Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!uunet!ispi!jbayer From: jbayer@ispi.UUCP (Jonathan Bayer) Newsgroups: comp.dcom.modems Subject: Re: hi speed modems in Germany Message-ID: <564@ispi.UUCP> Date: 26 Mar 89 17:09:53 GMT References: <4377@drivax.DRI> <1445@altger.UUCP> <729@impch.UUCP> Reply-To: jbayer@ispi.UUCP (Jonathan Bayer) Organization: Intelligent Software Products, Inc. Lines: 42 In article <729@impch.UUCP> patg@impch.UUCP (Patrick Guelat) writes: > >I think there is an undocumented register in v4.0 of the firmware, that allows >you to disable the little packets (the ones for interactive use). As far as I >can remeber it's register 120 that allows you to set different packet modes. >Possibly you have to set 120=2 to allow long packets only, but I'm not >sure.. Perhaps telebit can answer this and tell us if there are other >undocumented registers. I was recently talking with Bob Boynton at Telebit, and the subject of my problems connecting with UUNET over the 800 lines came up. He described register s120, and suggested I try setting it to 2. I did, and all my problems went away. I have included a short description of the register below. It is a bit-mapped register, and using other values won't do anything. Bob said that using a value of 2 might come up with a net loss of about 15% throughput, however I have not noticed any reduction. s120= 0 when modems connect, and exchange info, will attempt to connect at the shortest possible packet 12 forces modem to abondon micropacket (faster on long distance lines) 2 long packets A suggestion he suggested was to turning the speaker on at all times (atm2). If you hear a lot of retrains (period of silence followed by re-syncing sound heard upon initial connect) then try setting s120=2. JB -- Jonathan Bayer Beware: The light at the end of the Intelligent Software Products, Inc. tunnel may be an oncoming dragon 19 Virginia Ave. ...uunet!ispi!jbayer Rockville Centre, NY 11570 (516) 766-2867 jbayer@ispi.UUCP