[comp.dcom.modems] Telebit TB+ problem

dale@eridani.UUCP (dale) (05/13/88)

I have a problem with my telebit trailblazer that seems very strange. When
I dial out from the trailblazer to a 2400 baud modem(maybe 1200 as well) I hear the 1200 baud carrier, then the 2400 baud carrier, and then the hissing sound they usually make just before connecting. Many times the trailblazer will produce a "hooting" sound out the speaker and trash the connection. I thought at first that this was a problem with my feed's modems, but when I dialed out on the tb+ and back into my multitech 224e, I got the same symptom. This tends to say that it is the tb+, and not the desti


nation modem. Has anyone had these symptoms?
I have rev 4 firmware now, but it did the same thing with 3.0.

Dale at (dlb,altnet,pyramid)!eridani!dale

piet@cwi.nl (Piet Beertema) (05/14/88)

	When I dial out from the trailblazer to a 2400 baud modem
	I hear the 1200 baud carrier, then the 2400 baud carrier,
	and then the hissing sound....
	Many times the trailblazer will produce a "hooting" sound
	out the speaker and trash the connection.
	Has anyone had these symptoms?
Yes, occasionally. And not only when calling other
brands of modems, but even when calling a TB+ (rev.
3.0 or 4.0) with the calling TB's S50=3. In my case
S95=2 (on both calling and called TB's), haven't
tried it with S95=0 yet. But the described problem
also occurs when calling a 2400 modem that doesn't
have MNP.

-- 
	Piet Beertema, CWI, Amsterdam
	(piet@cwi.nl)