The main problem is what I refer to as "hung modem" where 2 contiguous modems in a DSP will somehow fail in such a way that incoming calls are answered, but never complete the carrier. (list con shows them as call type DIALIN INVALID) The errant modems show orders of magnitude more failed calls in performance monitor. What the user dialing in experiences is something like this: The TC picks up and transmits the answer tone. The client modem begins making the handshake sounds, but the TC continues with the single tone as if the client modem had not responded. Selecting the modems in TCM and performing a software reset on them will clear it up 99% of the time. They always appear in pairs.
Does anyone know what might cause this?
DSP Lockups. Each DSP handles 2 modems, and as such, when it locks up in any way, it takes out 2 modems. Depending on switch type, it manifests itself to the customer in various ways. You described one. This has been a horrible bug in the DSP since it was first introduced, and they have NEVER been able to fix it. It has gotten better over the years, but it is still a major concern for us. Our solution is to watch for it - busy out the entire card, wait for customers to drop off the card, and then reboot it. --------------------------------------------------------------------- | Curtis V. Shambeau | curt@execpc.com | Senior Vice President | | ExecPC, Inc. - A Voyager.net company - NASDAQ Symbol: VOYN | --------------------------------------------------------------------- - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.