First, I assume in your line encoding below you really meant to say "b8zs", which is an acronym for binary 8 zero substitution, or from other texts, bipolar 8 zero substitution.
See: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/b12.htm As far as the problems you are having, I assume that you have done an internal loopback of your own router. I am not talking about looping from the router to the smart jack, or from the router to the far end of the T-1, but using your own internal loopback procedures? How well did the test patterns come out for extended pings? Specifically, you should have run a default pattern of 10-20,000 pings, a pattern with all 1111s, and a pattern with all 0000s. If you have the time, it may e useful to perform an alternating 1s and 0s pattern. Assuming this checked out okay, was the same performed on the far end? Have you posted a copy of a sanitized config for both ends of the link? What type of hardware are you using? Are you working with a Cisco internal CSU/DSU, or an external model? What specific encapsulation are you using on this link; PPP or HDLC? If using PPP, do you or the far side have authentication set? The best single recommendation is to post a sanitized config. >From there, obvious problems can be ruled out. HTH, Paul Werner > Thanks to all of you who have responded. Here's where I'm at: > > The Telco's (two telcos involved) have both said the circuit is sound > and > correct. We can loopback both ways down the length of the circuit and it > works ok. To eliminate hardware problems on my end, I have tested this > router and DSU on the T1 in my office. It is a point to point to our > ISP. > The router came up, I plugged in our IP's, NAT, ACL info and we were > surfing. My hardware/configuration seems to be working ok. The only > thing > left is their hardware/configuration, so I feel that's where the problem > lies. The company I am trying to connect to has over 50 T1's going into > their facility - this is not exactly a new configuration for them. > > Admittedly I am not the most seasoned field person. I have installed > some > T1's, but not 100's. I feel I must be missing something simple, but I > don't > what it is. The default configuration for this DSU is: > > clock source - line > encoding - b8za > framing - esf > timeslots/channels - all 24 > speed - 64k > > I have not modified any of these settings execpt changing the clock > source, > trying it both ways. In our office I know the ISP is providing the > timing, > so I just left everyting on the DSU to default and it worked > beautifully. > > Any other ideas? > > Thanks, > Stephen ________________________________________________ Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=22150&t=22150 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
