lar@pc.usl.edu (Robert, Lane A.) (05/14/91)
In article <RU9BCJ6@xds13.ferranti.com> peter@ficc.ferranti.com (Peter da Silva) writes: Well, I've had some problems with modems with MNP enabled, to the point where I generally don't turn it on. I've been typing away, for example, and all of a sudden the modem (an Everex) would lock up and quit talking. The TR light would be slowly blinking, and the only way out of this condition was to hang up and try again. The same thing happens to my 2 1/2 year old Everex 2400 every now and then, but in my case it's the MR light that blinks. I can still get its attention with +++, but the only command that will unwedge it is ATZ, which also drops the connection. Annoying. This has happened with and without MNP, so I suspect that you'll be seeing it again even if you never enable MNP. If anyone from Everex is out there and knows what is going on here, the information would be very much appreciated. Lane lar@usl.edu
tnixon@hayes.uucp (05/15/91)
In article <LAR.91May14100256@pc.usl.edu>, lar@pc.usl.edu (Robert, Lane A.) writes: > The same thing happens to my 2 1/2 year old Everex 2400 every now and > then, but in my case it's the MR light that blinks. I can still get > its attention with +++, but the only command that will unwedge it is > ATZ, which also drops the connection. Annoying. This has happened > with and without MNP, so I suspect that you'll be seeing it again even > if you never enable MNP. If anyone from Everex is out there and knows > what is going on here, the information would be very much appreciated. I can only tell you about Hayes modems, but it's possible that Everex behaves the same way. The symptom of the MR light blinking while online and "locking up" the modem happens when the modem THINKS it has seen a "Remote Digital Loopback Request" from the other modem. This request is a particular signal pattern, and it is POSSIBLE for line noise to cause the modem to think it has seen this signal. The modem thus enters Remote Loopback state, which is indicated by the light blinking. Since 99.99% of users NEVER intentionally want to be in Remote Loopback state, the best thing to do is to disable granting of remote loopback requests. This is accomplished by the &T5 command, which can be written to non-volatile memory. But the &F factory default is &T4, so if you have programs that force an &F to the modem, you'll need to include an &T5 in those initialization strings to keep granting of remote loopback requests disabled. AT&T5&W is always one of the first things I do to a new modem out of the box! -- Toby -- Toby Nixon, Principal Engineer | Voice +1-404-840-9200 Telex 151243420 Hayes Microcomputer Products Inc. | Fax +1-404-447-0178 CIS 70271,404 P.O. Box 105203 | UUCP uunet!hayes!tnixon AT&T !tnixon Atlanta, Georgia 30348 USA | Internet hayes!tnixon@uunet.uu.net
peter@ficc.ferranti.com (Peter da Silva) (05/15/91)
I said: > a sudden the modem (an Everex) would lock up and quit talking. The TR light > would be slowly blinking, and the only way out was to hang up and retry. lar@usl.edu (Robert, Lane A.) responds: > The same thing happens to my 2 1/2 year old Everex 2400 every now and > then, but in my case it's the MR light that blinks. You're right, it's the MR light. But it's not happened to me yet when I didn't have MNP enabled. Could be a coincidence. In any case, I'm not using that modem any longer. -- Peter da Silva; Ferranti International Controls Corporation; +1 713 274 5180; Sugar Land, TX 77487-5012; `-_-' "Have you hugged your wolf, today?"
cg108dbd@icogsci1.ucsd.edu (Steve -Social Hacker) (05/16/91)
On 15 May 91 13:43:55 GMT, peter@ficc.ferranti.com (Peter da Silva) said: Peter> I said: > a sudden the modem (an Everex) would lock up and quit talking. The TR light > would be slowly blinking, and the only way out was to hang up and retry. Peter> lar@usl.edu (Robert, Lane A.) responds: > The same thing happens to my 2 1/2 year old Everex 2400 every now and > then, but in my case it's the MR light that blinks. Peter> You're right, it's the MR light. But it's not happened to me yet when I Peter> didn't have MNP enabled. Could be a coincidence. In any case, I'm not Peter> using that modem any longer. Peter> -- Peter> Peter da Silva; Ferranti International Controls Corporation; +1 713 274 5180; Peter> Sugar Land, TX 77487-5012; `-_-' "Have you hugged your wolf, today?" Well, if I remember correctly, when my HST uses MNP or better, a blink of the MR light means that a retrain was requested. (Someone else mentioned that it also blinks when the directions swap on the HST, but I never read that.) -Steve -- }>> Steve Haehnichen <<{ shaehnichen@ucsd.edu Disclaimer: UCSD and I do not share any opinions.