Attention! The Adtran support community will be placed in read-only mode on Monday, January 20th, at 8 AM CST for system maintenance. During this time, new posts, replies, or other content updates will be unavailable. The system will return to normal functionality by 9 AM CST on Tuesday, January 21st. If you encounter any product issues during this read-only period, you can reach out to Adtran support at any time. Thank you!
 | Article ID: 1923 |
| Q&A | |
What do I do if my ATLAS 550 T1 Port is in Red Alarm, Blue Alarm, and Loss of Signal?
Q: What do I do if my ATLAS 550 T1 Port is in Red Alarm, Blue Alarm, and Loss of Signal?
A:
If you have a T1 module with a port that is in Red alarm, Blue alarm, and Loss of Signal (LOS) at the same time, this means that you have a List 2 (Part Number ends in L2) T1 module with older firmware on your Atlas. To support an L2 T1 module, the chassis must have at least Firmware revision C.09.03. To download Firmware, go to http://support.adtran.com and navigate to the Atlas 550 page. On that page, click on "Download Atlas 550 Firmware". Figure 1 shows a screen shot of what this problem would look like on a List 2 Dual T1 Module.
Figure 1
