC --> | o o | <-- AC \ o / --- ^ +-- Center tap *------------------------------------------------------------------------------* Making Caller ID (CID/CND) Work right: Way back in September, ZyXEL released a note (now disappeared off my drives) which described the use of the S45 and S46 registers to set timing. They (wrongly) assumed that the ringing on the GTD-5 exchanges was exactly 1.75s, following by 50ms silence, then data; for DMS-100 as a 2s - 3.5s ring interval, followed by 500ms of silence. The CallerID length depends on the amount of data the exchange transmits as its message. ***********************-----++++++++++++++++++ ^ ^ ^ | | | Ring Silence CallerID Data I quote from their message: << It is difficult for the modem to receive CallerID signals for both exchanges without configurable parameters. Two new parameters are implemented for this purpose, S45 and S46. They are called "guard time" and "silence interval", respectively. The silence interval is the consecutive silence that the modem should detect after ring on before CallerID signal to be processed. Distinctive ringing may be combined with CallerID, and therefore a guard time is needed for the modem to inhibit the silence detection. Registers S45 and S46 are in units of 20ms. Default setttings should be in the range of S45=100, S46=28 for DMS-100 (Bell, Northern), and possibly S45=87 and S46=3 for GTD-5 switches. >> The place this argument falls down, is on the GTD-5 switch, where they use "flash ringing". Flash ringing starts at any point in the ring cycle, which means you can get anywhere from 0.1s up to 2.0s of ringing current before the 50ms silent period followed by data from the central office switch. In any event, you now have the parameters for the critical registers for CallerID, for whatever good it may do you. *------------------------------------------------------------------------------* FTP servers known to Carry ZyXEL info: ftp.csie.nctu.edu.tw mirror of ZyXEL (Taiwan) BBS cca.camb.com Mirror of ftp.csie.nctu.edu.tw grind.isca.uiowa.edu Look in /info/ZyXEL iacrs1.unibe.ch Look in /pub/ZyXEL another mirror of ZyXEL, Taiwan faramir.informatik.uni-oldenburg.de Look in /pub/amiga/incoming/zyxel pretty much a mirror of ROM images, etc. abdallah.cd.chalmers.se Same info as above sites, with more files from ZyXEL, USA BBS ftp.luth.se ROM images, files, info, etc. Look in /pub/misc/zyxel dsrbg2.informatik.tu-muenchen.de Look in /physik/ZyXEL Contents similar to above site. ftp.cs.psu.edu Look in /pub/fenner/ZyXEL Owner says: odd tibits, etc. Usually no ROM images. rusmv1.rus.uni-stuttgart.de Look in /pub/soft/pc/comm/zyxel sgi.com Look in /sgi/modems Contains file called: fix-zyxel (mirrored on wuarchive.wustl.edu) Replacement files for /usr/lib/uucp and /etc (gettydefs) to use ZyXELs Look in /sgi/fax Contains FlexFAX software (V 2.0b22) shape.mps.ohio-state.edu Look in pub/netfax-zyxel Contains netfax patches for ZyXELs 129.26.9.88 (name unknown) Look in /usr/pub/zyxel Contains beta version of PD voicemail program for PC quepasa.cs.tu-berlin.de Look in /pub/atari/modem File called: zyxelinf.lzh Host sun.rz.tu-clausthal.de Look in /pub/atari/telecomm File called: zyxelinf.lzh ********************** MAC FILES... FILE: ara-zyxel-u1496e.hqx biom3.univ-lyon1.fr (134.214.100.42) Location: /pub/mac/comm akiu.gw.tohoku.ac.jp (130.34.8.9) Location: /pub/mac/comm/CTB uhunix2.uhcc.hawaii.edu (128.171.44.7) Location: /mirrors/info-mac/comm wuarchive.wustl.edu (128.252.135.4) Location: /mirrors2/info-mac/comm utsun.s.u-tokyo.ac.jp (133.11.11.11) Location: /ftpsync/info-mac/comm sumex-aim.stanford.edu (36.44.0.6) Location: /Volume1/info-mac/comm sics.se (192.16.123.90) Location: /pub/info-mac/comm pinus.slu.se (130.238.98.11) Location: /pub/mac/comm sally.informatik.rwth-aachen.de (137.226.112.172) Location: /pub/rz.archiv/simtel/info-mac/comm swdsrv.edvz.univie.ac.at (131.130.1.4) Location: /mac/info-mac/comm ftp.uu.net (137.39.1.9) Location: /systems/mac/info-mac/comm lth.se (130.235.20.3) Location: /pub/mac/info-mac/comm metten.fenk.wau.nl (137.224.129.4) Location: /info-mac/comm nic.switch.ch (130.59.1.40) Location: /mirror/info-mac/comm ********************** FILE: zyxel.sit.hqx wuarchive.wustl.edu (128.252.135.4) Location: /mirrors3/archive.umich.edu/mac/util/comm/ara garbo.uwasa.fi (128.214.87.1) Location: /mirror/umich.macarchive/util/comm/ara ********************** FILE: ara-zyxel-u1496.hqx akiu.gw.tohoku.ac.jp (130.34.8.9) Location: /pub/mac/comm/CTB uhunix2.uhcc.hawaii.edu (128.171.44.7) Location: /mirrors/info-mac/comm wuarchive.wustl.edu (128.252.135.4) Location: /mirrors2/info-mac/comm sumex-aim.stanford.edu (36.44.0.6) Location: /Volume1/info-mac/comm ********************* MISC. MACINTOSH FILES... wuarchive.wustl.edu (128.252.135.4) Location: /mirrors3/archive.umich.edu/mac/util/comm/ara FILE: zyxelu1496.sit.hqx pollux.lu.se (130.235.132.89) Location: /pub/mac/comm FILE: ara-zyxel-u1496.cpt.hqx garbo.uwasa.fi (128.214.87.1) Location: /mirror/umich.macarchive/util/comm FILE: comm/arazyxel.sit.hqx *------------------------------------------------------------------------------* Mailorder Firms that carrying ZyXEL equipment: Black & White Software (802) 496-5113 Contact: Craig Goss Boston Computer (617) 551-0166 Contact: Sheri Hamel CTS (615) 966-3667 Eagle Computing (302) 657-9303 Contact: Chris Pyrros, pyrros@cis.udel.edu Golden Everstar (714) 594-4168 GPSoftware, Australia 61-7-366-1402 (FAX and voice) Contact: Greg Perry, gregp@gpsoft.adsp.sub.org Information Technology Services, RPI (518) 271-2473 Contact: Daniel Ling Kandy Shack (800) 638-1170 (714) 636-2667 (BBS - 10 lines) Contact: Mike Bernstein Micro Logic Limited, New Zeland 64-9-309-3135 64-9-309-3195 (FAX) Contact: Barney Campbell MLM Computers and Consulting (607) 256-2933 Contact: Mark Margolis OCOMP Optimizing Computers (416) 534-1508 Contact: George Vande Bunte, gvb@telly.on.ca SI Services (215) 675-7507 Contact: Joshua Alder Sondos Communications (800) 955-5000 (800) 365-4223 Contact: Steve (Note: formerly known as Alpine Communications) Sparco Computers (601) 323-5360 (601) 324-6433 (FAX) Contact: Mubashir Cheema, mac1@ra.msstate.edu Sparco will sell these modems in quantity The Questor Project (604) 682-6659 (604) 682-6160 (FAX) (604) 681-0670 (BBS) Contact: Steve Pershing, sp@questor.org Questor will sell these modems in quantity ZyXEL USA (800) 255-4101 (714) 693-0808 Contact: Sales Dept. And, Barton F. Bruce (Barton.Bruce@camb.com) will sell them in quantity. *------------------------------------------------------------------------------* Patching GNU's NetFax to work with ZyXELs: Receiving: Receiving works flawlessly, PROVIDED that you convince Netfax to send 0x12 instead of 0x11 to the Zyxel when starting to receive a new page. Apparently the standard changed this over two years ago, and most other modems still also accept 0x11 as a compatibility kludge. Sending: The key to sending multiple pages is to throw out AT+FDT=a,b,c,d and replace it with AT+FDT, and to set the desired parameters in a AT+FDCC=a,b,c,d,e,f,g,h message sent when starting up. A pre-made set of patches is available from ftp.cs.psu.edu:/pub/fenner/ZyXEL as a file called netfax.patches *------------------------------------------------------------------------------* Information on ZyXEL's CELP compression mode for voice: CELP compression is currently available only on plus model modems. Unfortunately, ZyXEl has not published any information regarding the manual decodeing/encoding using this method. Some related material is available from the following sources: TITLE="Coded-Excited Linear Prediction (CELP): High-Quality Speech at Very Low Bit Rates" AUTHOR="M. R. Schroeder and B. S. Atal" BOOKTITLE="Proc. IEEE Int'l Conf. on Acoust., Speech and Signal Processing" YEAR="1985" PAGES="937-940" MONTH="April" *------------------------------------------------------------------------------* $