Has anyone had any success programming Digital CO trunks on an Option 11? This customer has 24 Ground start trunks that are being delivered by Verizon via digital handoff and they want them installed on their new Option 11. This is not a typical T1 as these are supposed to be Ground start trunks. Any help would be appreciated.
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Problem with Digital COT's
- Thread starter seahawk04
- Start date
worldwidedialtone
Technical User
Signal type will most likely be LDR in LD 14 for your trunks. Should work about like analog DID I think for the individual trunks
MIKE
MIKE
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- #3
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worldwidedialtone
Technical User
Have you tried D2 B8ZS? Military use to use that set up a lot for DTI T1s
MIKE
MIKE
worldwidedialtone
Technical User
One other question; DID or TIE
MIKE
MIKE
- Thread starter
- #9
NTOldTimer
Programmer
The good suggestion is take a standard RJ-45 data jack and make it a loopback jack using the pinout Perrypj gave you above. Take a piece of crosscut wire and connect pin 1 to pin 5 then take another piece and connect pin 2 to pin 4. Plug your T1 cable from the Opt 11 into your loopback jack instead of the telco jack. Then enable the Loop in 60.
If you run clean to the loopback jack you'll need to work with telco on configuration. Make sure they understand you have a Nortel Meridian switch.
If you still get the errors when running to your loopback jack then try resetting the hardware first. Disable the card and the D-Channel (and TMDI if applicable) and pull it out of the switch and wait a few minutes before putting it back in. If that doesn't fix it then reprogram the software (out everything and start over) if that doesn't solve the problem then get some new hardware. At some point you'll have to consider that you may have trouble with the wiring somewhere. If you can get some new cables to try it may be easy to hook up some replacement(s) as a test.
This is the best way to isolate your trouble. Look at the suggestions and just work them one at a time. It's easy to get overwhelmed with a lot of information but you may be able to isolate the trouble with one or two steps that will point you in the right direction to resolution.
You need to be able to answer these questions
1) is the problem in my switch or the signal I'm getting from telco?
2) If it's a problem in my switch is it hardware or software?
Sometimes good luck comes from good work.
Methods minimize madness but I still feel crazy when I can't figure it out. Tek-Tips helps sometimes.
I owe a lot of thanks to these people.
If you run clean to the loopback jack you'll need to work with telco on configuration. Make sure they understand you have a Nortel Meridian switch.
If you still get the errors when running to your loopback jack then try resetting the hardware first. Disable the card and the D-Channel (and TMDI if applicable) and pull it out of the switch and wait a few minutes before putting it back in. If that doesn't fix it then reprogram the software (out everything and start over) if that doesn't solve the problem then get some new hardware. At some point you'll have to consider that you may have trouble with the wiring somewhere. If you can get some new cables to try it may be easy to hook up some replacement(s) as a test.
This is the best way to isolate your trouble. Look at the suggestions and just work them one at a time. It's easy to get overwhelmed with a lot of information but you may be able to isolate the trouble with one or two steps that will point you in the right direction to resolution.
You need to be able to answer these questions
1) is the problem in my switch or the signal I'm getting from telco?
2) If it's a problem in my switch is it hardware or software?
Sometimes good luck comes from good work.
Methods minimize madness but I still feel crazy when I can't figure it out. Tek-Tips helps sometimes.
I owe a lot of thanks to these people.
NTOldTimer
Programmer
I would agree with PERRYPJ. Framing problems can often be wiring and PERRYPJ posted a good idea to use a loopback jack to isolate the Opt 11 wiring.
But I think it could be a T1 config issue (LD 17). From what I've experienced sometimes bits don't go where they should on an Opt 11. It was so bad at one time we called them COWS (Corruption On the Wall). Although the software is much better now, Seahawk didn't say what software the Opt 11 was running and I've had success solving various T1 issues by reprogramming. Even recently.
Most definitely, if the Opt 11 T1 config doesn't match the telco, a T1 can exhibit Frame Errors as some have found.
But clearly, I would agree with PERRYPJ the Trunk Config (LD 14) will not be the cause of frame errors.
But I think it could be a T1 config issue (LD 17). From what I've experienced sometimes bits don't go where they should on an Opt 11. It was so bad at one time we called them COWS (Corruption On the Wall). Although the software is much better now, Seahawk didn't say what software the Opt 11 was running and I've had success solving various T1 issues by reprogramming. Even recently.
Most definitely, if the Opt 11 T1 config doesn't match the telco, a T1 can exhibit Frame Errors as some have found.
But clearly, I would agree with PERRYPJ the Trunk Config (LD 14) will not be the cause of frame errors.
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