Motorola T1/E1 - Manual (Page 57)

Canopy T1/E1 Multiplexer September 2004
T1/E1 Multiplexer FPGA Version 3.4
Page 57 of 73
3.4 T1/E1 LOOPBACK
Each of the 4 T1/E1s can be placed in loopback mode for testing and maintenance
purposes. This provides a bi-directional loopback on the T1/E1 interface. The near end
T1/E1 Transmit is looped back to the near end Receive, and the far end T1/E1 transmit
that arrives over the BH Ethernet port is looped back to the far end Receive.
The T1/E1 loopback remains in effect until the user removes the loopback through the
CLI or through the EMS, or the system is reset.
CAUTION!
Invoking a T1/E1 Loopback will drop voice calls and disrupt user traffic
flow.
Figure 23: Canopy T1/E1 Multiplexer in T1/E1 Loopback mode
Issue 3