Hi everyone.. I have a 6.1 MICS with 2 DTI cards. We have 2 full T1s (B8ZS/ESF) with DIDs (no PRI). We are using the internal CSU on the cards. All of our calls come across the T1s.
Periodically, the entire system will lock up. It seems to happen when it is busy (although I'm somewhat relying on the unreliable receptionist to try to find the pattern). It has happened 5 or 6 times in the month since we brought the system online - always during business hours. I programmed a spare set with the first channels of the first T1 (incoming descending) and the last channels of the last one (outgoing ascending) so if the switch freezes again I can see how many lines were being used at the time of the freeze.
Both DTI cards have all of the error lights lit when the system freezes. I press the reset buttons on the DTI cards and allow them to fail out, then press the button again. All of the phones flash as if they were just plugged in and then everything works fine.
The alarm code on my set is usually 44-0. Essentially the only explanation in the manual is "T1 problem" which I could have determined in my sleep. I tend to think it is a telco issue and not a bad card since both cards have the error lights on. I asked the telco to test the lines and both them and Verizon (the telco rents VZ lines) claim to have them built to spec.
Since it seems to only happen when it is very busy, I am wondering if something is causing corrupt data to build up somewhere and that once it reaches a critical mass it locks up the system. I called my vendor and he seems to think it is a telco issue also. The tech support at the telco isn't what it might be so I'm hoping I can kick them into doing what needs to be done if anyone has any ideas.
Thanks for any insight.
Periodically, the entire system will lock up. It seems to happen when it is busy (although I'm somewhat relying on the unreliable receptionist to try to find the pattern). It has happened 5 or 6 times in the month since we brought the system online - always during business hours. I programmed a spare set with the first channels of the first T1 (incoming descending) and the last channels of the last one (outgoing ascending) so if the switch freezes again I can see how many lines were being used at the time of the freeze.
Both DTI cards have all of the error lights lit when the system freezes. I press the reset buttons on the DTI cards and allow them to fail out, then press the button again. All of the phones flash as if they were just plugged in and then everything works fine.
The alarm code on my set is usually 44-0. Essentially the only explanation in the manual is "T1 problem" which I could have determined in my sleep. I tend to think it is a telco issue and not a bad card since both cards have the error lights on. I asked the telco to test the lines and both them and Verizon (the telco rents VZ lines) claim to have them built to spec.
Since it seems to only happen when it is very busy, I am wondering if something is causing corrupt data to build up somewhere and that once it reaches a critical mass it locks up the system. I called my vendor and he seems to think it is a telco issue also. The tech support at the telco isn't what it might be so I'm hoping I can kick them into doing what needs to be done if anyone has any ideas.
Thanks for any insight.
