If you have all the Meridian docs, look in 553-3011-310 (Option 11c 1.5 Mb DTI/PRI) on page 51. It gives you a full explanation of what the yellow and red alarms are. (Even if you aren't using an option 11, the alarms are the same as on a large system.)
A YELLOW ALARM IS SENT TO YOU FROM THE FAR END INDICATING THAT THEY ARE NOT SEEING YOU OR THE NETWORK, A RED ALARM IN TURN MEANS THAT YOU ARE NOT SEEING THEM OR THE NETWORK. WHEN YOU RECEIVE A RED THE SWITCH WILL SEND A YELLOW TO THE FAR END
If you have a RED alarm, I would look for a wiring problem on your site as this means your PBX does not see the T1. Do a loop back on your wiring from the Phone Company smart jack. If you TI card comes up the it is a phone company problem.
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