kanaitis@cisunx.UUCP ( Kanaitis) (06/24/88)
My company just purchased a few ARK 2.4K Plus Dial modems, which I have installed on our VAX/VMS system. The modems work very well, except for one small problem. We have quite a few old-style Hayes Smartmodem 1200's (the one's with only one phone jack in the back, and a volume knob) that will be dialing into the ARKs. These older hayes modems do not seem to recognize the valid carrier tone on the ARK, when the ARK is set to autobaud down to 1200 baud. Newer Hayes 1200 modems WILL work properly with the ARKs, and the old-style Hayes will work with other 2400 baud modems (such as the Hayes 2400s) on the VAX end. Has anyone ever encountered a similar situation? Any help would be appreciated. Thanks... Pete Kanaitis System Manager Allegheny-Singer Research Institute Pittsburgh, Pennsylvania X979PK0P@VB.CC.CMU.EDU X979PK0P@CMCCVB.Bitnet kanaitis%unix.cis.pittsburgh.edu@VB.CC.CMU.EDU ...!cisunx!kanaitis
cmr@m2-net.UUCP (Chuck Rader) (06/30/88)
Hayes and compatible 1200 bps modems often have problems connecting to certain 2400 bps and Vadic triple 1200 bps modems. The problem can be that the answering modem cycles through the various carrier tones too quickly without staying at one frequency long enough for the Hayes to lock on to it. Try setting the Hayes S-registers to shorten the amount of time the Hayes waits before recognizing a carrier and lengthen the amount of time before it detects a dropped carrier. -- Chuck Rader, Manager, Computer Technical Services, University of Detroit voice: 313-927-1349 I don't worry 'bout a thing 'cause fax: 313-927-1011 I know nuthin's gonna be all right e-mail: cmr%m-net@umix.cc.umich.edu