Comtech EF Data SDM-9220 - Manual (Page 97)

Product Description
Memotec Inc. 5-19
Workaround:
Substitute a dual port T1/E1 interface card for the T1 interface,
and configure it for T1 operations.
NOTE: T1 operations are indicated when the port LED labelled T1-E1 is green. E1
operations are indicated when the T1-E1 LED is yellow. To interpret the other
status LEDs, refer to “Interface Card Status LEDs” on page 5-23 .
Figure 5-10: The Single Port T1/E1 interface card (top)
Figure 5-11: The Dual Port T1/E1 interface card (bottom)