do ISPs keep track of end-user IP changes within thier network?

Vinny_Abello at Vinny_Abello at
Mon Dec 16 20:16:01 UTC 2013

Dell - Internal Use - Confidential 

PM3's were pretty solid. PM4's, not so much. They were often problematic requiring periodic reboots of the entire chassis to keep them sane even right up through the last firmware release until Lucent killed them off in favor of their newly acquired Ascend equipment. The team that designed them were good guys. We used to work directly with them on issues and get early access to beta releases of new firmware for the PM's, including new cutting edge protocols such as K56Flex and later V.90. :)


-----Original Message-----
From: Carlos Kamtha [mailto:kamtha at] 
Sent: Saturday, December 14, 2013 3:05 AM
To: sam at
Cc: nanog at
Subject: Re: do ISPs keep track of end-user IP changes within thier network?

The PMs were fantastic. 

PM3's were pretty good as well. 2 PRIs or T1s.. 48 56k digital modems, + ISDN support.. :)


On Fri, Dec 13, 2013 at 05:21:18PM -0500, Sam Moats wrote:
> I still have a soft spot for the Portmasters :-). We had rows of PM2's 
> with US robotics 33.6K sportster modems attached on 8mm tape racks.
> Back when a town of 40K people could all connect through 2XT1's and 
> everyone was happy.
> Sam Moats
> On 2013-12-13 16:59, Jon Lewis wrote:

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