A while back, the phone company moved the old copper T1 circuits at one of our POPs onto fiber. From that day forward, *Many* users have experienced connection problems: can't connect, frequent disconnects. These users can dial other POPs and connect fine. Multiple trouble tickets with the phone company have resulted in multiple switch technicians going through the phone company's switch configuration, but none have found anything wrong. Some customers seem to connect fine, others can't connect at all. The over-all utilization of this POP has dropped 40% - 50% since the switch to fiber. Users began calling out other POPs. The problem "seems" to be related to where a customer calls from. We have provided phone numbers of example customers who are experiencing the problem to the phone company, but they haven't been able to find anything. Has anyone ever experienced anything like this? We are running multiple chassis all running Hiper DSPs at this POP. Thanks, Kevin. ------------------------------------------------------ Kevin Hemsley Systems Engineer kev@ida.net NF7J
I have a similar issue going on with our only POP running USR CT1 gear (currently old quad units - planning to move to HiperDSP later this year). When customers call in from the native exchange area (ie. same NXX-NXX access number), it works flawlessly. However, when they call in over an EAS circuit (NXX from telco 1 to NXX from telco 2), it's nothing but problems. It's not just a v.90 issue either, as I have v.90 disabled on one CT1 span for our super-rural "problem" users who can't stay connected at v.90 speeds. So, it happens across two chassis, four CT1 spans, all quad/netserver/T1 gear. It seems to be the worst with Winmodems, even Lucent based ones (that I generally have the best luck with). Hopeless with Aureal/Motorola "SM56" modems. With or without v.90 disabled on the client end. Could this have anything to do with the ANI digits I get from the telco (I know I'm getting them as I can hear them rattle through before the connect with the T-Berd)? Thanks again for any tips! Brad On Thu, 20 Jun 2002, Kevin Hemsley wrote:
A while back, the phone company moved the old copper T1 circuits at one of our POPs onto fiber. From that day forward, *Many* users have experienced connection problems: can't connect, frequent disconnects. These users can dial other POPs and connect fine. Multiple trouble tickets with the phone company have resulted in multiple switch technicians going through the phone company's switch configuration, but none have found anything wrong. Some customers seem to connect fine, others can't connect at all. The over-all utilization of this POP has dropped 40% - 50% since the switch to fiber. Users began calling out other POPs. The problem "seems" to be related to where a customer calls from. We have provided phone numbers of example customers who are experiencing the problem to the phone company, but they haven't been able to find anything.
Has anyone ever experienced anything like this? We are running multiple chassis all running Hiper DSPs at this POP.
Thanks, Kevin. ------------------------------------------------------ Kevin Hemsley Systems Engineer kev@ida.net NF7J
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This sounds just like the problem someone was describing on the other list quite a few months ago. If I remember right, the poster was a largish customer with an in-house lab, and he was able to reproduce the error but couldn't get anyone's attention at 3Com. Very similar problems, and it had to do with going from one carrier to another... I was keeping track of it for a while, but he was having no luck. We had similar problems. The guy was unable to get Cisco or Lucent/Ascend gear to break the same way. C -- Charles Sprickman spork@inch.com On Thu, 20 Jun 2002, Brad Gass wrote:
I have a similar issue going on with our only POP running USR CT1 gear (currently old quad units - planning to move to HiperDSP later this year).
When customers call in from the native exchange area (ie. same NXX-NXX access number), it works flawlessly. However, when they call in over an EAS circuit (NXX from telco 1 to NXX from telco 2), it's nothing but problems.
It's not just a v.90 issue either, as I have v.90 disabled on one CT1 span for our super-rural "problem" users who can't stay connected at v.90 speeds. So, it happens across two chassis, four CT1 spans, all quad/netserver/T1 gear.
It seems to be the worst with Winmodems, even Lucent based ones (that I generally have the best luck with). Hopeless with Aureal/Motorola "SM56" modems. With or without v.90 disabled on the client end.
Could this have anything to do with the ANI digits I get from the telco (I know I'm getting them as I can hear them rattle through before the connect with the T-Berd)?
Thanks again for any tips!
Brad
On Thu, 20 Jun 2002, Kevin Hemsley wrote:
A while back, the phone company moved the old copper T1 circuits at one of our POPs onto fiber. From that day forward, *Many* users have experienced connection problems: can't connect, frequent disconnects. These users can dial other POPs and connect fine. Multiple trouble tickets with the phone company have resulted in multiple switch technicians going through the phone company's switch configuration, but none have found anything wrong. Some customers seem to connect fine, others can't connect at all. The over-all utilization of this POP has dropped 40% - 50% since the switch to fiber. Users began calling out other POPs. The problem "seems" to be related to where a customer calls from. We have provided phone numbers of example customers who are experiencing the problem to the phone company, but they haven't been able to find anything.
Has anyone ever experienced anything like this? We are running multiple chassis all running Hiper DSPs at this POP.
Thanks, Kevin. ------------------------------------------------------ Kevin Hemsley Systems Engineer kev@ida.net NF7J
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Yes...I have seen this on occasion. It could be that with the addition of the fiber some callers now have a "new route" to take to reach the phone switch and your gear causing too many "step downs" which will translate into those callers getting crappy connections if they connect at all, and no v.90. Sorry I lack the terminology to explain this fully if this is indeed what is going on. Curious...what telco is this with. I have a similar problem with a telco in Michigan that has forced us to remove service of 29 T1's with them to another provider. Todd -----Original Message----- From: usr-tc-admin@mailman.xmission.com [mailto:usr-tc-admin@mailman.xmission.com]On Behalf Of Kevin Hemsley Sent: Thursday, June 20, 2002 12:26 PM To: USR-TC@mailman.xmission.com Subject: [USR-TC] Connection Problems with new circuits A while back, the phone company moved the old copper T1 circuits at one of our POPs onto fiber. From that day forward, *Many* users have experienced connection problems: can't connect, frequent disconnects. These users can dial other POPs and connect fine. Multiple trouble tickets with the phone company have resulted in multiple switch technicians going through the phone company's switch configuration, but none have found anything wrong. Some customers seem to connect fine, others can't connect at all. The over-all utilization of this POP has dropped 40% - 50% since the switch to fiber. Users began calling out other POPs. The problem "seems" to be related to where a customer calls from. We have provided phone numbers of example customers who are experiencing the problem to the phone company, but they haven't been able to find anything. Has anyone ever experienced anything like this? We are running multiple chassis all running Hiper DSPs at this POP. Thanks, Kevin. ------------------------------------------------------ Kevin Hemsley Systems Engineer kev@ida.net NF7J _______________________________________________ USR-TC mailing list USR-TC@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/usr-tc
participants (4)
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Brad Gass -
Charles Sprickman -
Kevin Hemsley -
Todd Bertolozzi