RE: (ASCEND) Ticket #802135 - Disconnect Problems on 4048 with 7.0.1

["Kinchen, Tyler (NSTS.JAX)" <TKincher@NA2.US.ML.com>]

	I have to agree with this.  There still appears to be
incompatibilities in the V.90 code from manufacturers that used X2 or
K56Flex.  And I guess the question has to be asked, will Ascend keep coming
out with releases beyond 7.0.X for the MAX 4XXX that improves on the V.90
code?  It sucks having to keep hammering your users about upgrading the
firmware in their modems, not to mention the added support to assist them in
doing so.  We have been giving our users 3Com Sportsters and it's been rare
that I've seen a connection with them above 33.6.  I realize there may be
other factors involved, i.e. line issues but the example below and
experiences I've encountered/heard don't bear that out.  I have also
experienced positive results with the Courier v.everything modem connecting
with our MAX.


J. Tyler Kinchen
Remote Access Group
Merrill Lynch-Jacksonville
@:tyler_kinchen@ml.com


		-----Original Message-----
		From:	R. P. McCormick [mailto:RPM@GCQ.net]
		Sent:	Wednesday, January 06, 1999 11:56 PM
		To:	ascend-users@bungi.com
		Subject:	Re: (ASCEND) Ticket #802135 - Disconnect
Problems on 4048 with 7.0.1


		Yup.  Seen the same thing - actually first hand,
		at one of our folks residence.

		Situation: new telephone line, new Micron computer
		with USR Sportster modem in it.  Modem upgraded
		to v.90 (it previously was X2 only).

		Dialing into our 4048 boxes (we're fed with ISDN PRI's)
		the Max would answer, modem respond, tones forever
		until the line hung up.

		Same setup - but dial an ISP that's connected to the
		same switch and exchange our Max equipment is
		(they're using USR / 3Com) and the modem connects fine,
		in fact, with connections in excess of 33.6 kbps
		(i.e., either X2 or v.90 modulations).

		Disabling v.90 capabilities in the modem:
		it connects to our Max just fine ... albeit at low rates
		(24 kbps and below).

		Other modems (including Hayes and Zoom) were 
		brought over and tested ... bit better with connects
		(at least they'd negotiate and make a connection)
		but the bit rate and throughput was poor ...
		these other modems worked fine connecting
		to the "other guys" with 3Com / USR.

		Upgrading the USR Sportster to the latest (stable?!)
		v.90 code made a world of difference: the modem
		would then connect when it previously had not ...
		and the connect rates were pretty similar between
		our Max'en and the other guys 3Com stuff ...

		But the connection quality still was extremely poor:
		lots of retrains and disconnections.  This was fixed,
		no - make that reduced/improved, by having the 
		telephone company come out three times (at this
		residence) to re-engineer the line.

		Our experience has been that we've gotten the
		best connections with 3Com USR Courier 
		v.everything modems ... followed by those units
		based on the Rockwell chipset (like the earlier Zooms).

		The remedy to problems like you mention above
		seems to be a combination of ensuring that the
		modem has the latest firmware in it, and ensuring
		that the phone line's quality is as best as it could be.

		Regards,
		Bob McCormick


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