We have several MAX 40xx's, each running either 5.0p5 or 5.0p6 on Channelized T1's with AMI/D4 on some T1's, and B8Zs/ESF on others. These are trunk side T1's, no D/A conversions along the path. We're thoroughly testing our connection rates, and haven't seen rates higher than 34k with supraexpress modems, and 38k with motorola modemsurfer modems. Dialing long distance with AT&T to various test numbers, we've seen rates usually at 46k or 42k with the supra express. Ascend claims to get 46k dialing long distance to our ascend, but we have not been able to repeat that test ourselves. We've talked with our carrier, and it appears there should be no difference in the way a long distance call to us is routed, and a local call. Our receive levels are fine, and we know of no D-A conversions on our T's. Just the fact of getting 34k about 15% of the time with the surpa express indicates that 56k is negotiable- but I really have no idea what it means when only low kflex speeds are negotiated. I've read the white papers, and my theory is that there may be some kind of line impairment- but I can't prove it. There have been some reports on this list of the MAX units being more finicky with channelized T1's. A local ISP with PRI has 56k working just fine, and we're stuck at very poor performance. What I'm looking for is: 1- Has anyone with channelized T1 gotten 56k to work on a MAX? On a PM3? 2- How can I tell if there is a problem with the channelized T1's? Are there any magic debugger commands to help diagnose problems? I've also been dialing into the thing thousands of times, recording receive levels and such- and my local modem (consumer 56k modem) reports a receive level of about -25 to -27dB on a non-KFlex speed connection to our 56k max, and it's -15dB on a KFlex speed connection. I don't exactly trust the supraexpress numbers though. (I'm getting this information by using at&v1 and at%q1 about 1 second after the modem reports a CONNECT.) I also am curious about the "RBS counter" number the modem reports. I'm guessing that RBS stands for Robbed Bit Signalling. If anyone has any ideas on how to troubleshoot this, please let me know. We're looking at USR and Livingston equipment now. I expect similar results, but since there seem to be few channelized T1 MAX users out there, there could be some serious flaw in the CSU of the MAX for dealing with channelized T1 -- and it would make sense that KFlex would make any bugs more apparent. Thanks everyone, and especially Ascend- I really like the MAXes, and their kflex performance is just horrible for us. -Will -- Will Pierce System Administrator Dreamscape Online, LLC. willp@dreamscape.com ++ Ascend Users Mailing List ++ To unsubscribe: send unsubscribe to ascend-users-request@bungi.com To get FAQ'd: <<A HREF="http://www.shore.net/~dreaming/ascend-faq">http://www.shore.net/~dreaming/ascend-faq</A>> or <<A HREF="ftp://ftp.shore.net/members/dreaming/ascend-faq.txt">ftp://ftp.shore.net/members/dreaming/ascend-faq.txt</A>> </PRE> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <STRONG>Follow-Ups</STRONG>: <UL> <LI><STRONG><A HREF="msg00910.html">Re: (ASCEND) Channelized T1 - 56k and debugging</A></STRONG></LI> <UL> <LI><EM>From</EM>: Craig Salmond <salmond@unix.cde.com></LI> </UL> </UL> <!--X-Follow-Ups-End--> <!--X-References--> <!--X-References-End--> <!--X-BotPNI--> <HR> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00910.html">Re: (ASCEND) Channelized T1 - 56k and debugging</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00967.html">RE: (ASCEND) 5.0Ai10 Hunt #</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00906.html">(ASCEND) test please ignore & sorry</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00910.html">Re: (ASCEND) Channelized T1 - 56k and debugging</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="mail3.html#00905"><STRONG>Main</STRONG></A></LI> <LI><A HREF="thrd35.html#00905"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> </BODY> </HTML>